prepare tls beta release

* intra doc conversion

* rm trailing blank comment

.github/workflows/bench.yml

@@ -1,29 +0,0 @@
-name: Benchmark (Linux)
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened]
-  push:
-    branches:
-      - master
-      - '1.0'
-
-jobs:
-  check_benchmark:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Install Rust
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: nightly
-          profile: minimal
-          override: true
-
-      - name: Check benchmark
-        uses: actions-rs/cargo@v1
-        with:
-          command: bench
-          args: --package=actix-service

.github/workflows/linux.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - 1.42.0
+          - 1.46.0
           - stable
           - nightly
 

Cargo.toml

@@ -1,7 +1,6 @@
 [workspace]
 members = [
   "actix-codec",
-  "actix-connect",
   "actix-rt",
   "actix-macros",
   "actix-service",
@@ -17,7 +16,6 @@ members = [
 
 [patch.crates-io]
 actix-codec = { path = "actix-codec" }
-actix-connect = { path = "actix-connect" }
 actix-rt = { path = "actix-rt" }
 actix-macros = { path = "actix-macros" }
 actix-server = { path = "actix-server" }

README.md

@@ -14,7 +14,7 @@ Actix net - framework for composable network services
 ## Documentation & community resources
 
 * [Chat on Gitter](https://gitter.im/actix/actix)
-* Minimum supported Rust version: 1.42 or later
+* Minimum supported Rust version: 1.46 or later
 
 ## Example
 

actix-codec/CHANGES.md

@@ -1,14 +1,25 @@
 # Changes
 
 ## Unreleased - 2020-xx-xx
-* Upgrade `pin-project` to `1.0`.
+
+
+## 0.4.0-beta.1 - 2020-12-28
+* Replace `pin-project` with `pin-project-lite`. [#237]
+* Upgrade `tokio` dependency to `1`. [#237]
+* Upgrade `tokio-util` dependency to `0.6`. [#237]
+* Upgrade `bytes` dependency to `1`. [#237]
+
+[#237]: https://github.com/actix/actix-net/pull/237
+
 
 ## 0.3.0 - 2020-08-23
 * No changes from beta 2.
 
+
 ## 0.3.0-beta.2 - 2020-08-19
 * Remove unused type parameter from `Framed::replace_codec`.
 
+
 ## 0.3.0-beta.1 - 2020-08-19
 * Use `.advance()` instead of `.split_to()`.
 * Upgrade `tokio-util` to `0.3`.
@@ -18,32 +29,31 @@
 * Add method on `Framed` to get a pinned reference to the underlying I/O.
 * Add method on `Framed` check emptiness of read buffer.
 
-## [0.2.0] - 2019-12-10
 
+## 0.2.0 - 2019-12-10
 * Use specific futures dependencies
 
-## [0.2.0-alpha.4]
 
+## 0.2.0-alpha.4
 * Fix buffer remaining capacity calculation
 
-## [0.2.0-alpha.3]
 
+## 0.2.0-alpha.3
 * Use tokio 0.2
-
 * Fix low/high watermark for write/read buffers
 
-## [0.2.0-alpha.2]
 
+## 0.2.0-alpha.2
 * Migrated to `std::future`
 
-## [0.1.2] - 2019-03-27
 
+## 0.1.2 - 2019-03-27
 * Added `Framed::map_io()` method.
 
-## [0.1.1] - 2019-03-06
 
+## 0.1.1 - 2019-03-06
 * Added `FramedParts::with_read_buffer()` method.
 
-## [0.1.0] - 2018-12-09
 
+## 0.1.0 - 2018-12-09
 * Move codec to separate crate

actix-codec/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "actix-codec"
-version = "0.3.0"
+version = "0.4.0-beta.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "Codec utilities for working with framed protocols."
+description = "Codec utilities for working with framed protocols"
 keywords = ["network", "framework", "async", "futures"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
@@ -17,10 +17,10 @@ path = "src/lib.rs"
 
 [dependencies]
 bitflags = "1.2.1"
-bytes = "0.5.2"
-futures-core = { version = "0.3.4", default-features = false }
-futures-sink = { version = "0.3.4", default-features = false }
+bytes = "1"
+futures-core = { version = "0.3.7", default-features = false }
+futures-sink = { version = "0.3.7", default-features = false }
 log = "0.4"
-pin-project = "1.0.0"
-tokio = { version = "0.2.5", default-features = false }
-tokio-util = { version = "0.3.1", default-features = false, features = ["codec"] }
+pin-project-lite = "0.2"
+tokio = "1"
+tokio-util = { version = "0.6", features = ["codec", "io"] }

actix-codec/src/bcodec.rs

@@ -14,7 +14,7 @@ impl Encoder<Bytes> for BytesCodec {
 
     #[inline]
     fn encode(&mut self, item: Bytes, dst: &mut BytesMut) -> Result<(), Self::Error> {
-        dst.extend_from_slice(item.bytes());
+        dst.extend_from_slice(item.chunk());
         Ok(())
     }
 }

actix-codec/src/framed.rs

@@ -5,7 +5,6 @@ use std::{fmt, io};
 use bytes::{Buf, BytesMut};
 use futures_core::{ready, Stream};
 use futures_sink::Sink;
-use pin_project::pin_project;
 
 use crate::{AsyncRead, AsyncWrite, Decoder, Encoder};
 
@@ -21,22 +20,23 @@ bitflags::bitflags! {
     }
 }
 
-/// A unified `Stream` and `Sink` interface to an underlying I/O object, using
-/// the `Encoder` and `Decoder` traits to encode and decode frames.
-///
-/// Raw I/O objects work with byte sequences, but higher-level code usually
-/// wants to batch these into meaningful chunks, called "frames". This
-/// method layers framing on top of an I/O object, by using the `Encoder`/`Decoder`
-/// traits to handle encoding and decoding of message frames. Note that
-/// the incoming and outgoing frame types may be distinct.
-#[pin_project]
-pub struct Framed<T, U> {
-    #[pin]
-    io: T,
-    codec: U,
-    flags: Flags,
-    read_buf: BytesMut,
-    write_buf: BytesMut,
+pin_project_lite::pin_project! {
+    /// A unified `Stream` and `Sink` interface to an underlying I/O object, using
+    /// the `Encoder` and `Decoder` traits to encode and decode frames.
+    ///
+    /// Raw I/O objects work with byte sequences, but higher-level code usually
+    /// wants to batch these into meaningful chunks, called "frames". This
+    /// method layers framing on top of an I/O object, by using the `Encoder`/`Decoder`
+    /// traits to handle encoding and decoding of message frames. Note that
+    /// the incoming and outgoing frame types may be distinct.
+    pub struct Framed<T, U> {
+        #[pin]
+        io: T,
+        codec: U,
+        flags: Flags,
+        read_buf: BytesMut,
+        write_buf: BytesMut,
+    }
 }
 
 impl<T, U> Framed<T, U>
@@ -220,7 +220,8 @@ impl<T, U> Framed<T, U> {
             if remaining < LW {
                 this.read_buf.reserve(HW - remaining)
             }
-            let cnt = match this.io.poll_read_buf(cx, &mut this.read_buf) {
+
+            let cnt = match tokio_util::io::poll_read_buf(this.io, cx, this.read_buf) {
                 Poll::Pending => return Poll::Pending,
                 Poll::Ready(Err(e)) => return Poll::Ready(Some(Err(e.into()))),
                 Poll::Ready(Ok(cnt)) => cnt,

actix-codec/src/lib.rs

@@ -1,16 +1,16 @@
-//! Utilities for encoding and decoding frames.
+//! Codec utilities for working with framed protocols.
 //!
 //! Contains adapters to go from streams of bytes, [`AsyncRead`] and
 //! [`AsyncWrite`], to framed streams implementing [`Sink`] and [`Stream`].
 //! Framed streams are also known as `transports`.
 //!
-//! [`AsyncRead`]: AsyncRead
-//! [`AsyncWrite`]: AsyncWrite
 //! [`Sink`]: futures_sink::Sink
 //! [`Stream`]: futures_core::Stream
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![warn(missing_docs)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 mod bcodec;
 mod framed;
@@ -18,5 +18,6 @@ mod framed;
 pub use self::bcodec::BytesCodec;
 pub use self::framed::{Framed, FramedParts};
 
-pub use tokio::io::{AsyncRead, AsyncWrite};
+pub use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 pub use tokio_util::codec::{Decoder, Encoder};
+pub use tokio_util::io::poll_read_buf;

actix-connect/CHANGES.md

@@ -1,154 +0,0 @@
-# Changes
-
-## Unreleased - 2020-xx-xx
-
-
-## 2.0.0 - 2020-09-02
-- No significant changes from `2.0.0-alpha.4`.
-
-## 2.0.0-alpha.4 - 2020-08-17
-
-### Changed
-
-* Update `rustls` dependency to 0.18
-* Update `tokio-rustls` dependency to 0.14
-
-
-## [2.0.0-alpha.3] - 2020-05-08
-
-### Fixed
-
-* Corrected spelling of `ConnectError::Unresolverd` to `ConnectError::Unresolved`
-
-## [2.0.0-alpha.2] - 2020-03-08
-
-### Changed
-
-* Update `trust-dns-proto` dependency to 0.19. [#116]
-* Update `trust-dns-resolver` dependency to 0.19. [#116]
-* `Address` trait is now required to have static lifetime. [#116]
-* `start_resolver` and `start_default_resolver` are now `async` and may return a `ConnectError`. [#116]
-
-[#116]: https://github.com/actix/actix-net/pull/116
-
-## [2.0.0-alpha.1] - 2020-03-03
-
-### Changed
-
-* Update `rustls` dependency to 0.17
-* Update `tokio-rustls` dependency to 0.13
-
-## [1.0.2] - 2020-01-15
-
-* Fix actix-service 1.0.3 compatibility
-
-## [1.0.1] - 2019-12-15
-
-* Fix trust-dns-resolver compilation
-
-## [1.0.0] - 2019-12-11
-
-* Release
-
-## [1.0.0-alpha.3] - 2019-12-07
-
-### Changed
-
-* Migrate to tokio 0.2
-
-
-## [1.0.0-alpha.2] - 2019-12-02
-
-### Changed
-
-* Migrated to `std::future`
-
-
-## [0.3.0] - 2019-10-03
-
-### Changed
-
-* Update `rustls` to 0.16
-* Minimum required Rust version upped to 1.37.0
-
-## [0.2.5] - 2019-09-05
-
-* Add `TcpConnectService`
-
-## [0.2.4] - 2019-09-02
-
-* Use arbiter's storage for default async resolver
-
-## [0.2.3] - 2019-08-05
-
-* Add `ConnectService` and `OpensslConnectService`
-
-## [0.2.2] - 2019-07-24
-
-* Add `rustls` support
-
-## [0.2.1] - 2019-07-17
-
-### Added
-
-* Expose Connect addrs #30
-
-### Changed
-
-* Update `derive_more` to 0.15
-
-
-## [0.2.0] - 2019-05-12
-
-### Changed
-
-* Upgrade to actix-service 0.4
-
-
-## [0.1.5] - 2019-04-19
-
-### Added
-
-* `Connect::set_addr()`
-
-### Changed
-
-* Use trust-dns-resolver 0.11.0
-
-
-## [0.1.4] - 2019-04-12
-
-### Changed
-
-* Do not start default resolver immediately for default connector.
-
-
-## [0.1.3] - 2019-04-11
-
-### Changed
-
-* Start trust-dns default resolver on first use
-
-## [0.1.2] - 2019-04-04
-
-### Added
-
-* Log error if dns system config could not be loaded.
-
-### Changed
-
-* Rename connect Connector to TcpConnector #10
-
-
-## [0.1.1] - 2019-03-15
-
-### Fixed
-
-* Fix error handling for single address
-
-
-## [0.1.0] - 2019-03-14
-
-* Refactor resolver and connector services
-
-* Rename crate

actix-connect/Cargo.toml

@@ -1,58 +0,0 @@
-[package]
-name = "actix-connect"
-version = "2.0.0"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "TCP connector service for Actix ecosystem."
-keywords = ["network", "framework", "async", "futures"]
-homepage = "https://actix.rs"
-repository = "https://github.com/actix/actix-net.git"
-documentation = "https://docs.rs/actix-connect/"
-categories = ["network-programming", "asynchronous"]
-license = "MIT OR Apache-2.0"
-edition = "2018"
-
-[package.metadata.docs.rs]
-features = ["openssl", "rustls", "uri"]
-
-[lib]
-name = "actix_connect"
-path = "src/lib.rs"
-
-[features]
-default = ["uri"]
-
-# openssl
-openssl = ["open-ssl", "tokio-openssl"]
-
-# rustls
-rustls = ["rust-tls", "tokio-rustls", "webpki"]
-
-# support http::Uri as connect address
-uri = ["http"]
-
-[dependencies]
-actix-service = "1.0.6"
-actix-codec = "0.3.0"
-actix-utils = "2.0.0"
-actix-rt = "1.1.1"
-
-derive_more = "0.99.2"
-either = "1.5.3"
-futures-util = { version = "0.3.4", default-features = false }
-http = { version = "0.2.0", optional = true }
-log = "0.4"
-trust-dns-proto = { version = "0.19", default-features = false, features = ["tokio-runtime"] }
-trust-dns-resolver = { version = "0.19", default-features = false, features = ["tokio-runtime", "system-config"] }
-
-# openssl
-open-ssl = { package = "openssl", version = "0.10", optional = true }
-tokio-openssl = { version = "0.4.0", optional = true }
-
-# rustls
-rust-tls = { package = "rustls", version = "0.18.0", optional = true }
-tokio-rustls = { version = "0.14.0", optional = true }
-webpki = { version = "0.21", optional = true }
-
-[dev-dependencies]
-bytes = "0.5.3"
-actix-testing = "1.0.0"

actix-connect/LICENSE-APACHE

@@ -1 +0,0 @@
-../LICENSE-APACHE

actix-connect/LICENSE-MIT

@@ -1 +0,0 @@
-../LICENSE-MIT

actix-connect/tests/test_connect.rs

@@ -1,127 +0,0 @@
-use std::io;
-
-use actix_codec::{BytesCodec, Framed};
-use actix_rt::net::TcpStream;
-use actix_service::{fn_service, Service, ServiceFactory};
-use actix_testing::TestServer;
-use bytes::Bytes;
-use futures_util::sink::SinkExt;
-
-use actix_connect::resolver::{ResolverConfig, ResolverOpts};
-use actix_connect::Connect;
-
-#[cfg(feature = "openssl")]
-#[actix_rt::test]
-async fn test_string() {
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let mut conn = actix_connect::default_connector();
-    let addr = format!("localhost:{}", srv.port());
-    let con = conn.call(addr.into()).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-}
-
-#[cfg(feature = "rustls")]
-#[actix_rt::test]
-async fn test_rustls_string() {
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let mut conn = actix_connect::default_connector();
-    let addr = format!("localhost:{}", srv.port());
-    let con = conn.call(addr.into()).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-}
-
-#[actix_rt::test]
-async fn test_static_str() {
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let resolver = actix_connect::start_default_resolver().await.unwrap();
-    let mut conn = actix_connect::new_connector(resolver.clone());
-
-    let con = conn.call(Connect::with("10", srv.addr())).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-
-    let connect = Connect::new(srv.host().to_owned());
-    let mut conn = actix_connect::new_connector(resolver);
-    let con = conn.call(connect).await;
-    assert!(con.is_err());
-}
-
-#[actix_rt::test]
-async fn test_new_service() {
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let resolver =
-        actix_connect::start_resolver(ResolverConfig::default(), ResolverOpts::default())
-            .await
-            .unwrap();
-
-    let factory = actix_connect::new_connector_factory(resolver);
-
-    let mut conn = factory.new_service(()).await.unwrap();
-    let con = conn.call(Connect::with("10", srv.addr())).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-}
-
-#[cfg(all(feature = "openssl", feature = "uri"))]
-#[actix_rt::test]
-async fn test_openssl_uri() {
-    use std::convert::TryFrom;
-
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let mut conn = actix_connect::default_connector();
-    let addr = http::Uri::try_from(format!("https://localhost:{}", srv.port())).unwrap();
-    let con = conn.call(addr.into()).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-}
-
-#[cfg(all(feature = "rustls", feature = "uri"))]
-#[actix_rt::test]
-async fn test_rustls_uri() {
-    use std::convert::TryFrom;
-
-    let srv = TestServer::with(|| {
-        fn_service(|io: TcpStream| async {
-            let mut framed = Framed::new(io, BytesCodec);
-            framed.send(Bytes::from_static(b"test")).await?;
-            Ok::<_, io::Error>(())
-        })
-    });
-
-    let mut conn = actix_connect::default_connector();
-    let addr = http::Uri::try_from(format!("https://localhost:{}", srv.port())).unwrap();
-    let con = conn.call(addr.into()).await.unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-}

actix-macros/src/lib.rs

@@ -1,5 +1,8 @@
 //! Macros for use with Tokio
-extern crate proc_macro;
+
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use proc_macro::TokenStream;
 use quote::quote;

actix-rt/CHANGES.md

@@ -2,10 +2,26 @@
 
 ## Unreleased - 2020-xx-xx
 
-### Added
 
+## 2.0.0-beta.1 - 2020-12-28
+### Added
 * Add `System::attach_to_tokio` method. [#173]
 
+### Changed
+* Update `tokio` dependency to `1.0`. [#236]
+* Rename `time` module `delay_for` to `sleep`, `delay_until` to `sleep_until`, `Delay` to `Sleep`
+  to stay aligned with Tokio's naming. [#236]
+* Remove `'static` lifetime requirement for `Runtime::block_on` and `SystemRunner::block_on`.
+  * These methods now accept `&self` when calling. [#236]
+* Remove `'static` lifetime requirement for `System::run` and `Builder::run`. [#236]
+* `Arbiter::spawn` now panics when `System` is not in scope. [#207]
+
+### Fixed
+* Fix work load issue by removing `PENDING` thread local. [#207]
+
+[#207]: https://github.com/actix/actix-net/pull/207
+[#236]: https://github.com/actix/actix-net/pull/236
+
 ## [1.1.1] - 2020-04-30
 
 ### Fixed

actix-rt/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "actix-rt"
-version = "1.1.1"
+version = "2.0.0-beta.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "Actix runtime"
+description = "Tokio-based single-thread async runtime for the Actix ecosystem"
 keywords = ["network", "framework", "async", "futures"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
@@ -17,11 +17,5 @@ path = "src/lib.rs"
 
 [dependencies]
 actix-macros = "0.1.0"
-copyless = "0.1.4"
-futures-channel = "0.3.4"
-futures-util = { version = "0.3.4", default-features = false, features = ["alloc"] }
-smallvec = "1"
-tokio = { version = "0.2.6", default-features = false, features = ["rt-core", "rt-util", "io-driver", "tcp", "uds", "udp", "time", "signal", "stream"] }
 
-[dev-dependencies]
-tokio = { version = "0.2.6", features = ["full"] }
+tokio = { version = "1", features = ["rt", "net", "signal", "sync", "time"] }

actix-rt/src/arbiter.rs

@@ -1,31 +1,30 @@
 use std::any::{Any, TypeId};
-use std::cell::{Cell, RefCell};
+use std::cell::RefCell;
 use std::collections::HashMap;
+use std::future::Future;
 use std::pin::Pin;
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::task::{Context, Poll};
 use std::{fmt, thread};
 
-use futures_channel::mpsc::{unbounded, UnboundedReceiver, UnboundedSender};
-use futures_channel::oneshot::{channel, Canceled, Sender};
-use futures_util::{
-    future::{self, Future, FutureExt},
-    stream::Stream,
-};
+use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender};
+use tokio::sync::oneshot::{channel, error::RecvError as Canceled, Sender};
+// use futures_util::stream::FuturesUnordered;
+// use tokio::task::JoinHandle;
+// use tokio::stream::StreamExt;
+use tokio::task::LocalSet;
 
 use crate::runtime::Runtime;
 use crate::system::System;
 
-use copyless::BoxHelper;
-
-use smallvec::SmallVec;
-pub use tokio::task::JoinHandle;
-
 thread_local!(
     static ADDR: RefCell<Option<Arbiter>> = RefCell::new(None);
-    static RUNNING: Cell<bool> = Cell::new(false);
-    static Q: RefCell<Vec<Pin<Box<dyn Future<Output = ()>>>>> = RefCell::new(Vec::new());
-    static PENDING: RefCell<SmallVec<[JoinHandle<()>; 8]>> = RefCell::new(SmallVec::new());
+    // TODO: Commented out code are for Arbiter::local_join function.
+    // It can be safely removed if this function is not used in actix-*.
+    //
+    // /// stores join handle for spawned async tasks.
+    // static HANDLE: RefCell<FuturesUnordered<JoinHandle<()>>> =
+    //     RefCell::new(FuturesUnordered::new());
     static STORAGE: RefCell<HashMap<TypeId, Box<dyn Any>>> = RefCell::new(HashMap::new());
 );
 
@@ -69,14 +68,14 @@ impl Default for Arbiter {
 }
 
 impl Arbiter {
-    pub(crate) fn new_system() -> Self {
-        let (tx, rx) = unbounded();
+    pub(crate) fn new_system(local: &LocalSet) -> Self {
+        let (tx, rx) = unbounded_channel();
 
         let arb = Arbiter::with_sender(tx);
         ADDR.with(|cell| *cell.borrow_mut() = Some(arb.clone()));
-        RUNNING.with(|cell| cell.set(false));
         STORAGE.with(|cell| cell.borrow_mut().clear());
-        Arbiter::spawn(ArbiterController { stop: None, rx });
+
+        local.spawn_local(ArbiterController { rx });
 
         arb
     }
@@ -91,13 +90,14 @@ impl Arbiter {
     }
 
     /// Check if current arbiter is running.
+    #[deprecated(note = "Thread local variables for running state of Arbiter is removed")]
     pub fn is_running() -> bool {
-        RUNNING.with(|cell| cell.get())
+        false
     }
 
     /// Stop arbiter from continuing it's event loop.
     pub fn stop(&self) {
-        let _ = self.sender.unbounded_send(ArbiterCommand::Stop);
+        let _ = self.sender.send(ArbiterCommand::Stop);
     }
 
     /// Spawn new thread and run event loop in spawned thread.
@@ -106,69 +106,47 @@ impl Arbiter {
         let id = COUNT.fetch_add(1, Ordering::Relaxed);
         let name = format!("actix-rt:worker:{}", id);
         let sys = System::current();
-        let (arb_tx, arb_rx) = unbounded();
-        let arb_tx2 = arb_tx.clone();
+        let (tx, rx) = unbounded_channel();
 
         let handle = thread::Builder::new()
             .name(name.clone())
-            .spawn(move || {
-                let mut rt = Runtime::new().expect("Can not create Runtime");
-                let arb = Arbiter::with_sender(arb_tx);
+            .spawn({
+                let tx = tx.clone();
+                move || {
+                    let rt = Runtime::new().expect("Can not create Runtime");
+                    let arb = Arbiter::with_sender(tx);
 
-                let (stop, stop_rx) = channel();
-                RUNNING.with(|cell| cell.set(true));
-                STORAGE.with(|cell| cell.borrow_mut().clear());
+                    STORAGE.with(|cell| cell.borrow_mut().clear());
 
-                System::set_current(sys);
+                    System::set_current(sys);
 
-                // start arbiter controller
-                rt.spawn(ArbiterController {
-                    stop: Some(stop),
-                    rx: arb_rx,
-                });
-                ADDR.with(|cell| *cell.borrow_mut() = Some(arb.clone()));
+                    ADDR.with(|cell| *cell.borrow_mut() = Some(arb.clone()));
 
-                // register arbiter
-                let _ = System::current()
-                    .sys()
-                    .unbounded_send(SystemCommand::RegisterArbiter(id, arb));
+                    // register arbiter
+                    let _ = System::current()
+                        .sys()
+                        .send(SystemCommand::RegisterArbiter(id, arb));
 
-                // run loop
-                let _ = rt.block_on(stop_rx).unwrap_or(1);
+                    // start arbiter controller
+                    // run loop
+                    rt.block_on(ArbiterController { rx });
 
-                // unregister arbiter
-                let _ = System::current()
-                    .sys()
-                    .unbounded_send(SystemCommand::UnregisterArbiter(id));
+                    // unregister arbiter
+                    let _ = System::current()
+                        .sys()
+                        .send(SystemCommand::UnregisterArbiter(id));
+                }
             })
             .unwrap_or_else(|err| {
                 panic!("Cannot spawn an arbiter's thread {:?}: {:?}", &name, err)
             });
 
         Arbiter {
-            sender: arb_tx2,
+            sender: tx,
             thread_handle: Some(handle),
         }
     }
 
-    pub(crate) fn run_system(rt: Option<&Runtime>) {
-        RUNNING.with(|cell| cell.set(true));
-        Q.with(|cell| {
-            let mut v = cell.borrow_mut();
-            for fut in v.drain(..) {
-                if let Some(rt) = rt {
-                    rt.spawn(fut);
-                } else {
-                    tokio::task::spawn_local(fut);
-                }
-            }
-        });
-    }
-
-    pub(crate) fn stop_system() {
-        RUNNING.with(|cell| cell.set(false));
-    }
-
     /// Spawn a future on the current thread. This does not create a new Arbiter
     /// or Arbiter address, it is simply a helper for spawning futures on the current
     /// thread.
@@ -176,26 +154,12 @@ impl Arbiter {
     where
         F: Future<Output = ()> + 'static,
     {
-        RUNNING.with(move |cell| {
-            if cell.get() {
-                // Spawn the future on running executor
-                let len = PENDING.with(move |cell| {
-                    let mut p = cell.borrow_mut();
-                    p.push(tokio::task::spawn_local(future));
-                    p.len()
-                });
-                if len > 7 {
-                    // Before reaching the inline size
-                    tokio::task::spawn_local(CleanupPending);
-                }
-            } else {
-                // Box the future and push it to the queue, this results in double boxing
-                // because the executor boxes the future again, but works for now
-                Q.with(move |cell| {
-                    cell.borrow_mut().push(Pin::from(Box::alloc().init(future)))
-                });
-            }
-        });
+        // HANDLE.with(|handle| {
+        //     let handle = handle.borrow();
+        //     handle.push(tokio::task::spawn_local(future));
+        // });
+        // let _ = tokio::task::spawn_local(CleanupPending);
+        let _ = tokio::task::spawn_local(future);
     }
 
     /// Executes a future on the current thread. This does not create a new Arbiter
@@ -206,7 +170,9 @@ impl Arbiter {
         F: FnOnce() -> R + 'static,
         R: Future<Output = ()> + 'static,
     {
-        Arbiter::spawn(future::lazy(|_| f()).flatten())
+        Arbiter::spawn(async {
+            f();
+        })
     }
 
     /// Send a future to the Arbiter's thread, and spawn it.
@@ -214,9 +180,7 @@ impl Arbiter {
     where
         F: Future<Output = ()> + Send + Unpin + 'static,
     {
-        let _ = self
-            .sender
-            .unbounded_send(ArbiterCommand::Execute(Box::new(future)));
+        let _ = self.sender.send(ArbiterCommand::Execute(Box::new(future)));
     }
 
     /// Send a function to the Arbiter's thread, and execute it. Any result from the function
@@ -227,7 +191,7 @@ impl Arbiter {
     {
         let _ = self
             .sender
-            .unbounded_send(ArbiterCommand::ExecuteFn(Box::new(move || {
+            .send(ArbiterCommand::ExecuteFn(Box::new(move || {
                 f();
             })));
     }
@@ -243,8 +207,8 @@ impl Arbiter {
         let (tx, rx) = channel();
         let _ = self
             .sender
-            .unbounded_send(ArbiterCommand::ExecuteFn(Box::new(move || {
-                if !tx.is_canceled() {
+            .send(ArbiterCommand::ExecuteFn(Box::new(move || {
+                if !tx.is_closed() {
                     let _ = tx.send(f());
                 }
             })));
@@ -313,40 +277,33 @@ impl Arbiter {
 
     /// Returns a future that will be completed once all currently spawned futures
     /// have completed.
-    pub fn local_join() -> impl Future<Output = ()> {
-        PENDING.with(move |cell| {
-            let current = cell.replace(SmallVec::new());
-            future::join_all(current).map(|_| ())
-        })
+    #[deprecated(since = "1.2.0", note = "Arbiter::local_join function is removed.")]
+    pub async fn local_join() {
+        // let handle = HANDLE.with(|fut| std::mem::take(&mut *fut.borrow_mut()));
+        // async move {
+        //     handle.collect::<Vec<_>>().await;
+        // }
+        unimplemented!("Arbiter::local_join function is removed.")
     }
 }
 
-/// Future used for cleaning-up already finished `JoinHandle`s
-/// from the `PENDING` list so the vector doesn't grow indefinitely
-struct CleanupPending;
-
-impl Future for CleanupPending {
-    type Output = ();
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        PENDING.with(move |cell| {
-            let mut pending = cell.borrow_mut();
-            let mut i = 0;
-            while i != pending.len() {
-                if let Poll::Ready(_) = Pin::new(&mut pending[i]).poll(cx) {
-                    pending.remove(i);
-                } else {
-                    i += 1;
-                }
-            }
-        });
-
-        Poll::Ready(())
-    }
-}
+// /// Future used for cleaning-up already finished `JoinHandle`s
+// /// from the `PENDING` list so the vector doesn't grow indefinitely
+// struct CleanupPending;
+//
+// impl Future for CleanupPending {
+//     type Output = ();
+//
+//     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+//         HANDLE.with(move |handle| {
+//             recycle_join_handle(&mut *handle.borrow_mut(), cx);
+//         });
+//
+//         Poll::Ready(())
+//     }
+// }
 
 struct ArbiterController {
-    stop: Option<Sender<i32>>,
     rx: UnboundedReceiver<ArbiterCommand>,
 }
 
@@ -368,25 +325,17 @@ impl Future for ArbiterController {
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         loop {
-            match Pin::new(&mut self.rx).poll_next(cx) {
+            match Pin::new(&mut self.rx).poll_recv(cx) {
                 Poll::Ready(None) => return Poll::Ready(()),
                 Poll::Ready(Some(item)) => match item {
-                    ArbiterCommand::Stop => {
-                        if let Some(stop) = self.stop.take() {
-                            let _ = stop.send(0);
-                        };
-                        return Poll::Ready(());
-                    }
+                    ArbiterCommand::Stop => return Poll::Ready(()),
                     ArbiterCommand::Execute(fut) => {
-                        let len = PENDING.with(move |cell| {
-                            let mut p = cell.borrow_mut();
-                            p.push(tokio::task::spawn_local(fut));
-                            p.len()
-                        });
-                        if len > 7 {
-                            // Before reaching the inline size
-                            tokio::task::spawn_local(CleanupPending);
-                        }
+                        // HANDLE.with(|handle| {
+                        //     let mut handle = handle.borrow_mut();
+                        //     handle.push(tokio::task::spawn_local(fut));
+                        //     recycle_join_handle(&mut *handle, cx);
+                        // });
+                        tokio::task::spawn_local(fut);
                     }
                     ArbiterCommand::ExecuteFn(f) => {
                         f.call_box();
@@ -398,6 +347,20 @@ impl Future for ArbiterController {
     }
 }
 
+// fn recycle_join_handle(handle: &mut FuturesUnordered<JoinHandle<()>>, cx: &mut Context<'_>) {
+//     let _ = Pin::new(&mut *handle).poll_next(cx);
+//
+//     // Try to recycle more join handles and free up memory.
+//     //
+//     // this is a guess. The yield limit for FuturesUnordered is 32.
+//     // So poll an extra 3 times would make the total poll below 128.
+//     if handle.len() > 64 {
+//         (0..3).for_each(|_| {
+//             let _ = Pin::new(&mut *handle).poll_next(cx);
+//         })
+//     }
+// }
+
 #[derive(Debug)]
 pub(crate) enum SystemCommand {
     Exit(i32),
@@ -427,7 +390,7 @@ impl Future for SystemArbiter {
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         loop {
-            match Pin::new(&mut self.commands).poll_next(cx) {
+            match Pin::new(&mut self.commands).poll_recv(cx) {
                 Poll::Ready(None) => return Poll::Ready(()),
                 Poll::Ready(Some(cmd)) => match cmd {
                     SystemCommand::Exit(code) => {

actix-rt/src/builder.rs

@@ -1,9 +1,9 @@
 use std::borrow::Cow;
+use std::future::Future;
 use std::io;
 
-use futures_channel::mpsc::unbounded;
-use futures_channel::oneshot::{channel, Receiver};
-use futures_util::future::{lazy, Future, FutureExt};
+use tokio::sync::mpsc::unbounded_channel;
+use tokio::sync::oneshot::{channel, Receiver};
 use tokio::task::LocalSet;
 
 use crate::arbiter::{Arbiter, SystemArbiter};
@@ -65,16 +65,17 @@ impl Builder {
     /// Function `f` get called within tokio runtime context.
     pub fn run<F>(self, f: F) -> io::Result<()>
     where
-        F: FnOnce() + 'static,
+        F: FnOnce(),
     {
         self.create_runtime(f).run()
     }
 
     fn create_async_runtime(self, local: &LocalSet) -> AsyncSystemRunner {
         let (stop_tx, stop) = channel();
-        let (sys_sender, sys_receiver) = unbounded();
+        let (sys_sender, sys_receiver) = unbounded_channel();
 
-        let system = System::construct(sys_sender, Arbiter::new_system(), self.stop_on_panic);
+        let system =
+            System::construct(sys_sender, Arbiter::new_system(local), self.stop_on_panic);
 
         // system arbiter
         let arb = SystemArbiter::new(stop_tx, sys_receiver);
@@ -87,21 +88,26 @@ impl Builder {
 
     fn create_runtime<F>(self, f: F) -> SystemRunner
     where
-        F: FnOnce() + 'static,
+        F: FnOnce(),
     {
         let (stop_tx, stop) = channel();
-        let (sys_sender, sys_receiver) = unbounded();
+        let (sys_sender, sys_receiver) = unbounded_channel();
 
-        let system = System::construct(sys_sender, Arbiter::new_system(), self.stop_on_panic);
+        let rt = Runtime::new().unwrap();
+
+        let system = System::construct(
+            sys_sender,
+            Arbiter::new_system(rt.local()),
+            self.stop_on_panic,
+        );
 
         // system arbiter
         let arb = SystemArbiter::new(stop_tx, sys_receiver);
 
-        let mut rt = Runtime::new().unwrap();
         rt.spawn(arb);
 
         // init system arbiter and run configuration method
-        rt.block_on(lazy(move |_| f()));
+        rt.block_on(async { f() });
 
         SystemRunner { rt, stop, system }
     }
@@ -120,27 +126,21 @@ impl AsyncSystemRunner {
         let AsyncSystemRunner { stop, .. } = self;
 
         // run loop
-        lazy(|_| {
-            Arbiter::run_system(None);
-            async {
-                let res = match stop.await {
-                    Ok(code) => {
-                        if code != 0 {
-                            Err(io::Error::new(
-                                io::ErrorKind::Other,
-                                format!("Non-zero exit code: {}", code),
-                            ))
-                        } else {
-                            Ok(())
-                        }
+        async {
+            match stop.await {
+                Ok(code) => {
+                    if code != 0 {
+                        Err(io::Error::new(
+                            io::ErrorKind::Other,
+                            format!("Non-zero exit code: {}", code),
+                        ))
+                    } else {
+                        Ok(())
                     }
-                    Err(e) => Err(io::Error::new(io::ErrorKind::Other, e)),
-                };
-                Arbiter::stop_system();
-                res
+                }
+                Err(e) => Err(io::Error::new(io::ErrorKind::Other, e)),
             }
-        })
-        .flatten()
+        }
     }
 }
 
@@ -157,11 +157,10 @@ impl SystemRunner {
     /// This function will start event loop and will finish once the
     /// `System::stop()` function is called.
     pub fn run(self) -> io::Result<()> {
-        let SystemRunner { mut rt, stop, .. } = self;
+        let SystemRunner { rt, stop, .. } = self;
 
         // run loop
-        Arbiter::run_system(Some(&rt));
-        let result = match rt.block_on(stop) {
+        match rt.block_on(stop) {
             Ok(code) => {
                 if code != 0 {
                     Err(io::Error::new(
@@ -173,19 +172,12 @@ impl SystemRunner {
                 }
             }
             Err(e) => Err(io::Error::new(io::ErrorKind::Other, e)),
-        };
-        Arbiter::stop_system();
-        result
+        }
     }
 
     /// Execute a future and wait for result.
-    pub fn block_on<F, O>(&mut self, fut: F) -> O
-    where
-        F: Future<Output = O> + 'static,
-    {
-        Arbiter::run_system(Some(&self.rt));
-        let res = self.rt.block_on(fut);
-        Arbiter::stop_system();
-        res
+    #[inline]
+    pub fn block_on<F: Future>(&self, fut: F) -> F::Output {
+        self.rt.block_on(fut)
     }
 }

actix-rt/src/lib.rs

@@ -1,6 +1,11 @@
-//! A runtime implementation that runs everything on the current thread.
-#![deny(rust_2018_idioms, warnings)]
+//! Tokio-based single-thread async runtime for the Actix ecosystem.
+
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
+use std::future::Future;
 
 #[cfg(not(test))] // Work around for rust-lang/rust#62127
 pub use actix_macros::{main, test};
@@ -20,15 +25,12 @@ pub use self::system::System;
 /// # Panics
 ///
 /// This function panics if actix system is not running.
+#[inline]
 pub fn spawn<F>(f: F)
 where
-    F: futures_util::future::Future<Output = ()> + 'static,
+    F: Future<Output = ()> + 'static,
 {
-    if !System::is_set() {
-        panic!("System is not running");
-    }
-
-    Arbiter::spawn(f);
+    Arbiter::spawn(f)
 }
 
 /// Asynchronous signal handling
@@ -57,7 +59,7 @@ pub mod net {
 /// Utilities for tracking time.
 pub mod time {
     pub use tokio::time::Instant;
-    pub use tokio::time::{delay_for, delay_until, Delay};
     pub use tokio::time::{interval, interval_at, Interval};
+    pub use tokio::time::{sleep, sleep_until, Sleep};
     pub use tokio::time::{timeout, Timeout};
 }

actix-rt/src/runtime.rs

@@ -7,7 +7,7 @@ use tokio::{runtime, task::LocalSet};
 ///
 /// See [module level][mod] documentation for more details.
 ///
-/// [mod]: index.html
+/// [mod]: crate
 #[derive(Debug)]
 pub struct Runtime {
     local: LocalSet,
@@ -18,10 +18,9 @@ impl Runtime {
     #[allow(clippy::new_ret_no_self)]
     /// Returns a new runtime initialized with default configuration values.
     pub fn new() -> io::Result<Runtime> {
-        let rt = runtime::Builder::new()
+        let rt = runtime::Builder::new_current_thread()
             .enable_io()
             .enable_time()
-            .basic_scheduler()
             .build()?;
 
         Ok(Runtime {
@@ -30,11 +29,15 @@ impl Runtime {
         })
     }
 
+    pub(super) fn local(&self) -> &LocalSet {
+        &self.local
+    }
+
     /// Spawn a future onto the single-threaded runtime.
     ///
     /// See [module level][mod] documentation for more details.
     ///
-    /// [mod]: index.html
+    /// [mod]: crate
     ///
     /// # Examples
     ///
@@ -44,7 +47,7 @@ impl Runtime {
     ///
     /// # fn dox() {
     /// // Create the runtime
-    /// let mut rt = Runtime::new().unwrap();
+    /// let rt = Runtime::new().unwrap();
     ///
     /// // Spawn a future onto the runtime
     /// rt.spawn(future::lazy(|_| {
@@ -82,10 +85,10 @@ impl Runtime {
     ///
     /// The caller is responsible for ensuring that other spawned futures
     /// complete execution by calling `block_on` or `run`.
-    pub fn block_on<F>(&mut self, f: F) -> F::Output
+    pub fn block_on<F>(&self, f: F) -> F::Output
     where
-        F: Future + 'static,
+        F: Future,
     {
-        self.local.block_on(&mut self.rt, f)
+        self.local.block_on(&self.rt, f)
     }
 }

actix-rt/src/system.rs

@@ -3,7 +3,7 @@ use std::future::Future;
 use std::io;
 use std::sync::atomic::{AtomicUsize, Ordering};
 
-use futures_channel::mpsc::UnboundedSender;
+use tokio::sync::mpsc::UnboundedSender;
 use tokio::task::LocalSet;
 
 use crate::arbiter::{Arbiter, SystemCommand};
@@ -66,12 +66,11 @@ impl System {
     /// It means that using this method currently it is impossible to make `actix-rt` work in the
     /// alternative `tokio` `Runtime`s (e.g. provided by [`tokio_compat`]).
     ///
-    /// [`Arbiter`]: struct.Arbiter.html
     /// [`tokio_compat`]: https://crates.io/crates/tokio-compat
     ///
     /// # Examples
     ///
-    /// ```
+    /// ```rust,ignore
     /// use tokio::{runtime::Runtime, task::LocalSet};
     /// use actix_rt::System;
     /// use futures_util::future::try_join_all;
@@ -95,10 +94,9 @@ impl System {
     /// }
     ///
     ///
-    /// let mut runtime = tokio::runtime::Builder::new()
-    ///     .core_threads(2)
+    /// let runtime = tokio::runtime::Builder::new_multi_thread()
+    ///     .worker_threads(2)
     ///     .enable_all()
-    ///     .threaded_scheduler()
     ///     .build()
     ///     .unwrap();
     ///
@@ -131,7 +129,6 @@ impl System {
     /// It means that using this method currently it is impossible to make `actix-rt` work in the
     /// alternative `tokio` `Runtime`s (e.g. provided by `tokio_compat`).
     ///
-    /// [`Arbiter`]: struct.Arbiter.html
     /// [`tokio_compat`]: https://crates.io/crates/tokio-compat
     ///
     /// # Arguments
@@ -142,7 +139,7 @@ impl System {
     ///
     /// # Examples
     ///
-    /// ```
+    /// ```rust,ignore
     /// use tokio::runtime::Runtime;
     /// use actix_rt::System;
     /// use futures_util::future::try_join_all;
@@ -166,10 +163,9 @@ impl System {
     /// }
     ///
     ///
-    /// let runtime = tokio::runtime::Builder::new()
-    ///     .core_threads(2)
+    /// let runtime = tokio::runtime::Builder::new_multi_thread()
+    ///     .worker_threads(2)
     ///     .enable_all()
-    ///     .threaded_scheduler()
     ///     .build()
     ///     .unwrap();
     ///
@@ -178,7 +174,7 @@ impl System {
     /// ```
     pub fn attach_to_tokio<Fut, R>(
         name: impl Into<String>,
-        mut runtime: tokio::runtime::Runtime,
+        runtime: tokio::runtime::Runtime,
         rest_operations: Fut,
     ) -> R
     where
@@ -235,7 +231,7 @@ impl System {
 
     /// Stop the system with a particular exit code.
     pub fn stop_with_code(&self, code: i32) {
-        let _ = self.sys.unbounded_send(SystemCommand::Exit(code));
+        let _ = self.sys.send(SystemCommand::Exit(code));
     }
 
     pub(crate) fn sys(&self) -> &UnboundedSender<SystemCommand> {
@@ -258,7 +254,7 @@ impl System {
     /// Function `f` get called within tokio runtime context.
     pub fn run<F>(f: F) -> io::Result<()>
     where
-        F: FnOnce() + 'static,
+        F: FnOnce(),
     {
         Self::builder().run(f)
     }

actix-rt/tests/integration_tests.rs

@@ -1,25 +1,11 @@
 use std::time::{Duration, Instant};
 
-#[test]
-fn start_and_stop() {
-    actix_rt::System::new("start_and_stop").block_on(async move {
-        assert!(
-            actix_rt::Arbiter::is_running(),
-            "System doesn't seem to have started"
-        );
-    });
-    assert!(
-        !actix_rt::Arbiter::is_running(),
-        "System doesn't seem to have stopped"
-    );
-}
-
 #[test]
 fn await_for_timer() {
     let time = Duration::from_secs(2);
     let instant = Instant::now();
     actix_rt::System::new("test_wait_timer").block_on(async move {
-        tokio::time::delay_for(time).await;
+        tokio::time::sleep(time).await;
     });
     assert!(
         instant.elapsed() >= time,
@@ -34,7 +20,7 @@ fn join_another_arbiter() {
     actix_rt::System::new("test_join_another_arbiter").block_on(async move {
         let mut arbiter = actix_rt::Arbiter::new();
         arbiter.send(Box::pin(async move {
-            tokio::time::delay_for(time).await;
+            tokio::time::sleep(time).await;
             actix_rt::Arbiter::current().stop();
         }));
         arbiter.join().unwrap();
@@ -49,7 +35,7 @@ fn join_another_arbiter() {
         let mut arbiter = actix_rt::Arbiter::new();
         arbiter.exec_fn(move || {
             actix_rt::spawn(async move {
-                tokio::time::delay_for(time).await;
+                tokio::time::sleep(time).await;
                 actix_rt::Arbiter::current().stop();
             });
         });
@@ -64,7 +50,7 @@ fn join_another_arbiter() {
     actix_rt::System::new("test_join_another_arbiter").block_on(async move {
         let mut arbiter = actix_rt::Arbiter::new();
         arbiter.send(Box::pin(async move {
-            tokio::time::delay_for(time).await;
+            tokio::time::sleep(time).await;
             actix_rt::Arbiter::current().stop();
         }));
         arbiter.stop();
@@ -76,39 +62,65 @@ fn join_another_arbiter() {
     );
 }
 
+// #[test]
+// fn join_current_arbiter() {
+//     let time = Duration::from_secs(2);
+//
+//     let instant = Instant::now();
+//     actix_rt::System::new("test_join_current_arbiter").block_on(async move {
+//         actix_rt::spawn(async move {
+//             tokio::time::delay_for(time).await;
+//             actix_rt::Arbiter::current().stop();
+//         });
+//         actix_rt::Arbiter::local_join().await;
+//     });
+//     assert!(
+//         instant.elapsed() >= time,
+//         "Join on current arbiter should wait for all spawned futures"
+//     );
+//
+//     let large_timer = Duration::from_secs(20);
+//     let instant = Instant::now();
+//     actix_rt::System::new("test_join_current_arbiter").block_on(async move {
+//         actix_rt::spawn(async move {
+//             tokio::time::delay_for(time).await;
+//             actix_rt::Arbiter::current().stop();
+//         });
+//         let f = actix_rt::Arbiter::local_join();
+//         actix_rt::spawn(async move {
+//             tokio::time::delay_for(large_timer).await;
+//             actix_rt::Arbiter::current().stop();
+//         });
+//         f.await;
+//     });
+//     assert!(
+//         instant.elapsed() < large_timer,
+//         "local_join should await only for the already spawned futures"
+//     );
+// }
+
 #[test]
-fn join_current_arbiter() {
-    let time = Duration::from_secs(2);
+fn non_static_block_on() {
+    let string = String::from("test_str");
+    let str = string.as_str();
 
-    let instant = Instant::now();
-    actix_rt::System::new("test_join_current_arbiter").block_on(async move {
-        actix_rt::spawn(async move {
-            tokio::time::delay_for(time).await;
-            actix_rt::Arbiter::current().stop();
-        });
-        actix_rt::Arbiter::local_join().await;
-    });
-    assert!(
-        instant.elapsed() >= time,
-        "Join on current arbiter should wait for all spawned futures"
-    );
+    let sys = actix_rt::System::new("borrow some");
 
-    let large_timer = Duration::from_secs(20);
-    let instant = Instant::now();
-    actix_rt::System::new("test_join_current_arbiter").block_on(async move {
-        actix_rt::spawn(async move {
-            tokio::time::delay_for(time).await;
-            actix_rt::Arbiter::current().stop();
-        });
-        let f = actix_rt::Arbiter::local_join();
-        actix_rt::spawn(async move {
-            tokio::time::delay_for(large_timer).await;
-            actix_rt::Arbiter::current().stop();
-        });
-        f.await;
+    sys.block_on(async {
+        actix_rt::time::sleep(Duration::from_millis(1)).await;
+        assert_eq!("test_str", str);
     });
-    assert!(
-        instant.elapsed() < large_timer,
-        "local_join should await only for the already spawned futures"
-    );
+
+    let rt = actix_rt::Runtime::new().unwrap();
+
+    rt.block_on(async {
+        actix_rt::time::sleep(Duration::from_millis(1)).await;
+        assert_eq!("test_str", str);
+    });
+
+    actix_rt::System::run(|| {
+        assert_eq!("test_str", str);
+        actix_rt::System::current().stop();
+    })
+    .unwrap();
 }

actix-server/CHANGES.md

@@ -1,7 +1,22 @@
 # Changes
 
 ## Unreleased - 2020-xx-xx
+
+
+## 2.0.0-beta.1 - 2020-12-28
 * Added explicit info log message on accept queue pause. [#215]
+* Prevent double registration of sockets when back-pressure is resolved. [#223]
+* Update `mio` dependency to `0.7.3`. [#239]
+* Remove `socket2` dependency. [#239]
+* `ServerBuilder::backlog` now accepts `u32` instead of `i32`. [#239]
+* Remove `AcceptNotify` type and pass `WakerQueue` to `Worker` to wake up `Accept`'s `Poll`. [#239]
+* Convert `mio::net::TcpStream` to `actix_rt::net::TcpStream`(`UnixStream` for uds) using
+  `FromRawFd` and `IntoRawFd`(`FromRawSocket` and `IntoRawSocket` on windows). [#239]
+* Remove `AsyncRead` and `AsyncWrite` trait bound for `socket::FromStream` trait. [#239]
+
+[#215]: https://github.com/actix/actix-net/pull/215
+[#223]: https://github.com/actix/actix-net/pull/223
+[#239]: https://github.com/actix/actix-net/pull/239
 
 
 ## 1.0.4 - 2020-09-12

actix-server/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "actix-server"
-version = "1.0.4"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+version = "2.0.0-beta.1"
+authors = [
+    "Nikolay Kim <fafhrd91@gmail.com>",
+    "fakeshadow <24548779@qq.com>",
+]
 description = "General purpose TCP server built for the Actix ecosystem"
 keywords = ["network", "framework", "async", "futures"]
 homepage = "https://actix.rs"
@@ -20,25 +23,21 @@ path = "src/lib.rs"
 default = []
 
 [dependencies]
-actix-service = "1.0.6"
-actix-rt = "1.1.1"
-actix-codec = "0.3.0"
-actix-utils = "2.0.0"
+actix-codec = "0.4.0-beta.1"
+actix-rt = "2.0.0-beta.1"
+actix-service = "2.0.0-beta.1"
+actix-utils = "3.0.0-beta.1"
 
+futures-core = { version = "0.3.7", default-features = false }
 log = "0.4"
+mio = { version = "0.7.6", features = ["os-poll", "net"] }
 num_cpus = "1.13"
-mio = "0.6.19"
-socket2 = "0.3"
-futures-channel = { version = "0.3.4", default-features = false }
-futures-util = { version = "0.3.4", default-features = false, features = ["sink"] }
 slab = "0.4"
-
-# unix domain sockets
-# FIXME: Remove it and use mio own uds feature once mio 0.7 is released
-mio-uds = { version = "0.6.7" }
+tokio = { version = "1", features = ["sync"] }
 
 [dev-dependencies]
-bytes = "0.5"
-env_logger = "0.7"
-actix-testing = "1.0.0"
-tokio = { version = "0.2", features = ["io-util"] }
+actix-testing = "2.0.0-beta.1"
+bytes = "1"
+env_logger = "0.8"
+futures-util = { version = "0.3.7", default-features = false, features = ["sink"] }
+tokio = { version = "1", features = ["io-util"] }

actix-server/src/accept.rs

@@ -1,120 +1,86 @@
-use std::sync::mpsc as sync_mpsc;
 use std::time::Duration;
 use std::{io, thread};
 
-use actix_rt::time::{delay_until, Instant};
+use actix_rt::time::{sleep_until, Instant};
 use actix_rt::System;
 use log::{error, info};
+use mio::{Interest, Poll, Token as MioToken};
 use slab::Slab;
 
 use crate::server::Server;
-use crate::socket::{SocketAddr, SocketListener, StdListener};
-use crate::worker::{Conn, WorkerClient};
+use crate::socket::{MioListener, SocketAddr};
+use crate::waker_queue::{WakerInterest, WakerQueue, WAKER_TOKEN};
+use crate::worker::{Conn, WorkerHandle};
 use crate::Token;
 
-pub(crate) enum Command {
-    Pause,
-    Resume,
-    Stop,
-    Worker(WorkerClient),
-}
-
 struct ServerSocketInfo {
+    // addr for socket. mainly used for logging.
     addr: SocketAddr,
+    // be ware this is the crate token for identify socket and should not be confused with
+    // mio::Token
     token: Token,
-    sock: SocketListener,
+    lst: MioListener,
+    // timeout is used to mark the deadline when this socket's listener should be registered again
+    // after an error.
     timeout: Option<Instant>,
 }
 
-#[derive(Clone)]
-pub(crate) struct AcceptNotify(mio::SetReadiness);
-
-impl AcceptNotify {
-    pub(crate) fn new(ready: mio::SetReadiness) -> Self {
-        AcceptNotify(ready)
-    }
-
-    pub(crate) fn notify(&self) {
-        let _ = self.0.set_readiness(mio::Ready::readable());
-    }
-}
-
-impl Default for AcceptNotify {
-    fn default() -> Self {
-        AcceptNotify::new(mio::Registration::new2().1)
-    }
-}
-
+/// Accept loop would live with `ServerBuilder`.
+///
+/// It's tasked with construct `Poll` instance and `WakerQueue` which would be distributed to
+/// `Accept` and `Worker`.
+///
+/// It would also listen to `ServerCommand` and push interests to `WakerQueue`.
 pub(crate) struct AcceptLoop {
-    cmd_reg: Option<mio::Registration>,
-    cmd_ready: mio::SetReadiness,
-    notify_reg: Option<mio::Registration>,
-    notify_ready: mio::SetReadiness,
-    tx: sync_mpsc::Sender<Command>,
-    rx: Option<sync_mpsc::Receiver<Command>>,
     srv: Option<Server>,
+    poll: Option<Poll>,
+    waker: WakerQueue,
 }
 
 impl AcceptLoop {
-    pub fn new(srv: Server) -> AcceptLoop {
-        let (tx, rx) = sync_mpsc::channel();
-        let (cmd_reg, cmd_ready) = mio::Registration::new2();
-        let (notify_reg, notify_ready) = mio::Registration::new2();
+    pub fn new(srv: Server) -> Self {
+        let poll = Poll::new().unwrap_or_else(|e| panic!("Can not create `mio::Poll`: {}", e));
+        let waker = WakerQueue::new(poll.registry())
+            .unwrap_or_else(|e| panic!("Can not create `mio::Waker`: {}", e));
 
-        AcceptLoop {
-            tx,
-            cmd_ready,
-            cmd_reg: Some(cmd_reg),
-            notify_ready,
-            notify_reg: Some(notify_reg),
-            rx: Some(rx),
+        Self {
             srv: Some(srv),
+            poll: Some(poll),
+            waker,
         }
     }
 
-    pub fn send(&self, msg: Command) {
-        let _ = self.tx.send(msg);
-        let _ = self.cmd_ready.set_readiness(mio::Ready::readable());
+    pub(crate) fn waker_owned(&self) -> WakerQueue {
+        self.waker.clone()
     }
 
-    pub fn get_notify(&self) -> AcceptNotify {
-        AcceptNotify::new(self.notify_ready.clone())
+    pub fn wake(&self, i: WakerInterest) {
+        self.waker.wake(i);
     }
 
     pub(crate) fn start(
         &mut self,
-        socks: Vec<(Token, StdListener)>,
-        workers: Vec<WorkerClient>,
+        socks: Vec<(Token, MioListener)>,
+        handles: Vec<WorkerHandle>,
     ) {
         let srv = self.srv.take().expect("Can not re-use AcceptInfo");
+        let poll = self.poll.take().unwrap();
+        let waker = self.waker.clone();
 
-        Accept::start(
-            self.rx.take().expect("Can not re-use AcceptInfo"),
-            self.cmd_reg.take().expect("Can not re-use AcceptInfo"),
-            self.notify_reg.take().expect("Can not re-use AcceptInfo"),
-            socks,
-            srv,
-            workers,
-        );
+        Accept::start(poll, waker, socks, srv, handles);
     }
 }
 
+/// poll instance of the server.
 struct Accept {
-    poll: mio::Poll,
-    rx: sync_mpsc::Receiver<Command>,
-    sockets: Slab<ServerSocketInfo>,
-    workers: Vec<WorkerClient>,
+    poll: Poll,
+    waker: WakerQueue,
+    handles: Vec<WorkerHandle>,
     srv: Server,
-    timer: (mio::Registration, mio::SetReadiness),
     next: usize,
     backpressure: bool,
 }
 
-const DELTA: usize = 100;
-const CMD: mio::Token = mio::Token(0);
-const TIMER: mio::Token = mio::Token(1);
-const NOTIFY: mio::Token = mio::Token(2);
-
 /// This function defines errors that are per-connection. Which basically
 /// means that if we get this error from `accept()` system call it means
 /// next connection might be ready to be accepted.
@@ -129,321 +95,290 @@ fn connection_error(e: &io::Error) -> bool {
 }
 
 impl Accept {
-    #![allow(clippy::too_many_arguments)]
     pub(crate) fn start(
-        rx: sync_mpsc::Receiver<Command>,
-        cmd_reg: mio::Registration,
-        notify_reg: mio::Registration,
-        socks: Vec<(Token, StdListener)>,
+        poll: Poll,
+        waker: WakerQueue,
+        socks: Vec<(Token, MioListener)>,
         srv: Server,
-        workers: Vec<WorkerClient>,
+        handles: Vec<WorkerHandle>,
     ) {
+        // Accept runs in its own thread and would want to spawn additional futures to current
+        // actix system.
         let sys = System::current();
-
-        // start accept thread
-        let _ = thread::Builder::new()
+        thread::Builder::new()
             .name("actix-server accept loop".to_owned())
             .spawn(move || {
                 System::set_current(sys);
-                let mut accept = Accept::new(rx, socks, workers, srv);
-
-                // Start listening for incoming commands
-                if let Err(err) = accept.poll.register(
-                    &cmd_reg,
-                    CMD,
-                    mio::Ready::readable(),
-                    mio::PollOpt::edge(),
-                ) {
-                    panic!("Can not register Registration: {}", err);
-                }
-
-                // Start listening for notify updates
-                if let Err(err) = accept.poll.register(
-                    &notify_reg,
-                    NOTIFY,
-                    mio::Ready::readable(),
-                    mio::PollOpt::edge(),
-                ) {
-                    panic!("Can not register Registration: {}", err);
-                }
-
-                accept.poll();
-            });
+                let (mut accept, sockets) =
+                    Accept::new_with_sockets(poll, waker, socks, handles, srv);
+                accept.poll_with(sockets);
+            })
+            .unwrap();
     }
 
-    fn new(
-        rx: sync_mpsc::Receiver<Command>,
-        socks: Vec<(Token, StdListener)>,
-        workers: Vec<WorkerClient>,
+    fn new_with_sockets(
+        poll: Poll,
+        waker: WakerQueue,
+        socks: Vec<(Token, MioListener)>,
+        handles: Vec<WorkerHandle>,
         srv: Server,
-    ) -> Accept {
-        // Create a poll instance
-        let poll = match mio::Poll::new() {
-            Ok(poll) => poll,
-            Err(err) => panic!("Can not create mio::Poll: {}", err),
-        };
-
-        // Start accept
+    ) -> (Accept, Slab<ServerSocketInfo>) {
         let mut sockets = Slab::new();
-        for (hnd_token, lst) in socks.into_iter() {
+        for (hnd_token, mut lst) in socks.into_iter() {
             let addr = lst.local_addr();
 
-            let server = lst.into_listener();
             let entry = sockets.vacant_entry();
             let token = entry.key();
 
             // Start listening for incoming connections
-            if let Err(err) = poll.register(
-                &server,
-                mio::Token(token + DELTA),
-                mio::Ready::readable(),
-                mio::PollOpt::edge(),
-            ) {
-                panic!("Can not register io: {}", err);
-            }
+            poll.registry()
+                .register(&mut lst, MioToken(token), Interest::READABLE)
+                .unwrap_or_else(|e| panic!("Can not register io: {}", e));
 
             entry.insert(ServerSocketInfo {
                 addr,
                 token: hnd_token,
-                sock: server,
+                lst,
                 timeout: None,
             });
         }
 
-        // Timer
-        let (tm, tmr) = mio::Registration::new2();
-        if let Err(err) =
-            poll.register(&tm, TIMER, mio::Ready::readable(), mio::PollOpt::edge())
-        {
-            panic!("Can not register Registration: {}", err);
-        }
-
-        Accept {
+        let accept = Accept {
             poll,
-            rx,
-            sockets,
-            workers,
+            waker,
+            handles,
             srv,
             next: 0,
-            timer: (tm, tmr),
             backpressure: false,
-        }
+        };
+
+        (accept, sockets)
     }
 
-    fn poll(&mut self) {
-        // Create storage for events
+    fn poll_with(&mut self, mut sockets: Slab<ServerSocketInfo>) {
         let mut events = mio::Events::with_capacity(128);
 
         loop {
-            if let Err(err) = self.poll.poll(&mut events, None) {
-                panic!("Poll error: {}", err);
-            }
+            self.poll
+                .poll(&mut events, None)
+                .unwrap_or_else(|e| panic!("Poll error: {}", e));
 
             for event in events.iter() {
                 let token = event.token();
                 match token {
-                    CMD => {
-                        if !self.process_cmd() {
-                            return;
+                    // This is a loop because interests for command from previous version was
+                    // a loop that would try to drain the command channel. It's yet unknown
+                    // if it's necessary/good practice to actively drain the waker queue.
+                    WAKER_TOKEN => 'waker: loop {
+                        // take guard with every iteration so no new interest can be added
+                        // until the current task is done.
+                        let mut guard = self.waker.guard();
+                        match guard.pop_front() {
+                            // worker notify it becomes available. we may want to recover
+                            // from  backpressure.
+                            Some(WakerInterest::WorkerAvailable) => {
+                                drop(guard);
+                                self.maybe_backpressure(&mut sockets, false);
+                            }
+                            // a new worker thread is made and it's handle would be added
+                            // to Accept
+                            Some(WakerInterest::Worker(handle)) => {
+                                drop(guard);
+                                // maybe we want to recover from a backpressure.
+                                self.maybe_backpressure(&mut sockets, false);
+                                self.handles.push(handle);
+                            }
+                            // got timer interest and it's time to try register socket(s)
+                            // again.
+                            Some(WakerInterest::Timer) => {
+                                drop(guard);
+                                self.process_timer(&mut sockets)
+                            }
+                            Some(WakerInterest::Pause) => {
+                                drop(guard);
+                                sockets.iter_mut().for_each(|(_, info)| {
+                                    match self.deregister(info) {
+                                        Ok(_) => info!(
+                                            "Paused accepting connections on {}",
+                                            info.addr
+                                        ),
+                                        Err(e) => {
+                                            error!("Can not deregister server socket {}", e)
+                                        }
+                                    }
+                                });
+                            }
+                            Some(WakerInterest::Resume) => {
+                                drop(guard);
+                                sockets.iter_mut().for_each(|(token, info)| {
+                                    self.register_logged(token, info);
+                                });
+                            }
+                            Some(WakerInterest::Stop) => {
+                                return self.deregister_all(&mut sockets);
+                            }
+                            // waker queue is drained.
+                            None => {
+                                // Reset the WakerQueue before break so it does not grow
+                                // infinitely.
+                                WakerQueue::reset(&mut guard);
+                                break 'waker;
+                            }
                         }
-                    }
-                    TIMER => self.process_timer(),
-                    NOTIFY => self.backpressure(false),
+                    },
                     _ => {
                         let token = usize::from(token);
-                        if token < DELTA {
-                            continue;
-                        }
-                        self.accept(token - DELTA);
+                        self.accept(&mut sockets, token);
                     }
                 }
             }
         }
     }
 
-    fn process_timer(&mut self) {
+    fn process_timer(&self, sockets: &mut Slab<ServerSocketInfo>) {
         let now = Instant::now();
-        for (token, info) in self.sockets.iter_mut() {
+        sockets.iter_mut().for_each(|(token, info)| {
+            // only the ServerSocketInfo have an associate timeout value was de registered.
             if let Some(inst) = info.timeout.take() {
                 if now > inst {
-                    if let Err(err) = self.poll.register(
-                        &info.sock,
-                        mio::Token(token + DELTA),
-                        mio::Ready::readable(),
-                        mio::PollOpt::edge(),
-                    ) {
-                        error!("Can not register server socket {}", err);
-                    } else {
-                        info!("Resume accepting connections on {}", info.addr);
-                    }
+                    self.register_logged(token, info);
                 } else {
                     info.timeout = Some(inst);
                 }
             }
-        }
-    }
-
-    fn process_cmd(&mut self) -> bool {
-        loop {
-            match self.rx.try_recv() {
-                Ok(cmd) => match cmd {
-                    Command::Pause => {
-                        for (_, info) in self.sockets.iter_mut() {
-                            if let Err(err) = self.poll.deregister(&info.sock) {
-                                error!("Can not deregister server socket {}", err);
-                            } else {
-                                info!("Paused accepting connections on {}", info.addr);
-                            }
-                        }
-                    }
-                    Command::Resume => {
-                        for (token, info) in self.sockets.iter() {
-                            if let Err(err) = self.register(token, info) {
-                                error!("Can not resume socket accept process: {}", err);
-                            } else {
-                                info!(
-                                    "Accepting connections on {} has been resumed",
-                                    info.addr
-                                );
-                            }
-                        }
-                    }
-                    Command::Stop => {
-                        for (_, info) in self.sockets.iter() {
-                            let _ = self.poll.deregister(&info.sock);
-                        }
-                        return false;
-                    }
-                    Command::Worker(worker) => {
-                        self.backpressure(false);
-                        self.workers.push(worker);
-                    }
-                },
-                Err(err) => match err {
-                    sync_mpsc::TryRecvError::Empty => break,
-                    sync_mpsc::TryRecvError::Disconnected => {
-                        for (_, info) in self.sockets.iter() {
-                            let _ = self.poll.deregister(&info.sock);
-                        }
-                        return false;
-                    }
-                },
-            }
-        }
-        true
+        });
     }
 
     #[cfg(not(target_os = "windows"))]
-    fn register(&self, token: usize, info: &ServerSocketInfo) -> io::Result<()> {
-        self.poll.register(
-            &info.sock,
-            mio::Token(token + DELTA),
-            mio::Ready::readable(),
-            mio::PollOpt::edge(),
-        )
+    fn register(&self, token: usize, info: &mut ServerSocketInfo) -> io::Result<()> {
+        self.poll
+            .registry()
+            .register(&mut info.lst, MioToken(token), Interest::READABLE)
     }
 
     #[cfg(target_os = "windows")]
-    fn register(&self, token: usize, info: &ServerSocketInfo) -> io::Result<()> {
+    fn register(&self, token: usize, info: &mut ServerSocketInfo) -> io::Result<()> {
         // On windows, calling register without deregister cause an error.
         // See https://github.com/actix/actix-web/issues/905
         // Calling reregister seems to fix the issue.
         self.poll
-            .register(
-                &info.sock,
-                mio::Token(token + DELTA),
-                mio::Ready::readable(),
-                mio::PollOpt::edge(),
-            )
+            .registry()
+            .register(&mut info.lst, mio::Token(token), Interest::READABLE)
             .or_else(|_| {
-                self.poll.reregister(
-                    &info.sock,
-                    mio::Token(token + DELTA),
-                    mio::Ready::readable(),
-                    mio::PollOpt::edge(),
+                self.poll.registry().reregister(
+                    &mut info.lst,
+                    mio::Token(token),
+                    Interest::READABLE,
                 )
             })
     }
 
-    fn backpressure(&mut self, on: bool) {
+    fn register_logged(&self, token: usize, info: &mut ServerSocketInfo) {
+        match self.register(token, info) {
+            Ok(_) => info!("Resume accepting connections on {}", info.addr),
+            Err(e) => error!("Can not register server socket {}", e),
+        }
+    }
+
+    fn deregister(&self, info: &mut ServerSocketInfo) -> io::Result<()> {
+        self.poll.registry().deregister(&mut info.lst)
+    }
+
+    fn deregister_all(&self, sockets: &mut Slab<ServerSocketInfo>) {
+        sockets.iter_mut().for_each(|(_, info)| {
+            info!("Accepting connections on {} has been paused", info.addr);
+            let _ = self.deregister(info);
+        });
+    }
+
+    fn maybe_backpressure(&mut self, sockets: &mut Slab<ServerSocketInfo>, on: bool) {
         if self.backpressure {
             if !on {
                 self.backpressure = false;
-                for (token, info) in self.sockets.iter() {
-                    if let Err(err) = self.register(token, info) {
-                        error!("Can not resume socket accept process: {}", err);
-                    } else {
-                        info!("Accepting connections on {} has been resumed", info.addr);
+                for (token, info) in sockets.iter_mut() {
+                    if info.timeout.is_some() {
+                        // socket will attempt to re-register itself when its timeout completes
+                        continue;
                     }
+                    self.register_logged(token, info);
                 }
             }
         } else if on {
             self.backpressure = true;
-            for (_, info) in self.sockets.iter() {
-                let _ = self.poll.deregister(&info.sock);
-                info!("Accepting connections on {} has been paused", info.addr);
-            }
+            self.deregister_all(sockets);
         }
     }
 
-    fn accept_one(&mut self, mut msg: Conn) {
+    fn accept_one(&mut self, sockets: &mut Slab<ServerSocketInfo>, mut msg: Conn) {
         if self.backpressure {
-            while !self.workers.is_empty() {
-                match self.workers[self.next].send(msg) {
-                    Ok(_) => (),
+            while !self.handles.is_empty() {
+                match self.handles[self.next].send(msg) {
+                    Ok(_) => {
+                        self.set_next();
+                        break;
+                    }
                     Err(tmp) => {
-                        self.srv.worker_faulted(self.workers[self.next].idx);
+                        // worker lost contact and could be gone. a message is sent to
+                        // `ServerBuilder` future to notify it a new worker should be made.
+                        // after that remove the fault worker.
+                        self.srv.worker_faulted(self.handles[self.next].idx);
                         msg = tmp;
-                        self.workers.swap_remove(self.next);
-                        if self.workers.is_empty() {
+                        self.handles.swap_remove(self.next);
+                        if self.handles.is_empty() {
                             error!("No workers");
                             return;
-                        } else if self.workers.len() <= self.next {
+                        } else if self.handles.len() <= self.next {
                             self.next = 0;
                         }
                         continue;
                     }
                 }
-                self.next = (self.next + 1) % self.workers.len();
-                break;
             }
         } else {
             let mut idx = 0;
-            while idx < self.workers.len() {
+            while idx < self.handles.len() {
                 idx += 1;
-                if self.workers[self.next].available() {
-                    match self.workers[self.next].send(msg) {
+                if self.handles[self.next].available() {
+                    match self.handles[self.next].send(msg) {
                         Ok(_) => {
-                            self.next = (self.next + 1) % self.workers.len();
+                            self.set_next();
                             return;
                         }
+                        // worker lost contact and could be gone. a message is sent to
+                        // `ServerBuilder` future to notify it a new worker should be made.
+                        // after that remove the fault worker and enter backpressure if necessary.
                         Err(tmp) => {
-                            self.srv.worker_faulted(self.workers[self.next].idx);
+                            self.srv.worker_faulted(self.handles[self.next].idx);
                             msg = tmp;
-                            self.workers.swap_remove(self.next);
-                            if self.workers.is_empty() {
+                            self.handles.swap_remove(self.next);
+                            if self.handles.is_empty() {
                                 error!("No workers");
-                                self.backpressure(true);
+                                self.maybe_backpressure(sockets, true);
                                 return;
-                            } else if self.workers.len() <= self.next {
+                            } else if self.handles.len() <= self.next {
                                 self.next = 0;
                             }
                             continue;
                         }
                     }
                 }
-                self.next = (self.next + 1) % self.workers.len();
+                self.set_next();
             }
             // enable backpressure
-            self.backpressure(true);
-            self.accept_one(msg);
+            self.maybe_backpressure(sockets, true);
+            self.accept_one(sockets, msg);
         }
     }
 
-    fn accept(&mut self, token: usize) {
+    // set next worker handle that would accept work.
+    fn set_next(&mut self) {
+        self.next = (self.next + 1) % self.handles.len();
+    }
+
+    fn accept(&mut self, sockets: &mut Slab<ServerSocketInfo>, token: usize) {
         loop {
-            let msg = if let Some(info) = self.sockets.get_mut(token) {
-                match info.sock.accept() {
+            let msg = if let Some(info) = sockets.get_mut(token) {
+                match info.lst.accept() {
                     Ok(Some((io, addr))) => Conn {
                         io,
                         token: info.token,
@@ -453,18 +388,22 @@ impl Accept {
                     Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => return,
                     Err(ref e) if connection_error(e) => continue,
                     Err(e) => {
+                        // deregister listener temporary
                         error!("Error accepting connection: {}", e);
-                        if let Err(err) = self.poll.deregister(&info.sock) {
+                        if let Err(err) = self.deregister(info) {
                             error!("Can not deregister server socket {}", err);
                         }
 
-                        // sleep after error
+                        // sleep after error. write the timeout to socket info as later the poll
+                        // would need it mark which socket and when it's listener should be
+                        // registered.
                         info.timeout = Some(Instant::now() + Duration::from_millis(500));
 
-                        let r = self.timer.1.clone();
+                        // after the sleep a Timer interest is sent to Accept Poll
+                        let waker = self.waker.clone();
                         System::current().arbiter().send(Box::pin(async move {
-                            delay_until(Instant::now() + Duration::from_millis(510)).await;
-                            let _ = r.set_readiness(mio::Ready::readable());
+                            sleep_until(Instant::now() + Duration::from_millis(510)).await;
+                            waker.wake(WakerInterest::Timer);
                         }));
                         return;
                     }
@@ -473,7 +412,7 @@ impl Accept {
                 return;
             };
 
-            self.accept_one(msg);
+            self.accept_one(sockets, msg);
         }
     }
 }

actix-server/src/builder.rs

@@ -1,36 +1,35 @@
+use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 use std::time::Duration;
-use std::{io, mem, net};
+use std::{io, mem};
 
 use actix_rt::net::TcpStream;
-use actix_rt::time::{delay_until, Instant};
+use actix_rt::time::{sleep_until, Instant};
 use actix_rt::{spawn, System};
-use futures_channel::mpsc::{unbounded, UnboundedReceiver};
-use futures_channel::oneshot;
-use futures_util::future::ready;
-use futures_util::stream::FuturesUnordered;
-use futures_util::{future::Future, ready, stream::Stream, FutureExt, StreamExt};
 use log::{error, info};
-use socket2::{Domain, Protocol, Socket, Type};
+use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver};
+use tokio::sync::oneshot;
 
-use crate::accept::{AcceptLoop, AcceptNotify, Command};
+use crate::accept::AcceptLoop;
 use crate::config::{ConfiguredService, ServiceConfig};
 use crate::server::{Server, ServerCommand};
 use crate::service::{InternalServiceFactory, ServiceFactory, StreamNewService};
 use crate::signals::{Signal, Signals};
-use crate::socket::StdListener;
-use crate::worker::{self, Worker, WorkerAvailability, WorkerClient};
-use crate::Token;
+use crate::socket::{MioListener, StdSocketAddr, StdTcpListener, ToSocketAddrs};
+use crate::socket::{MioTcpListener, MioTcpSocket};
+use crate::waker_queue::{WakerInterest, WakerQueue};
+use crate::worker::{self, Worker, WorkerAvailability, WorkerHandle};
+use crate::{join_all, Token};
 
 /// Server builder
 pub struct ServerBuilder {
     threads: usize,
     token: Token,
-    backlog: i32,
-    workers: Vec<(usize, WorkerClient)>,
+    backlog: u32,
+    handles: Vec<(usize, WorkerHandle)>,
     services: Vec<Box<dyn InternalServiceFactory>>,
-    sockets: Vec<(Token, String, StdListener)>,
+    sockets: Vec<(Token, String, MioListener)>,
     accept: AcceptLoop,
     exit: bool,
     shutdown_timeout: Duration,
@@ -49,13 +48,13 @@ impl Default for ServerBuilder {
 impl ServerBuilder {
     /// Create new Server builder instance
     pub fn new() -> ServerBuilder {
-        let (tx, rx) = unbounded();
+        let (tx, rx) = unbounded_channel();
         let server = Server::new(tx);
 
         ServerBuilder {
             threads: num_cpus::get(),
-            token: Token(0),
-            workers: Vec::new(),
+            token: Token::default(),
+            handles: Vec::new(),
             services: Vec::new(),
             sockets: Vec::new(),
             accept: AcceptLoop::new(server.clone()),
@@ -89,7 +88,7 @@ impl ServerBuilder {
     /// Generally set in the 64-2048 range. Default value is 2048.
     ///
     /// This method should be called before `bind()` method call.
-    pub fn backlog(mut self, num: i32) -> Self {
+    pub fn backlog(mut self, num: u32) -> Self {
         self.backlog = num;
         self
     }
@@ -147,7 +146,7 @@ impl ServerBuilder {
             for (name, lst) in cfg.services {
                 let token = self.token.next();
                 srv.stream(token, name.clone(), lst.local_addr()?);
-                self.sockets.push((token, name, StdListener::Tcp(lst)));
+                self.sockets.push((token, name, MioListener::Tcp(lst)));
             }
             self.services.push(Box::new(srv));
         }
@@ -160,7 +159,7 @@ impl ServerBuilder {
     pub fn bind<F, U, N: AsRef<str>>(mut self, name: N, addr: U, factory: F) -> io::Result<Self>
     where
         F: ServiceFactory<TcpStream>,
-        U: net::ToSocketAddrs,
+        U: ToSocketAddrs,
     {
         let sockets = bind_addr(addr, self.backlog)?;
 
@@ -173,12 +172,12 @@ impl ServerBuilder {
                 lst.local_addr()?,
             ));
             self.sockets
-                .push((token, name.as_ref().to_string(), StdListener::Tcp(lst)));
+                .push((token, name.as_ref().to_string(), MioListener::Tcp(lst)));
         }
         Ok(self)
     }
 
-    #[cfg(all(unix))]
+    #[cfg(unix)]
     /// Add new unix domain service to the server.
     pub fn bind_uds<F, U, N>(self, name: N, addr: U, factory: F) -> io::Result<Self>
     where
@@ -186,8 +185,6 @@ impl ServerBuilder {
         N: AsRef<str>,
         U: AsRef<std::path::Path>,
     {
-        use std::os::unix::net::UnixListener;
-
         // The path must not exist when we try to bind.
         // Try to remove it to avoid bind error.
         if let Err(e) = std::fs::remove_file(addr.as_ref()) {
@@ -197,26 +194,27 @@ impl ServerBuilder {
             }
         }
 
-        let lst = UnixListener::bind(addr)?;
+        let lst = crate::socket::StdUnixListener::bind(addr)?;
         self.listen_uds(name, lst, factory)
     }
 
-    #[cfg(all(unix))]
+    #[cfg(unix)]
     /// Add new unix domain service to the server.
     /// Useful when running as a systemd service and
     /// a socket FD can be acquired using the systemd crate.
     pub fn listen_uds<F, N: AsRef<str>>(
         mut self,
         name: N,
-        lst: std::os::unix::net::UnixListener,
+        lst: crate::socket::StdUnixListener,
         factory: F,
     ) -> io::Result<Self>
     where
         F: ServiceFactory<actix_rt::net::UnixStream>,
     {
-        use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+        use std::net::{IpAddr, Ipv4Addr};
+        lst.set_nonblocking(true)?;
         let token = self.token.next();
-        let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+        let addr = StdSocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
         self.services.push(StreamNewService::create(
             name.as_ref().to_string(),
             token,
@@ -224,7 +222,7 @@ impl ServerBuilder {
             addr,
         ));
         self.sockets
-            .push((token, name.as_ref().to_string(), StdListener::Uds(lst)));
+            .push((token, name.as_ref().to_string(), MioListener::from(lst)));
         Ok(self)
     }
 
@@ -232,21 +230,25 @@ impl ServerBuilder {
     pub fn listen<F, N: AsRef<str>>(
         mut self,
         name: N,
-        lst: net::TcpListener,
+        lst: StdTcpListener,
         factory: F,
     ) -> io::Result<Self>
     where
         F: ServiceFactory<TcpStream>,
     {
+        lst.set_nonblocking(true)?;
+        let addr = lst.local_addr()?;
+
         let token = self.token.next();
         self.services.push(StreamNewService::create(
             name.as_ref().to_string(),
             token,
             factory,
-            lst.local_addr()?,
+            addr,
         ));
+
         self.sockets
-            .push((token, name.as_ref().to_string(), StdListener::Tcp(lst)));
+            .push((token, name.as_ref().to_string(), MioListener::from(lst)));
         Ok(self)
     }
 
@@ -263,12 +265,12 @@ impl ServerBuilder {
             info!("Starting {} workers", self.threads);
 
             // start workers
-            let workers = (0..self.threads)
+            let handles = (0..self.threads)
                 .map(|idx| {
-                    let worker = self.start_worker(idx, self.accept.get_notify());
-                    self.workers.push((idx, worker.clone()));
+                    let handle = self.start_worker(idx, self.accept.waker_owned());
+                    self.handles.push((idx, handle.clone()));
 
-                    worker
+                    handle
                 })
                 .collect();
 
@@ -281,12 +283,12 @@ impl ServerBuilder {
                     .into_iter()
                     .map(|t| (t.0, t.2))
                     .collect(),
-                workers,
+                handles,
             );
 
             // handle signals
             if !self.no_signals {
-                Signals::start(self.server.clone()).unwrap();
+                Signals::start(self.server.clone());
             }
 
             // start http server actor
@@ -296,10 +298,9 @@ impl ServerBuilder {
         }
     }
 
-    fn start_worker(&self, idx: usize, notify: AcceptNotify) -> WorkerClient {
-        let avail = WorkerAvailability::new(notify);
-        let services: Vec<Box<dyn InternalServiceFactory>> =
-            self.services.iter().map(|v| v.clone_factory()).collect();
+    fn start_worker(&self, idx: usize, waker: WakerQueue) -> WorkerHandle {
+        let avail = WorkerAvailability::new(waker);
+        let services = self.services.iter().map(|v| v.clone_factory()).collect();
 
         Worker::start(idx, services, avail, self.shutdown_timeout)
     }
@@ -307,11 +308,11 @@ impl ServerBuilder {
     fn handle_cmd(&mut self, item: ServerCommand) {
         match item {
             ServerCommand::Pause(tx) => {
-                self.accept.send(Command::Pause);
+                self.accept.wake(WakerInterest::Pause);
                 let _ = tx.send(());
             }
             ServerCommand::Resume(tx) => {
-                self.accept.send(Command::Resume);
+                self.accept.wake(WakerInterest::Resume);
                 let _ = tx.send(());
             }
             ServerCommand::Signal(sig) => {
@@ -355,50 +356,41 @@ impl ServerBuilder {
                 let exit = self.exit;
 
                 // stop accept thread
-                self.accept.send(Command::Stop);
+                self.accept.wake(WakerInterest::Stop);
                 let notify = std::mem::take(&mut self.notify);
 
                 // stop workers
-                if !self.workers.is_empty() && graceful {
-                    spawn(
-                        self.workers
-                            .iter()
-                            .map(move |worker| worker.1.stop(graceful))
-                            .collect::<FuturesUnordered<_>>()
-                            .collect::<Vec<_>>()
-                            .then(move |_| {
-                                if let Some(tx) = completion {
-                                    let _ = tx.send(());
-                                }
-                                for tx in notify {
-                                    let _ = tx.send(());
-                                }
-                                if exit {
-                                    spawn(
-                                        async {
-                                            delay_until(
-                                                Instant::now() + Duration::from_millis(300),
-                                            )
-                                            .await;
-                                            System::current().stop();
-                                        }
-                                        .boxed(),
-                                    );
-                                }
-                                ready(())
-                            }),
-                    )
+                if !self.handles.is_empty() && graceful {
+                    let iter = self
+                        .handles
+                        .iter()
+                        .map(move |worker| worker.1.stop(graceful))
+                        .collect();
+
+                    let fut = join_all(iter);
+
+                    spawn(async move {
+                        let _ = fut.await;
+                        if let Some(tx) = completion {
+                            let _ = tx.send(());
+                        }
+                        for tx in notify {
+                            let _ = tx.send(());
+                        }
+                        if exit {
+                            spawn(async {
+                                sleep_until(Instant::now() + Duration::from_millis(300)).await;
+                                System::current().stop();
+                            });
+                        }
+                    })
                 } else {
                     // we need to stop system if server was spawned
                     if self.exit {
-                        spawn(
-                            delay_until(Instant::now() + Duration::from_millis(300)).then(
-                                |_| {
-                                    System::current().stop();
-                                    ready(())
-                                },
-                            ),
-                        );
+                        spawn(async {
+                            sleep_until(Instant::now() + Duration::from_millis(300)).await;
+                            System::current().stop();
+                        });
                     }
                     if let Some(tx) = completion {
                         let _ = tx.send(());
@@ -410,9 +402,9 @@ impl ServerBuilder {
             }
             ServerCommand::WorkerFaulted(idx) => {
                 let mut found = false;
-                for i in 0..self.workers.len() {
-                    if self.workers[i].0 == idx {
-                        self.workers.swap_remove(i);
+                for i in 0..self.handles.len() {
+                    if self.handles[i].0 == idx {
+                        self.handles.swap_remove(i);
                         found = true;
                         break;
                     }
@@ -421,10 +413,10 @@ impl ServerBuilder {
                 if found {
                     error!("Worker has died {:?}, restarting", idx);
 
-                    let mut new_idx = self.workers.len();
+                    let mut new_idx = self.handles.len();
                     'found: loop {
-                        for i in 0..self.workers.len() {
-                            if self.workers[i].0 == new_idx {
+                        for i in 0..self.handles.len() {
+                            if self.handles[i].0 == new_idx {
                                 new_idx += 1;
                                 continue 'found;
                             }
@@ -432,9 +424,9 @@ impl ServerBuilder {
                         break;
                     }
 
-                    let worker = self.start_worker(new_idx, self.accept.get_notify());
-                    self.workers.push((new_idx, worker.clone()));
-                    self.accept.send(Command::Worker(worker));
+                    let handle = self.start_worker(new_idx, self.accept.waker_owned());
+                    self.handles.push((new_idx, handle.clone()));
+                    self.accept.wake(WakerInterest::Worker(handle));
                 }
             }
         }
@@ -446,20 +438,18 @@ impl Future for ServerBuilder {
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         loop {
-            match ready!(Pin::new(&mut self.cmd).poll_next(cx)) {
-                Some(it) => self.as_mut().get_mut().handle_cmd(it),
-                None => {
-                    return Poll::Pending;
-                }
+            match Pin::new(&mut self.cmd).poll_recv(cx) {
+                Poll::Ready(Some(it)) => self.as_mut().get_mut().handle_cmd(it),
+                _ => return Poll::Pending,
             }
         }
     }
 }
 
-pub(super) fn bind_addr<S: net::ToSocketAddrs>(
+pub(super) fn bind_addr<S: ToSocketAddrs>(
     addr: S,
-    backlog: i32,
-) -> io::Result<Vec<net::TcpListener>> {
+    backlog: u32,
+) -> io::Result<Vec<MioTcpListener>> {
     let mut err = None;
     let mut succ = false;
     let mut sockets = Vec::new();
@@ -487,14 +477,13 @@ pub(super) fn bind_addr<S: net::ToSocketAddrs>(
     }
 }
 
-fn create_tcp_listener(addr: net::SocketAddr, backlog: i32) -> io::Result<net::TcpListener> {
-    let domain = match addr {
-        net::SocketAddr::V4(_) => Domain::ipv4(),
-        net::SocketAddr::V6(_) => Domain::ipv6(),
+fn create_tcp_listener(addr: StdSocketAddr, backlog: u32) -> io::Result<MioTcpListener> {
+    let socket = match addr {
+        StdSocketAddr::V4(_) => MioTcpSocket::new_v4()?,
+        StdSocketAddr::V6(_) => MioTcpSocket::new_v6()?,
     };
-    let socket = Socket::new(domain, Type::stream(), Some(Protocol::tcp()))?;
-    socket.set_reuse_address(true)?;
-    socket.bind(&addr.into())?;
-    socket.listen(backlog)?;
-    Ok(socket.into_tcp_listener())
+
+    socket.set_reuseaddr(true)?;
+    socket.bind(addr)?;
+    socket.listen(backlog)
 }

actix-server/src/config.rs

@@ -1,27 +1,30 @@
 use std::collections::HashMap;
-use std::{fmt, io, net};
+use std::future::Future;
+use std::{fmt, io};
 
 use actix_rt::net::TcpStream;
-use actix_service as actix;
+use actix_service::{
+    fn_service, IntoServiceFactory as IntoBaseServiceFactory,
+    ServiceFactory as BaseServiceFactory,
+};
 use actix_utils::counter::CounterGuard;
-use futures_util::future::{ok, Future, FutureExt, LocalBoxFuture};
+use futures_core::future::LocalBoxFuture;
 use log::error;
 
-use super::builder::bind_addr;
-use super::service::{
-    BoxedServerService, InternalServiceFactory, ServerMessage, StreamService,
-};
-use super::Token;
+use crate::builder::bind_addr;
+use crate::service::{BoxedServerService, InternalServiceFactory, StreamService};
+use crate::socket::{MioStream, MioTcpListener, StdSocketAddr, StdTcpListener, ToSocketAddrs};
+use crate::{ready, Token};
 
 pub struct ServiceConfig {
-    pub(crate) services: Vec<(String, net::TcpListener)>,
+    pub(crate) services: Vec<(String, MioTcpListener)>,
     pub(crate) apply: Option<Box<dyn ServiceRuntimeConfiguration>>,
     pub(crate) threads: usize,
-    pub(crate) backlog: i32,
+    pub(crate) backlog: u32,
 }
 
 impl ServiceConfig {
-    pub(super) fn new(threads: usize, backlog: i32) -> ServiceConfig {
+    pub(super) fn new(threads: usize, backlog: u32) -> ServiceConfig {
         ServiceConfig {
             threads,
             backlog,
@@ -41,24 +44,20 @@ impl ServiceConfig {
     /// Add new service to server
     pub fn bind<U, N: AsRef<str>>(&mut self, name: N, addr: U) -> io::Result<&mut Self>
     where
-        U: net::ToSocketAddrs,
+        U: ToSocketAddrs,
     {
         let sockets = bind_addr(addr, self.backlog)?;
 
         for lst in sockets {
-            self.listen(name.as_ref(), lst);
+            self._listen(name.as_ref(), lst);
         }
 
         Ok(self)
     }
 
     /// Add new service to server
-    pub fn listen<N: AsRef<str>>(&mut self, name: N, lst: net::TcpListener) -> &mut Self {
-        if self.apply.is_none() {
-            self.apply = Some(Box::new(not_configured));
-        }
-        self.services.push((name.as_ref().to_string(), lst));
-        self
+    pub fn listen<N: AsRef<str>>(&mut self, name: N, lst: StdTcpListener) -> &mut Self {
+        self._listen(name, MioTcpListener::from_std(lst))
     }
 
     /// Register service configuration function. This function get called
@@ -70,11 +69,19 @@ impl ServiceConfig {
         self.apply = Some(Box::new(f));
         Ok(())
     }
+
+    fn _listen<N: AsRef<str>>(&mut self, name: N, lst: MioTcpListener) -> &mut Self {
+        if self.apply.is_none() {
+            self.apply = Some(Box::new(not_configured));
+        }
+        self.services.push((name.as_ref().to_string(), lst));
+        self
+    }
 }
 
 pub(super) struct ConfiguredService {
     rt: Box<dyn ServiceRuntimeConfiguration>,
-    names: HashMap<Token, (String, net::SocketAddr)>,
+    names: HashMap<Token, (String, StdSocketAddr)>,
     topics: HashMap<String, Token>,
     services: Vec<Token>,
 }
@@ -89,7 +96,7 @@ impl ConfiguredService {
         }
     }
 
-    pub(super) fn stream(&mut self, token: Token, name: String, addr: net::SocketAddr) {
+    pub(super) fn stream(&mut self, token: Token, name: String, addr: StdSocketAddr) {
         self.names.insert(token, (name.clone(), addr));
         self.topics.insert(name, token);
         self.services.push(token);
@@ -119,7 +126,7 @@ impl InternalServiceFactory for ConfiguredService {
         let tokens = self.services.clone();
 
         // construct services
-        async move {
+        Box::pin(async move {
             let mut services = rt.services;
             // TODO: Proper error handling here
             for f in rt.onstart.into_iter() {
@@ -142,18 +149,15 @@ impl InternalServiceFactory for ConfiguredService {
                     let name = names.remove(&token).unwrap().0;
                     res.push((
                         token,
-                        Box::new(StreamService::new(actix::fn_service(
-                            move |_: TcpStream| {
-                                error!("Service {:?} is not configured", name);
-                                ok::<_, ()>(())
-                            },
-                        ))),
+                        Box::new(StreamService::new(fn_service(move |_: TcpStream| {
+                            error!("Service {:?} is not configured", name);
+                            ready::<Result<_, ()>>(Ok(()))
+                        }))),
                     ));
                 };
             }
             Ok(res)
-        }
-        .boxed_local()
+        })
     }
 }
 
@@ -209,8 +213,8 @@ impl ServiceRuntime {
     /// *ServiceConfig::bind()* or *ServiceConfig::listen()* methods.
     pub fn service<T, F>(&mut self, name: &str, service: F)
     where
-        F: actix::IntoServiceFactory<T>,
-        T: actix::ServiceFactory<Config = (), Request = TcpStream> + 'static,
+        F: IntoBaseServiceFactory<T, TcpStream>,
+        T: BaseServiceFactory<TcpStream, Config = ()> + 'static,
         T::Future: 'static,
         T::Service: 'static,
         T::InitError: fmt::Debug,
@@ -233,13 +237,13 @@ impl ServiceRuntime {
     where
         F: Future<Output = ()> + 'static,
     {
-        self.onstart.push(fut.boxed_local())
+        self.onstart.push(Box::pin(fut))
     }
 }
 
 type BoxedNewService = Box<
-    dyn actix::ServiceFactory<
-        Request = (Option<CounterGuard>, ServerMessage),
+    dyn BaseServiceFactory<
+        (Option<CounterGuard>, MioStream),
         Response = (),
         Error = (),
         InitError = (),
@@ -253,25 +257,24 @@ struct ServiceFactory<T> {
     inner: T,
 }
 
-impl<T> actix::ServiceFactory for ServiceFactory<T>
+impl<T> BaseServiceFactory<(Option<CounterGuard>, MioStream)> for ServiceFactory<T>
 where
-    T: actix::ServiceFactory<Config = (), Request = TcpStream>,
+    T: BaseServiceFactory<TcpStream, Config = ()>,
     T::Future: 'static,
     T::Service: 'static,
     T::Error: 'static,
     T::InitError: fmt::Debug + 'static,
 {
-    type Request = (Option<CounterGuard>, ServerMessage);
     type Response = ();
     type Error = ();
-    type InitError = ();
     type Config = ();
     type Service = BoxedServerService;
+    type InitError = ();
     type Future = LocalBoxFuture<'static, Result<BoxedServerService, ()>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
         let fut = self.inner.new_service(());
-        async move {
+        Box::pin(async move {
             match fut.await {
                 Ok(s) => Ok(Box::new(StreamService::new(s)) as BoxedServerService),
                 Err(e) => {
@@ -279,7 +282,6 @@ where
                     Err(())
                 }
             }
-        }
-        .boxed_local()
+        })
     }
 }

actix-server/src/lib.rs

@@ -1,6 +1,8 @@
 //! General purpose TCP server.
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 mod accept;
 mod builder;
@@ -9,6 +11,7 @@ mod server;
 mod service;
 mod signals;
 mod socket;
+mod waker_queue;
 mod worker;
 
 pub use self::builder::ServerBuilder;
@@ -19,11 +22,25 @@ pub use self::service::ServiceFactory;
 #[doc(hidden)]
 pub use self::socket::FromStream;
 
+use std::future::Future;
+use std::pin::Pin;
+use std::task::{Context, Poll};
+
 /// Socket ID token
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub(crate) struct Token(usize);
 
+impl Default for Token {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Token {
+    fn new() -> Self {
+        Self(0)
+    }
+
     pub(crate) fn next(&mut self) -> Token {
         let token = Token(self.0);
         self.0 += 1;
@@ -35,3 +52,90 @@ impl Token {
 pub fn new() -> ServerBuilder {
     ServerBuilder::default()
 }
+
+// temporary Ready type for std::future::{ready, Ready}; Can be removed when MSRV surpass 1.48
+#[doc(hidden)]
+pub struct Ready<T>(Option<T>);
+
+pub(crate) fn ready<T>(t: T) -> Ready<T> {
+    Ready(Some(t))
+}
+
+impl<T> Unpin for Ready<T> {}
+
+impl<T> Future for Ready<T> {
+    type Output = T;
+
+    fn poll(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
+        Poll::Ready(self.get_mut().0.take().unwrap())
+    }
+}
+
+// a poor man's join future. joined future is only used when starting/stopping the server.
+// pin_project and pinned futures are overkill for this task.
+pub(crate) struct JoinAll<T> {
+    fut: Vec<JoinFuture<T>>,
+}
+
+pub(crate) fn join_all<T>(fut: Vec<impl Future<Output = T> + 'static>) -> JoinAll<T> {
+    let fut = fut
+        .into_iter()
+        .map(|f| JoinFuture::Future(Box::pin(f)))
+        .collect();
+
+    JoinAll { fut }
+}
+
+enum JoinFuture<T> {
+    Future(Pin<Box<dyn Future<Output = T>>>),
+    Result(Option<T>),
+}
+
+impl<T> Unpin for JoinAll<T> {}
+
+impl<T> Future for JoinAll<T> {
+    type Output = Vec<T>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let mut ready = true;
+
+        let this = self.get_mut();
+        for fut in this.fut.iter_mut() {
+            if let JoinFuture::Future(f) = fut {
+                match f.as_mut().poll(cx) {
+                    Poll::Ready(t) => {
+                        *fut = JoinFuture::Result(Some(t));
+                    }
+                    Poll::Pending => ready = false,
+                }
+            }
+        }
+
+        if ready {
+            let mut res = Vec::new();
+            for fut in this.fut.iter_mut() {
+                if let JoinFuture::Result(f) = fut {
+                    res.push(f.take().unwrap());
+                }
+            }
+
+            Poll::Ready(res)
+        } else {
+            Poll::Pending
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[actix_rt::test]
+    async fn test_join_all() {
+        let futs = vec![ready(Ok(1)), ready(Err(3)), ready(Ok(9))];
+        let mut res = join_all(futs).await.into_iter();
+        assert_eq!(Ok(1), res.next().unwrap());
+        assert_eq!(Err(3), res.next().unwrap());
+        assert_eq!(Ok(9), res.next().unwrap());
+    }
+}

actix-server/src/server.rs

@@ -3,9 +3,8 @@ use std::io;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
-use futures_channel::mpsc::UnboundedSender;
-use futures_channel::oneshot;
-use futures_util::FutureExt;
+use tokio::sync::mpsc::UnboundedSender;
+use tokio::sync::oneshot;
 
 use crate::builder::ServerBuilder;
 use crate::signals::Signal;
@@ -42,11 +41,11 @@ impl Server {
     }
 
     pub(crate) fn signal(&self, sig: Signal) {
-        let _ = self.0.unbounded_send(ServerCommand::Signal(sig));
+        let _ = self.0.send(ServerCommand::Signal(sig));
     }
 
     pub(crate) fn worker_faulted(&self, idx: usize) {
-        let _ = self.0.unbounded_send(ServerCommand::WorkerFaulted(idx));
+        let _ = self.0.send(ServerCommand::WorkerFaulted(idx));
     }
 
     /// Pause accepting incoming connections
@@ -55,15 +54,19 @@ impl Server {
     /// All opened connection remains active.
     pub fn pause(&self) -> impl Future<Output = ()> {
         let (tx, rx) = oneshot::channel();
-        let _ = self.0.unbounded_send(ServerCommand::Pause(tx));
-        rx.map(|_| ())
+        let _ = self.0.send(ServerCommand::Pause(tx));
+        async {
+            let _ = rx.await;
+        }
     }
 
     /// Resume accepting incoming connections
     pub fn resume(&self) -> impl Future<Output = ()> {
         let (tx, rx) = oneshot::channel();
-        let _ = self.0.unbounded_send(ServerCommand::Resume(tx));
-        rx.map(|_| ())
+        let _ = self.0.send(ServerCommand::Resume(tx));
+        async {
+            let _ = rx.await;
+        }
     }
 
     /// Stop incoming connection processing, stop all workers and exit.
@@ -71,11 +74,13 @@ impl Server {
     /// If server starts with `spawn()` method, then spawned thread get terminated.
     pub fn stop(&self, graceful: bool) -> impl Future<Output = ()> {
         let (tx, rx) = oneshot::channel();
-        let _ = self.0.unbounded_send(ServerCommand::Stop {
+        let _ = self.0.send(ServerCommand::Stop {
             graceful,
             completion: Some(tx),
         });
-        rx.map(|_| ())
+        async {
+            let _ = rx.await;
+        }
     }
 }
 
@@ -93,7 +98,7 @@ impl Future for Server {
 
         if this.1.is_none() {
             let (tx, rx) = oneshot::channel();
-            if this.0.unbounded_send(ServerCommand::Notify(tx)).is_err() {
+            if this.0.send(ServerCommand::Notify(tx)).is_err() {
                 return Poll::Ready(Ok(()));
             }
             this.1 = Some(rx);
@@ -101,8 +106,7 @@ impl Future for Server {
 
         match Pin::new(this.1.as_mut().unwrap()).poll(cx) {
             Poll::Pending => Poll::Pending,
-            Poll::Ready(Ok(_)) => Poll::Ready(Ok(())),
-            Poll::Ready(Err(_)) => Poll::Ready(Ok(())),
+            Poll::Ready(_) => Poll::Ready(Ok(())),
         }
     }
 }

actix-server/src/service.rs

@@ -1,32 +1,17 @@
 use std::marker::PhantomData;
 use std::net::SocketAddr;
 use std::task::{Context, Poll};
-use std::time::Duration;
 
-use actix_rt::spawn;
-use actix_service::{self as actix, Service, ServiceFactory as ActixServiceFactory};
+use actix_service::{Service, ServiceFactory as BaseServiceFactory};
 use actix_utils::counter::CounterGuard;
-use futures_util::future::{err, ok, LocalBoxFuture, Ready};
-use futures_util::{FutureExt, TryFutureExt};
+use futures_core::future::LocalBoxFuture;
 use log::error;
 
-use super::Token;
-use crate::socket::{FromStream, StdStream};
-
-/// Server message
-pub(crate) enum ServerMessage {
-    /// New stream
-    Connect(StdStream),
-
-    /// Gracefully shutdown
-    Shutdown(Duration),
-
-    /// Force shutdown
-    ForceShutdown,
-}
+use crate::socket::{FromStream, MioStream};
+use crate::{ready, Ready, Token};
 
 pub trait ServiceFactory<Stream: FromStream>: Send + Clone + 'static {
-    type Factory: actix::ServiceFactory<Config = (), Request = Stream>;
+    type Factory: BaseServiceFactory<Stream, Config = ()>;
 
     fn create(&self) -> Self::Factory;
 }
@@ -41,31 +26,34 @@ pub(crate) trait InternalServiceFactory: Send {
 
 pub(crate) type BoxedServerService = Box<
     dyn Service<
-        Request = (Option<CounterGuard>, ServerMessage),
+        (Option<CounterGuard>, MioStream),
         Response = (),
         Error = (),
         Future = Ready<Result<(), ()>>,
     >,
 >;
 
-pub(crate) struct StreamService<T> {
-    service: T,
+pub(crate) struct StreamService<S, I> {
+    service: S,
+    _phantom: PhantomData<I>,
 }
 
-impl<T> StreamService<T> {
-    pub(crate) fn new(service: T) -> Self {
-        StreamService { service }
+impl<S, I> StreamService<S, I> {
+    pub(crate) fn new(service: S) -> Self {
+        StreamService {
+            service,
+            _phantom: PhantomData,
+        }
     }
 }
 
-impl<T, I> Service for StreamService<T>
+impl<S, I> Service<(Option<CounterGuard>, MioStream)> for StreamService<S, I>
 where
-    T: Service<Request = I>,
-    T::Future: 'static,
-    T::Error: 'static,
+    S: Service<I>,
+    S::Future: 'static,
+    S::Error: 'static,
     I: FromStream,
 {
-    type Request = (Option<CounterGuard>, ServerMessage);
     type Response = ();
     type Error = ();
     type Future = Ready<Result<(), ()>>;
@@ -74,26 +62,21 @@ where
         self.service.poll_ready(ctx).map_err(|_| ())
     }
 
-    fn call(&mut self, (guard, req): (Option<CounterGuard>, ServerMessage)) -> Self::Future {
-        match req {
-            ServerMessage::Connect(stream) => {
-                let stream = FromStream::from_stdstream(stream).map_err(|e| {
-                    error!("Can not convert to an async tcp stream: {}", e);
+    fn call(&mut self, (guard, req): (Option<CounterGuard>, MioStream)) -> Self::Future {
+        ready(match FromStream::from_mio(req) {
+            Ok(stream) => {
+                let f = self.service.call(stream);
+                actix_rt::spawn(async move {
+                    let _ = f.await;
+                    drop(guard);
                 });
-
-                if let Ok(stream) = stream {
-                    let f = self.service.call(stream);
-                    spawn(async move {
-                        let _ = f.await;
-                        drop(guard);
-                    });
-                    ok(())
-                } else {
-                    err(())
-                }
+                Ok(())
             }
-            _ => ok(()),
-        }
+            Err(e) => {
+                error!("Can not convert to an async tcp stream: {}", e);
+                Err(())
+            }
+        })
     }
 }
 
@@ -147,36 +130,23 @@ where
 
     fn create(&self) -> LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>> {
         let token = self.token;
-        self.inner
-            .create()
-            .new_service(())
-            .map_err(|_| ())
-            .map_ok(move |inner| {
-                let service: BoxedServerService = Box::new(StreamService::new(inner));
-                vec![(token, service)]
-            })
-            .boxed_local()
-    }
-}
-
-impl InternalServiceFactory for Box<dyn InternalServiceFactory> {
-    fn name(&self, token: Token) -> &str {
-        self.as_ref().name(token)
-    }
-
-    fn clone_factory(&self) -> Box<dyn InternalServiceFactory> {
-        self.as_ref().clone_factory()
-    }
-
-    fn create(&self) -> LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>> {
-        self.as_ref().create()
+        let fut = self.inner.create().new_service(());
+        Box::pin(async move {
+            match fut.await {
+                Ok(inner) => {
+                    let service = Box::new(StreamService::new(inner)) as _;
+                    Ok(vec![(token, service)])
+                }
+                Err(_) => Err(()),
+            }
+        })
     }
 }
 
 impl<F, T, I> ServiceFactory<I> for F
 where
     F: Fn() -> T + Send + Clone + 'static,
-    T: actix::ServiceFactory<Config = (), Request = I>,
+    T: BaseServiceFactory<I, Config = ()>,
     I: FromStream,
 {
     type Factory = T;

actix-server/src/signals.rs

@@ -1,9 +1,8 @@
 use std::future::Future;
-use std::io;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
-use futures_util::future::lazy;
+use futures_core::future::LocalBoxFuture;
 
 use crate::server::Server;
 
@@ -24,50 +23,51 @@ pub(crate) enum Signal {
 pub(crate) struct Signals {
     srv: Server,
     #[cfg(not(unix))]
-    stream: Pin<Box<dyn Future<Output = io::Result<()>>>>,
+    signals: LocalBoxFuture<'static, std::io::Result<()>>,
     #[cfg(unix)]
-    streams: Vec<(Signal, actix_rt::signal::unix::Signal)>,
+    signals: Vec<(Signal, LocalBoxFuture<'static, ()>)>,
 }
 
 impl Signals {
-    pub(crate) fn start(srv: Server) -> io::Result<()> {
-        actix_rt::spawn(lazy(|_| {
-            #[cfg(not(unix))]
-            {
-                actix_rt::spawn(Signals {
-                    srv,
-                    stream: Box::pin(actix_rt::signal::ctrl_c()),
-                });
-            }
-            #[cfg(unix)]
-            {
-                use actix_rt::signal::unix;
+    pub(crate) fn start(srv: Server) {
+        #[cfg(not(unix))]
+        {
+            actix_rt::spawn(Signals {
+                srv,
+                signals: Box::pin(actix_rt::signal::ctrl_c()),
+            });
+        }
+        #[cfg(unix)]
+        {
+            use actix_rt::signal::unix;
 
-                let mut streams = Vec::new();
+            let sig_map = [
+                (unix::SignalKind::interrupt(), Signal::Int),
+                (unix::SignalKind::hangup(), Signal::Hup),
+                (unix::SignalKind::terminate(), Signal::Term),
+                (unix::SignalKind::quit(), Signal::Quit),
+            ];
 
-                let sig_map = [
-                    (unix::SignalKind::interrupt(), Signal::Int),
-                    (unix::SignalKind::hangup(), Signal::Hup),
-                    (unix::SignalKind::terminate(), Signal::Term),
-                    (unix::SignalKind::quit(), Signal::Quit),
-                ];
+            let mut signals = Vec::new();
 
-                for (kind, sig) in sig_map.iter() {
-                    match unix::signal(*kind) {
-                        Ok(stream) => streams.push((*sig, stream)),
-                        Err(e) => log::error!(
-                            "Can not initialize stream handler for {:?} err: {}",
-                            sig,
-                            e
-                        ),
+            for (kind, sig) in sig_map.iter() {
+                match unix::signal(*kind) {
+                    Ok(mut stream) => {
+                        let fut = Box::pin(async move {
+                            let _ = stream.recv().await;
+                        }) as _;
+                        signals.push((*sig, fut));
                     }
+                    Err(e) => log::error!(
+                        "Can not initialize stream handler for {:?} err: {}",
+                        sig,
+                        e
+                    ),
                 }
-
-                actix_rt::spawn(Signals { srv, streams })
             }
-        }));
 
-        Ok(())
+            actix_rt::spawn(Signals { srv, signals });
+        }
     }
 }
 
@@ -76,25 +76,20 @@ impl Future for Signals {
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         #[cfg(not(unix))]
-        match Pin::new(&mut self.stream).poll(cx) {
+        match self.signals.as_mut().poll(cx) {
             Poll::Ready(_) => {
                 self.srv.signal(Signal::Int);
                 Poll::Ready(())
             }
-            Poll::Pending => return Poll::Pending,
+            Poll::Pending => Poll::Pending,
         }
         #[cfg(unix)]
         {
-            for idx in 0..self.streams.len() {
-                loop {
-                    match self.streams[idx].1.poll_recv(cx) {
-                        Poll::Ready(None) => return Poll::Ready(()),
-                        Poll::Pending => break,
-                        Poll::Ready(Some(_)) => {
-                            let sig = self.streams[idx].0;
-                            self.srv.signal(sig);
-                        }
-                    }
+            for (sig, fut) in self.signals.iter_mut() {
+                if fut.as_mut().poll(cx).is_ready() {
+                    let sig = *sig;
+                    self.srv.signal(sig);
+                    return Poll::Ready(());
                 }
             }
             Poll::Pending

actix-server/src/socket.rs

@@ -1,135 +1,91 @@
-use std::{fmt, io, net};
+pub(crate) use std::net::{
+    SocketAddr as StdSocketAddr, TcpListener as StdTcpListener, ToSocketAddrs,
+};
+
+pub(crate) use mio::net::{TcpListener as MioTcpListener, TcpSocket as MioTcpSocket};
+#[cfg(unix)]
+pub(crate) use {
+    mio::net::UnixListener as MioUnixListener,
+    std::os::unix::net::UnixListener as StdUnixListener,
+};
+
+use std::{fmt, io};
 
-use actix_codec::{AsyncRead, AsyncWrite};
 use actix_rt::net::TcpStream;
+use mio::event::Source;
+use mio::net::TcpStream as MioTcpStream;
+use mio::{Interest, Registry, Token};
 
-pub(crate) enum StdListener {
-    Tcp(net::TcpListener),
-    #[cfg(all(unix))]
-    Uds(std::os::unix::net::UnixListener),
+#[cfg(windows)]
+use std::os::windows::io::{FromRawSocket, IntoRawSocket};
+#[cfg(unix)]
+use {
+    actix_rt::net::UnixStream,
+    mio::net::{SocketAddr as MioSocketAddr, UnixStream as MioUnixStream},
+    std::os::unix::io::{FromRawFd, IntoRawFd},
+};
+
+pub(crate) enum MioListener {
+    Tcp(MioTcpListener),
+    #[cfg(unix)]
+    Uds(MioUnixListener),
 }
 
-pub(crate) enum SocketAddr {
-    Tcp(net::SocketAddr),
-    #[cfg(all(unix))]
-    Uds(std::os::unix::net::SocketAddr),
-}
-
-impl fmt::Display for SocketAddr {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            SocketAddr::Tcp(ref addr) => write!(f, "{}", addr),
-            #[cfg(all(unix))]
-            SocketAddr::Uds(ref addr) => write!(f, "{:?}", addr),
-        }
-    }
-}
-
-impl fmt::Debug for SocketAddr {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            SocketAddr::Tcp(ref addr) => write!(f, "{:?}", addr),
-            #[cfg(all(unix))]
-            SocketAddr::Uds(ref addr) => write!(f, "{:?}", addr),
-        }
-    }
-}
-
-impl fmt::Display for StdListener {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            StdListener::Tcp(ref lst) => write!(f, "{}", lst.local_addr().ok().unwrap()),
-            #[cfg(all(unix))]
-            StdListener::Uds(ref lst) => write!(f, "{:?}", lst.local_addr().ok().unwrap()),
-        }
-    }
-}
-
-impl StdListener {
+impl MioListener {
     pub(crate) fn local_addr(&self) -> SocketAddr {
-        match self {
-            StdListener::Tcp(lst) => SocketAddr::Tcp(lst.local_addr().unwrap()),
-            #[cfg(all(unix))]
-            StdListener::Uds(lst) => SocketAddr::Uds(lst.local_addr().unwrap()),
-        }
-    }
-
-    pub(crate) fn into_listener(self) -> SocketListener {
-        match self {
-            StdListener::Tcp(lst) => SocketListener::Tcp(
-                mio::net::TcpListener::from_std(lst)
-                    .expect("Can not create mio::net::TcpListener"),
-            ),
-            #[cfg(all(unix))]
-            StdListener::Uds(lst) => SocketListener::Uds(
-                mio_uds::UnixListener::from_listener(lst)
-                    .expect("Can not create mio_uds::UnixListener"),
-            ),
-        }
-    }
-}
-
-#[derive(Debug)]
-pub enum StdStream {
-    Tcp(std::net::TcpStream),
-    #[cfg(all(unix))]
-    Uds(std::os::unix::net::UnixStream),
-}
-
-pub(crate) enum SocketListener {
-    Tcp(mio::net::TcpListener),
-    #[cfg(all(unix))]
-    Uds(mio_uds::UnixListener),
-}
-
-impl SocketListener {
-    pub(crate) fn accept(&self) -> io::Result<Option<(StdStream, SocketAddr)>> {
         match *self {
-            SocketListener::Tcp(ref lst) => lst
-                .accept_std()
-                .map(|(stream, addr)| Some((StdStream::Tcp(stream), SocketAddr::Tcp(addr)))),
-            #[cfg(all(unix))]
-            SocketListener::Uds(ref lst) => lst.accept_std().map(|res| {
-                res.map(|(stream, addr)| (StdStream::Uds(stream), SocketAddr::Uds(addr)))
-            }),
+            MioListener::Tcp(ref lst) => SocketAddr::Tcp(lst.local_addr().unwrap()),
+            #[cfg(unix)]
+            MioListener::Uds(ref lst) => SocketAddr::Uds(lst.local_addr().unwrap()),
+        }
+    }
+
+    pub(crate) fn accept(&self) -> io::Result<Option<(MioStream, SocketAddr)>> {
+        match *self {
+            MioListener::Tcp(ref lst) => lst
+                .accept()
+                .map(|(stream, addr)| Some((MioStream::Tcp(stream), SocketAddr::Tcp(addr)))),
+            #[cfg(unix)]
+            MioListener::Uds(ref lst) => lst
+                .accept()
+                .map(|(stream, addr)| Some((MioStream::Uds(stream), SocketAddr::Uds(addr)))),
         }
     }
 }
 
-impl mio::Evented for SocketListener {
+impl Source for MioListener {
     fn register(
-        &self,
-        poll: &mio::Poll,
-        token: mio::Token,
-        interest: mio::Ready,
-        opts: mio::PollOpt,
+        &mut self,
+        registry: &Registry,
+        token: Token,
+        interests: Interest,
     ) -> io::Result<()> {
         match *self {
-            SocketListener::Tcp(ref lst) => lst.register(poll, token, interest, opts),
-            #[cfg(all(unix))]
-            SocketListener::Uds(ref lst) => lst.register(poll, token, interest, opts),
+            MioListener::Tcp(ref mut lst) => lst.register(registry, token, interests),
+            #[cfg(unix)]
+            MioListener::Uds(ref mut lst) => lst.register(registry, token, interests),
         }
     }
 
     fn reregister(
-        &self,
-        poll: &mio::Poll,
-        token: mio::Token,
-        interest: mio::Ready,
-        opts: mio::PollOpt,
+        &mut self,
+        registry: &Registry,
+        token: Token,
+        interests: Interest,
     ) -> io::Result<()> {
         match *self {
-            SocketListener::Tcp(ref lst) => lst.reregister(poll, token, interest, opts),
-            #[cfg(all(unix))]
-            SocketListener::Uds(ref lst) => lst.reregister(poll, token, interest, opts),
+            MioListener::Tcp(ref mut lst) => lst.reregister(registry, token, interests),
+            #[cfg(unix)]
+            MioListener::Uds(ref mut lst) => lst.reregister(registry, token, interests),
         }
     }
-    fn deregister(&self, poll: &mio::Poll) -> io::Result<()> {
+
+    fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
         match *self {
-            SocketListener::Tcp(ref lst) => lst.deregister(poll),
-            #[cfg(all(unix))]
-            SocketListener::Uds(ref lst) => {
-                let res = lst.deregister(poll);
+            MioListener::Tcp(ref mut lst) => lst.deregister(registry),
+            #[cfg(unix)]
+            MioListener::Uds(ref mut lst) => {
+                let res = lst.deregister(registry);
 
                 // cleanup file path
                 if let Ok(addr) = lst.local_addr() {
@@ -143,28 +99,156 @@ impl mio::Evented for SocketListener {
     }
 }
 
-pub trait FromStream: AsyncRead + AsyncWrite + Sized {
-    fn from_stdstream(sock: StdStream) -> io::Result<Self>;
+impl From<StdTcpListener> for MioListener {
+    fn from(lst: StdTcpListener) -> Self {
+        MioListener::Tcp(MioTcpListener::from_std(lst))
+    }
 }
 
-impl FromStream for TcpStream {
-    fn from_stdstream(sock: StdStream) -> io::Result<Self> {
-        match sock {
-            StdStream::Tcp(stream) => TcpStream::from_std(stream),
+#[cfg(unix)]
+impl From<StdUnixListener> for MioListener {
+    fn from(lst: StdUnixListener) -> Self {
+        MioListener::Uds(MioUnixListener::from_std(lst))
+    }
+}
+
+impl fmt::Debug for MioListener {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            MioListener::Tcp(ref lst) => write!(f, "{:?}", lst),
             #[cfg(all(unix))]
-            StdStream::Uds(_) => {
+            MioListener::Uds(ref lst) => write!(f, "{:?}", lst),
+        }
+    }
+}
+
+impl fmt::Display for MioListener {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            MioListener::Tcp(ref lst) => write!(f, "{}", lst.local_addr().ok().unwrap()),
+            #[cfg(unix)]
+            MioListener::Uds(ref lst) => write!(f, "{:?}", lst.local_addr().ok().unwrap()),
+        }
+    }
+}
+
+pub(crate) enum SocketAddr {
+    Tcp(StdSocketAddr),
+    #[cfg(unix)]
+    Uds(MioSocketAddr),
+}
+
+impl fmt::Display for SocketAddr {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            SocketAddr::Tcp(ref addr) => write!(f, "{}", addr),
+            #[cfg(unix)]
+            SocketAddr::Uds(ref addr) => write!(f, "{:?}", addr),
+        }
+    }
+}
+
+impl fmt::Debug for SocketAddr {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            SocketAddr::Tcp(ref addr) => write!(f, "{:?}", addr),
+            #[cfg(unix)]
+            SocketAddr::Uds(ref addr) => write!(f, "{:?}", addr),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum MioStream {
+    Tcp(MioTcpStream),
+    #[cfg(unix)]
+    Uds(MioUnixStream),
+}
+
+/// helper trait for converting mio stream to tokio stream.
+pub trait FromStream: Sized {
+    fn from_mio(sock: MioStream) -> io::Result<Self>;
+}
+
+// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+#[cfg(unix)]
+impl FromStream for TcpStream {
+    fn from_mio(sock: MioStream) -> io::Result<Self> {
+        match sock {
+            MioStream::Tcp(mio) => {
+                let raw = IntoRawFd::into_raw_fd(mio);
+                // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                TcpStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
+            }
+            MioStream::Uds(_) => {
                 panic!("Should not happen, bug in server impl");
             }
         }
     }
 }
 
-#[cfg(all(unix))]
-impl FromStream for actix_rt::net::UnixStream {
-    fn from_stdstream(sock: StdStream) -> io::Result<Self> {
+// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+#[cfg(windows)]
+impl FromStream for TcpStream {
+    fn from_mio(sock: MioStream) -> io::Result<Self> {
         match sock {
-            StdStream::Tcp(_) => panic!("Should not happen, bug in server impl"),
-            StdStream::Uds(stream) => actix_rt::net::UnixStream::from_std(stream),
+            MioStream::Tcp(mio) => {
+                let raw = IntoRawSocket::into_raw_socket(mio);
+                // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                TcpStream::from_std(unsafe { FromRawSocket::from_raw_socket(raw) })
+            }
+        }
+    }
+}
+
+// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+#[cfg(unix)]
+impl FromStream for UnixStream {
+    fn from_mio(sock: MioStream) -> io::Result<Self> {
+        match sock {
+            MioStream::Tcp(_) => panic!("Should not happen, bug in server impl"),
+            MioStream::Uds(mio) => {
+                let raw = IntoRawFd::into_raw_fd(mio);
+                // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                UnixStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn socket_addr() {
+        let addr = SocketAddr::Tcp("127.0.0.1:8080".parse().unwrap());
+        assert!(format!("{:?}", addr).contains("127.0.0.1:8080"));
+        assert_eq!(format!("{}", addr), "127.0.0.1:8080");
+
+        let addr: StdSocketAddr = "127.0.0.1:0".parse().unwrap();
+        let socket = MioTcpSocket::new_v4().unwrap();
+        socket.set_reuseaddr(true).unwrap();
+        socket.bind(addr).unwrap();
+        let tcp = socket.listen(128).unwrap();
+        let lst = MioListener::Tcp(tcp);
+        assert!(format!("{:?}", lst).contains("TcpListener"));
+        assert!(format!("{}", lst).contains("127.0.0.1"));
+    }
+
+    #[test]
+    #[cfg(unix)]
+    fn uds() {
+        let _ = std::fs::remove_file("/tmp/sock.xxxxx");
+        if let Ok(socket) = MioUnixListener::bind("/tmp/sock.xxxxx") {
+            let addr = socket.local_addr().expect("Couldn't get local address");
+            let a = SocketAddr::Uds(addr);
+            assert!(format!("{:?}", a).contains("/tmp/sock.xxxxx"));
+            assert!(format!("{}", a).contains("/tmp/sock.xxxxx"));
+
+            let lst = MioListener::Uds(socket);
+            assert!(format!("{:?}", lst).contains("/tmp/sock.xxxxx"));
+            assert!(format!("{}", lst).contains("/tmp/sock.xxxxx"));
         }
     }
 }

actix-server/src/waker_queue.rs

@@ -0,0 +1,89 @@
+use std::{
+    collections::VecDeque,
+    ops::Deref,
+    sync::{Arc, Mutex, MutexGuard},
+};
+
+use mio::{Registry, Token as MioToken, Waker};
+
+use crate::worker::WorkerHandle;
+
+/// waker token for `mio::Poll` instance
+pub(crate) const WAKER_TOKEN: MioToken = MioToken(usize::MAX);
+
+/// `mio::Waker` with a queue for waking up the `Accept`'s `Poll` and contains the `WakerInterest`
+/// the `Poll` would want to look into.
+pub(crate) struct WakerQueue(Arc<(Waker, Mutex<VecDeque<WakerInterest>>)>);
+
+impl Clone for WakerQueue {
+    fn clone(&self) -> Self {
+        Self(self.0.clone())
+    }
+}
+
+impl Deref for WakerQueue {
+    type Target = (Waker, Mutex<VecDeque<WakerInterest>>);
+
+    fn deref(&self) -> &Self::Target {
+        self.0.deref()
+    }
+}
+
+impl WakerQueue {
+    /// construct a waker queue with given `Poll`'s `Registry` and capacity.
+    ///
+    /// A fixed `WAKER_TOKEN` is used to identify the wake interest and the `Poll` needs to match
+    /// event's token for it to properly handle `WakerInterest`.
+    pub(crate) fn new(registry: &Registry) -> std::io::Result<Self> {
+        let waker = Waker::new(registry, WAKER_TOKEN)?;
+        let queue = Mutex::new(VecDeque::with_capacity(16));
+
+        Ok(Self(Arc::new((waker, queue))))
+    }
+
+    /// push a new interest to the queue and wake up the accept poll afterwards.
+    pub(crate) fn wake(&self, interest: WakerInterest) {
+        let (waker, queue) = self.deref();
+
+        queue
+            .lock()
+            .expect("Failed to lock WakerQueue")
+            .push_back(interest);
+
+        waker
+            .wake()
+            .unwrap_or_else(|e| panic!("can not wake up Accept Poll: {}", e));
+    }
+
+    /// get a MutexGuard of the waker queue.
+    pub(crate) fn guard(&self) -> MutexGuard<'_, VecDeque<WakerInterest>> {
+        self.deref().1.lock().expect("Failed to lock WakerQueue")
+    }
+
+    /// reset the waker queue so it does not grow infinitely.
+    pub(crate) fn reset(queue: &mut VecDeque<WakerInterest>) {
+        std::mem::swap(&mut VecDeque::<WakerInterest>::with_capacity(16), queue);
+    }
+}
+
+/// types of interests we would look into when `Accept`'s `Poll` is waked up by waker.
+///
+/// *. These interests should not be confused with `mio::Interest` and mostly not I/O related
+pub(crate) enum WakerInterest {
+    /// `WorkerAvailable` is an interest from `Worker` notifying `Accept` there is a worker
+    /// available and can accept new tasks.
+    WorkerAvailable,
+    /// `Pause`, `Resume`, `Stop` Interest are from `ServerBuilder` future. It listens to
+    /// `ServerCommand` and notify `Accept` to do exactly these tasks.
+    Pause,
+    Resume,
+    Stop,
+    /// `Timer` is an interest sent as a delayed future. When an error happens on accepting
+    /// connection `Accept` would deregister socket listener temporary and wake up the poll and
+    /// register them again after the delayed future resolve.
+    Timer,
+    /// `Worker` is an interest happen after a worker runs into faulted state(This is determined
+    /// by if work can be sent to it successfully).`Accept` would be waked up and add the new
+    /// `WorkerHandle`.
+    Worker(WorkerHandle),
+}

actix-server/src/worker.rs

@@ -1,22 +1,22 @@
+use std::future::Future;
 use std::pin::Pin;
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::sync::Arc;
 use std::task::{Context, Poll};
-use std::time;
+use std::time::Duration;
 
-use actix_rt::time::{delay_until, Delay, Instant};
+use actix_rt::time::{sleep_until, Instant, Sleep};
 use actix_rt::{spawn, Arbiter};
 use actix_utils::counter::Counter;
-use futures_channel::mpsc::{unbounded, UnboundedReceiver, UnboundedSender};
-use futures_channel::oneshot;
-use futures_util::future::{join_all, LocalBoxFuture, MapOk};
-use futures_util::{future::Future, stream::Stream, FutureExt, TryFutureExt};
+use futures_core::future::LocalBoxFuture;
 use log::{error, info, trace};
+use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender};
+use tokio::sync::oneshot;
 
-use crate::accept::AcceptNotify;
-use crate::service::{BoxedServerService, InternalServiceFactory, ServerMessage};
-use crate::socket::{SocketAddr, StdStream};
-use crate::Token;
+use crate::service::{BoxedServerService, InternalServiceFactory};
+use crate::socket::{MioStream, SocketAddr};
+use crate::waker_queue::{WakerInterest, WakerQueue};
+use crate::{join_all, Token};
 
 pub(crate) struct WorkerCommand(Conn);
 
@@ -29,7 +29,7 @@ pub(crate) struct StopCommand {
 
 #[derive(Debug)]
 pub(crate) struct Conn {
-    pub io: StdStream,
+    pub io: MioStream,
     pub token: Token,
     pub peer: Option<SocketAddr>,
 }
@@ -46,31 +46,33 @@ pub fn max_concurrent_connections(num: usize) {
     MAX_CONNS.store(num, Ordering::Relaxed);
 }
 
-pub(crate) fn num_connections() -> usize {
-    MAX_CONNS_COUNTER.with(|conns| conns.total())
-}
-
 thread_local! {
     static MAX_CONNS_COUNTER: Counter =
         Counter::new(MAX_CONNS.load(Ordering::Relaxed));
 }
 
+pub(crate) fn num_connections() -> usize {
+    MAX_CONNS_COUNTER.with(|conns| conns.total())
+}
+
+// a handle to worker that can send message to worker and share the availability of worker to other
+// thread.
 #[derive(Clone)]
-pub(crate) struct WorkerClient {
+pub(crate) struct WorkerHandle {
     pub idx: usize,
     tx1: UnboundedSender<WorkerCommand>,
     tx2: UnboundedSender<StopCommand>,
     avail: WorkerAvailability,
 }
 
-impl WorkerClient {
+impl WorkerHandle {
     pub fn new(
         idx: usize,
         tx1: UnboundedSender<WorkerCommand>,
         tx2: UnboundedSender<StopCommand>,
         avail: WorkerAvailability,
     ) -> Self {
-        WorkerClient {
+        WorkerHandle {
             idx,
             tx1,
             tx2,
@@ -79,9 +81,7 @@ impl WorkerClient {
     }
 
     pub fn send(&self, msg: Conn) -> Result<(), Conn> {
-        self.tx1
-            .unbounded_send(WorkerCommand(msg))
-            .map_err(|msg| msg.into_inner().0)
+        self.tx1.send(WorkerCommand(msg)).map_err(|msg| msg.0 .0)
     }
 
     pub fn available(&self) -> bool {
@@ -90,21 +90,21 @@ impl WorkerClient {
 
     pub fn stop(&self, graceful: bool) -> oneshot::Receiver<bool> {
         let (result, rx) = oneshot::channel();
-        let _ = self.tx2.unbounded_send(StopCommand { graceful, result });
+        let _ = self.tx2.send(StopCommand { graceful, result });
         rx
     }
 }
 
 #[derive(Clone)]
 pub(crate) struct WorkerAvailability {
-    notify: AcceptNotify,
+    waker: WakerQueue,
     available: Arc<AtomicBool>,
 }
 
 impl WorkerAvailability {
-    pub fn new(notify: AcceptNotify) -> Self {
+    pub fn new(waker: WakerQueue) -> Self {
         WorkerAvailability {
-            notify,
+            waker,
             available: Arc::new(AtomicBool::new(false)),
         }
     }
@@ -115,8 +115,9 @@ impl WorkerAvailability {
 
     pub fn set(&self, val: bool) {
         let old = self.available.swap(val, Ordering::Release);
+        // notify the accept on switched to available.
         if !old && val {
-            self.notify.notify()
+            self.waker.wake(WakerInterest::WorkerAvailable);
         }
     }
 }
@@ -133,7 +134,7 @@ pub(crate) struct Worker {
     conns: Counter,
     factories: Vec<Box<dyn InternalServiceFactory>>,
     state: WorkerState,
-    shutdown_timeout: time::Duration,
+    shutdown_timeout: Duration,
 }
 
 struct WorkerService {
@@ -164,63 +165,65 @@ impl Worker {
         idx: usize,
         factories: Vec<Box<dyn InternalServiceFactory>>,
         availability: WorkerAvailability,
-        shutdown_timeout: time::Duration,
-    ) -> WorkerClient {
-        let (tx1, rx) = unbounded();
-        let (tx2, rx2) = unbounded();
+        shutdown_timeout: Duration,
+    ) -> WorkerHandle {
+        let (tx1, rx) = unbounded_channel();
+        let (tx2, rx2) = unbounded_channel();
         let avail = availability.clone();
 
-        Arbiter::new().send(
-            async move {
-                availability.set(false);
-                let mut wrk = MAX_CONNS_COUNTER.with(move |conns| Worker {
-                    rx,
-                    rx2,
-                    availability,
-                    factories,
-                    shutdown_timeout,
-                    services: Vec::new(),
-                    conns: conns.clone(),
-                    state: WorkerState::Unavailable(Vec::new()),
-                });
+        // every worker runs in it's own arbiter.
+        Arbiter::new().send(Box::pin(async move {
+            availability.set(false);
+            let mut wrk = MAX_CONNS_COUNTER.with(move |conns| Worker {
+                rx,
+                rx2,
+                availability,
+                factories,
+                shutdown_timeout,
+                services: Vec::new(),
+                conns: conns.clone(),
+                state: WorkerState::Unavailable,
+            });
 
-                let mut fut: Vec<MapOk<LocalBoxFuture<'static, _>, _>> = Vec::new();
-                for (idx, factory) in wrk.factories.iter().enumerate() {
-                    fut.push(factory.create().map_ok(move |r| {
-                        r.into_iter()
-                            .map(|(t, s): (Token, _)| (idx, t, s))
-                            .collect::<Vec<_>>()
-                    }));
-                }
+            let fut = wrk
+                .factories
+                .iter()
+                .enumerate()
+                .map(|(idx, factory)| {
+                    let fut = factory.create();
+                    async move {
+                        fut.await.map(|r| {
+                            r.into_iter().map(|(t, s)| (idx, t, s)).collect::<Vec<_>>()
+                        })
+                    }
+                })
+                .collect::<Vec<_>>();
 
-                spawn(async move {
-                    let res = join_all(fut).await;
-                    let res: Result<Vec<_>, _> = res.into_iter().collect();
-                    match res {
-                        Ok(services) => {
-                            for item in services {
-                                for (factory, token, service) in item {
-                                    assert_eq!(token.0, wrk.services.len());
-                                    wrk.services.push(WorkerService {
-                                        factory,
-                                        service,
-                                        status: WorkerServiceStatus::Unavailable,
-                                    });
-                                }
+            spawn(async move {
+                let res: Result<Vec<_>, _> = join_all(fut).await.into_iter().collect();
+                match res {
+                    Ok(services) => {
+                        for item in services {
+                            for (factory, token, service) in item {
+                                assert_eq!(token.0, wrk.services.len());
+                                wrk.services.push(WorkerService {
+                                    factory,
+                                    service,
+                                    status: WorkerServiceStatus::Unavailable,
+                                });
                             }
                         }
-                        Err(e) => {
-                            error!("Can not start worker: {:?}", e);
-                            Arbiter::current().stop();
-                        }
                     }
-                    wrk.await
-                });
-            }
-            .boxed(),
-        );
+                    Err(e) => {
+                        error!("Can not start worker: {:?}", e);
+                        Arbiter::current().stop();
+                    }
+                }
+                wrk.await
+            });
+        }));
 
-        WorkerClient::new(idx, tx1, tx2, avail)
+        WorkerHandle::new(idx, tx1, tx2, avail)
     }
 
     fn shutdown(&mut self, force: bool) {
@@ -228,23 +231,12 @@ impl Worker {
             self.services.iter_mut().for_each(|srv| {
                 if srv.status == WorkerServiceStatus::Available {
                     srv.status = WorkerServiceStatus::Stopped;
-                    actix_rt::spawn(
-                        srv.service
-                            .call((None, ServerMessage::ForceShutdown))
-                            .map(|_| ()),
-                    );
                 }
             });
         } else {
-            let timeout = self.shutdown_timeout;
             self.services.iter_mut().for_each(move |srv| {
                 if srv.status == WorkerServiceStatus::Available {
                     srv.status = WorkerServiceStatus::Stopping;
-                    actix_rt::spawn(
-                        srv.service
-                            .call((None, ServerMessage::Shutdown(timeout)))
-                            .map(|_| ()),
-                    );
                 }
             });
         }
@@ -253,7 +245,7 @@ impl Worker {
     fn check_readiness(&mut self, cx: &mut Context<'_>) -> Result<bool, (Token, usize)> {
         let mut ready = self.conns.available(cx);
         let mut failed = None;
-        for (idx, srv) in &mut self.services.iter_mut().enumerate() {
+        for (idx, srv) in self.services.iter_mut().enumerate() {
             if srv.status == WorkerServiceStatus::Available
                 || srv.status == WorkerServiceStatus::Unavailable
             {
@@ -299,16 +291,15 @@ impl Worker {
 
 enum WorkerState {
     Available,
-    Unavailable(Vec<Conn>),
+    Unavailable,
     Restarting(
         usize,
         Token,
-        #[allow(clippy::type_complexity)]
-        Pin<Box<dyn Future<Output = Result<Vec<(Token, BoxedServerService)>, ()>>>>,
+        LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>>,
     ),
     Shutdown(
-        Pin<Box<Delay>>,
-        Pin<Box<Delay>>,
+        Pin<Box<Sleep>>,
+        Pin<Box<Sleep>>,
         Option<oneshot::Sender<bool>>,
     ),
 }
@@ -316,12 +307,10 @@ enum WorkerState {
 impl Future for Worker {
     type Output = ();
 
-    // FIXME: remove this attribute
-    #[allow(clippy::never_loop)]
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         // `StopWorker` message handler
         if let Poll::Ready(Some(StopCommand { graceful, result })) =
-            Pin::new(&mut self.rx2).poll_next(cx)
+            Pin::new(&mut self.rx2).poll_recv(cx)
         {
             self.availability.set(false);
             let num = num_connections();
@@ -335,8 +324,8 @@ impl Future for Worker {
                 if num != 0 {
                     info!("Graceful worker shutdown, {} connections", num);
                     self.state = WorkerState::Shutdown(
-                        Box::pin(delay_until(Instant::now() + time::Duration::from_secs(1))),
-                        Box::pin(delay_until(Instant::now() + self.shutdown_timeout)),
+                        Box::pin(sleep_until(Instant::now() + Duration::from_secs(1))),
+                        Box::pin(sleep_until(Instant::now() + self.shutdown_timeout)),
                         Some(result),
                     );
                 } else {
@@ -352,53 +341,35 @@ impl Future for Worker {
         }
 
         match self.state {
-            WorkerState::Unavailable(ref mut conns) => {
-                let conn = conns.pop();
-                match self.check_readiness(cx) {
-                    Ok(true) => {
-                        // process requests from wait queue
-                        if let Some(conn) = conn {
-                            let guard = self.conns.get();
-                            let _ = self.services[conn.token.0]
-                                .service
-                                .call((Some(guard), ServerMessage::Connect(conn.io)));
-                        } else {
-                            self.state = WorkerState::Available;
-                            self.availability.set(true);
-                        }
-                        self.poll(cx)
-                    }
-                    Ok(false) => {
-                        // push connection back to queue
-                        if let Some(conn) = conn {
-                            if let WorkerState::Unavailable(ref mut conns) = self.state {
-                                conns.push(conn);
-                            }
-                        }
-                        Poll::Pending
-                    }
-                    Err((token, idx)) => {
-                        trace!(
-                            "Service {:?} failed, restarting",
-                            self.factories[idx].name(token)
-                        );
-                        self.services[token.0].status = WorkerServiceStatus::Restarting;
-                        self.state =
-                            WorkerState::Restarting(idx, token, self.factories[idx].create());
-                        self.poll(cx)
-                    }
+            WorkerState::Unavailable => match self.check_readiness(cx) {
+                Ok(true) => {
+                    self.state = WorkerState::Available;
+                    self.availability.set(true);
+                    self.poll(cx)
                 }
-            }
+                Ok(false) => Poll::Pending,
+                Err((token, idx)) => {
+                    trace!(
+                        "Service {:?} failed, restarting",
+                        self.factories[idx].name(token)
+                    );
+                    self.services[token.0].status = WorkerServiceStatus::Restarting;
+                    self.state =
+                        WorkerState::Restarting(idx, token, self.factories[idx].create());
+                    self.poll(cx)
+                }
+            },
             WorkerState::Restarting(idx, token, ref mut fut) => {
-                match Pin::new(fut).poll(cx) {
+                match fut.as_mut().poll(cx) {
                     Poll::Ready(Ok(item)) => {
-                        for (token, service) in item {
+                        // only interest in the first item?
+                        if let Some((token, service)) = item.into_iter().next() {
                             trace!(
                                 "Service {:?} has been restarted",
                                 self.factories[idx].name(token)
                             );
                             self.services[token.0].created(service);
-                            self.state = WorkerState::Unavailable(Vec::new());
+                            self.state = WorkerState::Unavailable;
                             return self.poll(cx);
                         }
                     }
@@ -408,9 +379,7 @@ impl Future for Worker {
                             self.factories[idx].name(token)
                         );
                     }
-                    Poll::Pending => {
-                        return Poll::Pending;
-                    }
+                    Poll::Pending => return Poll::Pending,
                 }
                 self.poll(cx)
             }
@@ -423,71 +392,56 @@ impl Future for Worker {
                 }
 
                 // check graceful timeout
-                match t2.as_mut().poll(cx) {
-                    Poll::Pending => (),
-                    Poll::Ready(_) => {
-                        let _ = tx.take().unwrap().send(false);
-                        self.shutdown(true);
-                        Arbiter::current().stop();
-                        return Poll::Ready(());
-                    }
+                if Pin::new(t2).poll(cx).is_ready() {
+                    let _ = tx.take().unwrap().send(false);
+                    self.shutdown(true);
+                    Arbiter::current().stop();
+                    return Poll::Ready(());
                 }
 
                 // sleep for 1 second and then check again
-                match t1.as_mut().poll(cx) {
-                    Poll::Pending => (),
-                    Poll::Ready(_) => {
-                        *t1 = Box::pin(delay_until(
-                            Instant::now() + time::Duration::from_secs(1),
-                        ));
-                        let _ = t1.as_mut().poll(cx);
-                    }
+                if t1.as_mut().poll(cx).is_ready() {
+                    *t1 = Box::pin(sleep_until(Instant::now() + Duration::from_secs(1)));
+                    let _ = t1.as_mut().poll(cx);
                 }
+
                 Poll::Pending
             }
-            WorkerState::Available => {
-                loop {
-                    match Pin::new(&mut self.rx).poll_next(cx) {
-                        // handle incoming io stream
-                        Poll::Ready(Some(WorkerCommand(msg))) => {
-                            match self.check_readiness(cx) {
-                                Ok(true) => {
-                                    let guard = self.conns.get();
-                                    let _ = self.services[msg.token.0]
-                                        .service
-                                        .call((Some(guard), ServerMessage::Connect(msg.io)));
-                                    continue;
-                                }
-                                Ok(false) => {
-                                    trace!("Worker is unavailable");
-                                    self.availability.set(false);
-                                    self.state = WorkerState::Unavailable(vec![msg]);
-                                }
-                                Err((token, idx)) => {
-                                    trace!(
-                                        "Service {:?} failed, restarting",
-                                        self.factories[idx].name(token)
-                                    );
-                                    self.availability.set(false);
-                                    self.services[token.0].status =
-                                        WorkerServiceStatus::Restarting;
-                                    self.state = WorkerState::Restarting(
-                                        idx,
-                                        token,
-                                        self.factories[idx].create(),
-                                    );
-                                }
-                            }
-                            return self.poll(cx);
-                        }
-                        Poll::Pending => {
-                            self.state = WorkerState::Available;
-                            return Poll::Pending;
-                        }
-                        Poll::Ready(None) => return Poll::Ready(()),
+            // actively poll stream and handle worker command
+            WorkerState::Available => loop {
+                match self.check_readiness(cx) {
+                    Ok(true) => (),
+                    Ok(false) => {
+                        trace!("Worker is unavailable");
+                        self.availability.set(false);
+                        self.state = WorkerState::Unavailable;
+                        return self.poll(cx);
+                    }
+                    Err((token, idx)) => {
+                        trace!(
+                            "Service {:?} failed, restarting",
+                            self.factories[idx].name(token)
+                        );
+                        self.availability.set(false);
+                        self.services[token.0].status = WorkerServiceStatus::Restarting;
+                        self.state =
+                            WorkerState::Restarting(idx, token, self.factories[idx].create());
+                        return self.poll(cx);
                     }
                 }
-            }
+
+                match Pin::new(&mut self.rx).poll_recv(cx) {
+                    // handle incoming io stream
+                    Poll::Ready(Some(WorkerCommand(msg))) => {
+                        let guard = self.conns.get();
+                        let _ = self.services[msg.token.0]
+                            .service
+                            .call((Some(guard), msg.io));
+                    }
+                    Poll::Pending => return Poll::Pending,
+                    Poll::Ready(None) => return Poll::Ready(()),
+                };
+            },
         }
     }
 }

actix-server/tests/test_server.rs

@@ -5,14 +5,13 @@ use std::{net, thread, time};
 use actix_server::Server;
 use actix_service::fn_service;
 use futures_util::future::{lazy, ok};
-use socket2::{Domain, Protocol, Socket, Type};
 
 fn unused_addr() -> net::SocketAddr {
     let addr: net::SocketAddr = "127.0.0.1:0".parse().unwrap();
-    let socket = Socket::new(Domain::ipv4(), Type::stream(), Some(Protocol::tcp())).unwrap();
-    socket.bind(&addr.into()).unwrap();
-    socket.set_reuse_address(true).unwrap();
-    let tcp = socket.into_tcp_listener();
+    let socket = mio::net::TcpSocket::new_v4().unwrap();
+    socket.bind(addr).unwrap();
+    socket.set_reuseaddr(true).unwrap();
+    let tcp = socket.listen(32).unwrap();
     tcp.local_addr().unwrap()
 }
 
@@ -23,12 +22,14 @@ fn test_bind() {
 
     let h = thread::spawn(move || {
         let sys = actix_rt::System::new("test");
-        let srv = Server::build()
-            .workers(1)
-            .disable_signals()
-            .bind("test", addr, move || fn_service(|_| ok::<_, ()>(())))
-            .unwrap()
-            .start();
+        let srv = sys.block_on(lazy(|_| {
+            Server::build()
+                .workers(1)
+                .disable_signals()
+                .bind("test", addr, move || fn_service(|_| ok::<_, ()>(())))
+                .unwrap()
+                .start()
+        }));
         let _ = tx.send((srv, actix_rt::System::current()));
         let _ = sys.run();
     });
@@ -48,13 +49,15 @@ fn test_listen() {
     let h = thread::spawn(move || {
         let sys = actix_rt::System::new("test");
         let lst = net::TcpListener::bind(addr).unwrap();
-        Server::build()
-            .disable_signals()
-            .workers(1)
-            .listen("test", lst, move || fn_service(|_| ok::<_, ()>(())))
-            .unwrap()
-            .start();
-        let _ = tx.send(actix_rt::System::current());
+        sys.block_on(async {
+            Server::build()
+                .disable_signals()
+                .workers(1)
+                .listen("test", lst, move || fn_service(|_| ok::<_, ()>(())))
+                .unwrap()
+                .start();
+            let _ = tx.send(actix_rt::System::current());
+        });
         let _ = sys.run();
     });
     let sys = rx.recv().unwrap();
@@ -79,22 +82,25 @@ fn test_start() {
 
     let h = thread::spawn(move || {
         let sys = actix_rt::System::new("test");
-        let srv: Server = Server::build()
-            .backlog(100)
-            .disable_signals()
-            .bind("test", addr, move || {
-                fn_service(|io: TcpStream| async move {
-                    let mut f = Framed::new(io, BytesCodec);
-                    f.send(Bytes::from_static(b"test")).await.unwrap();
-                    Ok::<_, ()>(())
+        let srv = sys.block_on(lazy(|_| {
+            Server::build()
+                .backlog(100)
+                .disable_signals()
+                .bind("test", addr, move || {
+                    fn_service(|io: TcpStream| async move {
+                        let mut f = Framed::new(io, BytesCodec);
+                        f.send(Bytes::from_static(b"test")).await.unwrap();
+                        Ok::<_, ()>(())
+                    })
                 })
-            })
-            .unwrap()
-            .start();
+                .unwrap()
+                .start()
+        }));
 
         let _ = tx.send((srv, actix_rt::System::current()));
         let _ = sys.run();
     });
+
     let (srv, sys) = rx.recv().unwrap();
 
     let mut buf = [1u8; 4];
@@ -145,28 +151,30 @@ fn test_configure() {
     let h = thread::spawn(move || {
         let num = num2.clone();
         let sys = actix_rt::System::new("test");
-        let srv = Server::build()
-            .disable_signals()
-            .configure(move |cfg| {
-                let num = num.clone();
-                let lst = net::TcpListener::bind(addr3).unwrap();
-                cfg.bind("addr1", addr1)
-                    .unwrap()
-                    .bind("addr2", addr2)
-                    .unwrap()
-                    .listen("addr3", lst)
-                    .apply(move |rt| {
-                        let num = num.clone();
-                        rt.service("addr1", fn_service(|_| ok::<_, ()>(())));
-                        rt.service("addr3", fn_service(|_| ok::<_, ()>(())));
-                        rt.on_start(lazy(move |_| {
-                            let _ = num.fetch_add(1, Relaxed);
-                        }))
-                    })
-            })
-            .unwrap()
-            .workers(1)
-            .start();
+        let srv = sys.block_on(lazy(|_| {
+            Server::build()
+                .disable_signals()
+                .configure(move |cfg| {
+                    let num = num.clone();
+                    let lst = net::TcpListener::bind(addr3).unwrap();
+                    cfg.bind("addr1", addr1)
+                        .unwrap()
+                        .bind("addr2", addr2)
+                        .unwrap()
+                        .listen("addr3", lst)
+                        .apply(move |rt| {
+                            let num = num.clone();
+                            rt.service("addr1", fn_service(|_| ok::<_, ()>(())));
+                            rt.service("addr3", fn_service(|_| ok::<_, ()>(())));
+                            rt.on_start(lazy(move |_| {
+                                let _ = num.fetch_add(1, Relaxed);
+                            }))
+                        })
+                })
+                .unwrap()
+                .workers(1)
+                .start()
+        }));
         let _ = tx.send((srv, actix_rt::System::current()));
         let _ = sys.run();
     });

actix-service/CHANGES.md

@@ -1,13 +1,31 @@
 # Changes
 
 ## Unreleased - 2020-xx-xx
-* Upgrade `pin-project` to `1.0`.
+
+
+## 2.0.0-beta.1 - 2020-12-28
+* `Service`, other traits, and many type signatures now take the the request type as a type
+  parameter instead of an associated type. [#232]
+* Add `always_ready!` and `forward_ready!` macros. [#233]
+* Crate is now `no_std`. [#233]
+* Migrate pin projections to `pin-project-lite`. [#233]
+* Remove `AndThenApplyFn` and Pipeline `and_then_apply_fn`. Use the
+  `.and_then(apply_fn(...))` construction. [#233]
+* Move non-vital methods to `ServiceExt` and `ServiceFactoryExt` extension traits. [#235]
+
+[#232]: https://github.com/actix/actix-net/pull/232
+[#233]: https://github.com/actix/actix-net/pull/233
+[#235]: https://github.com/actix/actix-net/pull/235
+
 
 ## 1.0.6 - 2020-08-09
 
 ### Fixed
 
-* Removed unsound custom Cell implementation that allowed obtaining several mutable references to the same data, which is undefined behavior in Rust and could lead to violations of memory safety. External code could obtain several mutable references to the same data through service combinators. Attempts to acquire several mutable references to the same data will instead result in a panic.
+* Removed unsound custom Cell implementation that allowed obtaining several mutable references to
+  the same data, which is undefined behavior in Rust and could lead to violations of memory safety. External code could obtain several mutable references to the same data through
+  service combinators. Attempts to acquire several mutable references to the same data will instead
+  result in a panic.
 
 ## [1.0.5] - 2020-01-16
 

actix-service/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "actix-service"
-version = "1.0.6"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+version = "2.0.0-beta.1"
+authors = [
+    "Nikolay Kim <fafhrd91@gmail.com>",
+    "Rob Ede <robjtede@icloud.com>",
+]
 description = "Service trait and combinators for representing asynchronous request/response operations."
 keywords = ["network", "framework", "async", "futures", "service"]
 homepage = "https://actix.rs"
@@ -17,17 +20,9 @@ name = "actix_service"
 path = "src/lib.rs"
 
 [dependencies]
-futures-util = "0.3.1"
-pin-project = "1.0.0"
+futures-core = { version = "0.3.7", default-features = false }
+pin-project-lite = "0.2"
 
 [dev-dependencies]
 actix-rt = "1.0.0"
-criterion = "0.3"
-
-[[bench]]
-name = "unsafecell_vs_refcell"
-harness = false
-
-[[bench]]
-name = "and_then"
-harness = false
+futures-util = { version = "0.3.7", default-features = false }

actix-service/benches/and_then.rs

@@ -1,332 +0,0 @@
-use actix_service::boxed::BoxFuture;
-use actix_service::IntoService;
-use actix_service::Service;
-/// Benchmark various implementations of and_then
-use criterion::{criterion_main, Criterion};
-use futures_util::future::join_all;
-use futures_util::future::TryFutureExt;
-use std::cell::{RefCell, UnsafeCell};
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-/*
- * Test services A,B for AndThen service implementations
- */
-
-async fn svc1(_: ()) -> Result<usize, ()> {
-    Ok(1)
-}
-
-async fn svc2(req: usize) -> Result<usize, ()> {
-    Ok(req + 1)
-}
-
-/*
- * AndThenUC - original AndThen service based on UnsafeCell
- * Cut down version of actix_service::AndThenService based on actix-service::Cell
- */
-
-struct AndThenUC<A, B>(Rc<UnsafeCell<(A, B)>>);
-
-impl<A, B> AndThenUC<A, B> {
-    fn new(a: A, b: B) -> Self
-    where
-        A: Service,
-        B: Service<Request = A::Response, Error = A::Error>,
-    {
-        Self(Rc::new(UnsafeCell::new((a, b))))
-    }
-}
-
-impl<A, B> Clone for AndThenUC<A, B> {
-    fn clone(&self) -> Self {
-        Self(self.0.clone())
-    }
-}
-
-impl<A, B> Service for AndThenUC<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    type Request = A::Request;
-    type Response = B::Response;
-    type Error = A::Error;
-    type Future = AndThenServiceResponse<A, B>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, req: A::Request) -> Self::Future {
-        let fut = unsafe { &mut *(*self.0).get() }.0.call(req);
-        AndThenServiceResponse {
-            state: State::A(fut, Some(self.0.clone())),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub(crate) struct AndThenServiceResponse<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    #[pin]
-    state: State<A, B>,
-}
-
-#[pin_project::pin_project(project = StateProj)]
-enum State<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    A(#[pin] A::Future, Option<Rc<UnsafeCell<(A, B)>>>),
-    B(#[pin] B::Future),
-    Empty,
-}
-
-impl<A, B> Future for AndThenServiceResponse<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    type Output = Result<B::Response, A::Error>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.as_mut().project();
-
-        match this.state.as_mut().project() {
-            StateProj::A(fut, b) => match fut.poll(cx)? {
-                Poll::Ready(res) => {
-                    let b = b.take().unwrap();
-                    this.state.set(State::Empty); // drop fut A
-                    let fut = unsafe { &mut (*b.get()).1 }.call(res);
-                    this.state.set(State::B(fut));
-                    self.poll(cx)
-                }
-                Poll::Pending => Poll::Pending,
-            },
-            StateProj::B(fut) => fut.poll(cx).map(|r| {
-                this.state.set(State::Empty);
-                r
-            }),
-            StateProj::Empty => {
-                panic!("future must not be polled after it returned `Poll::Ready`")
-            }
-        }
-    }
-}
-
-/*
- * AndThenRC - AndThen service based on RefCell
- */
-
-struct AndThenRC<A, B>(Rc<RefCell<(A, B)>>);
-
-impl<A, B> AndThenRC<A, B> {
-    fn new(a: A, b: B) -> Self
-    where
-        A: Service,
-        B: Service<Request = A::Response, Error = A::Error>,
-    {
-        Self(Rc::new(RefCell::new((a, b))))
-    }
-}
-
-impl<A, B> Clone for AndThenRC<A, B> {
-    fn clone(&self) -> Self {
-        Self(self.0.clone())
-    }
-}
-
-impl<A, B> Service for AndThenRC<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    type Request = A::Request;
-    type Response = B::Response;
-    type Error = A::Error;
-    type Future = AndThenServiceResponseRC<A, B>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, req: A::Request) -> Self::Future {
-        let fut = self.0.borrow_mut().0.call(req);
-        AndThenServiceResponseRC {
-            state: StateRC::A(fut, Some(self.0.clone())),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub(crate) struct AndThenServiceResponseRC<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    #[pin]
-    state: StateRC<A, B>,
-}
-
-#[pin_project::pin_project(project = StateRCProj)]
-enum StateRC<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    A(#[pin] A::Future, Option<Rc<RefCell<(A, B)>>>),
-    B(#[pin] B::Future),
-    Empty,
-}
-
-impl<A, B> Future for AndThenServiceResponseRC<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    type Output = Result<B::Response, A::Error>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.as_mut().project();
-
-        match this.state.as_mut().project() {
-            StateRCProj::A(fut, b) => match fut.poll(cx)? {
-                Poll::Ready(res) => {
-                    let b = b.take().unwrap();
-                    this.state.set(StateRC::Empty); // drop fut A
-                    let fut = b.borrow_mut().1.call(res);
-                    this.state.set(StateRC::B(fut));
-                    self.poll(cx)
-                }
-                Poll::Pending => Poll::Pending,
-            },
-            StateRCProj::B(fut) => fut.poll(cx).map(|r| {
-                this.state.set(StateRC::Empty);
-                r
-            }),
-            StateRCProj::Empty => {
-                panic!("future must not be polled after it returned `Poll::Ready`")
-            }
-        }
-    }
-}
-
-/*
- * AndThenRCFuture - AndThen service based on RefCell
- * and standard futures::future::and_then combinator in a Box
- */
-
-struct AndThenRCFuture<A, B>(Rc<RefCell<(A, B)>>);
-
-impl<A, B> AndThenRCFuture<A, B> {
-    fn new(a: A, b: B) -> Self
-    where
-        A: Service,
-        B: Service<Request = A::Response, Error = A::Error>,
-    {
-        Self(Rc::new(RefCell::new((a, b))))
-    }
-}
-
-impl<A, B> Clone for AndThenRCFuture<A, B> {
-    fn clone(&self) -> Self {
-        Self(self.0.clone())
-    }
-}
-
-impl<A, B> Service for AndThenRCFuture<A, B>
-where
-    A: Service + 'static,
-    A::Future: 'static,
-    B: Service<Request = A::Response, Error = A::Error> + 'static,
-    B::Future: 'static,
-{
-    type Request = A::Request;
-    type Response = B::Response;
-    type Error = A::Error;
-    type Future = BoxFuture<Self::Response, Self::Error>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, req: A::Request) -> Self::Future {
-        let fut = self.0.borrow_mut().0.call(req);
-        let core = self.0.clone();
-        let fut2 = move |res| (*core).borrow_mut().1.call(res);
-        Box::pin(fut.and_then(fut2))
-    }
-}
-
-/// Criterion Benchmark for async Service
-/// Should be used from within criterion group:
-/// ```rust,ignore
-/// let mut criterion: ::criterion::Criterion<_> =
-///     ::criterion::Criterion::default().configure_from_args();
-/// bench_async_service(&mut criterion, ok_service(), "async_service_direct");
-/// ```
-///
-/// Usable for benching Service wrappers:
-/// Using minimum service code implementation we first measure
-/// time to run minimum service, then measure time with wrapper.
-///
-/// Sample output
-/// async_service_direct    time:   [1.0908 us 1.1656 us 1.2613 us]
-pub fn bench_async_service<S>(c: &mut Criterion, srv: S, name: &str)
-where
-    S: Service<Request = (), Response = usize, Error = ()> + Clone + 'static,
-{
-    let mut rt = actix_rt::System::new("test");
-
-    // start benchmark loops
-    c.bench_function(name, move |b| {
-        b.iter_custom(|iters| {
-            let mut srvs: Vec<_> = (1..iters).map(|_| srv.clone()).collect();
-            // exclude request generation, it appears it takes significant time vs call (3us vs 1us)
-            let start = std::time::Instant::now();
-            // benchmark body
-            rt.block_on(async move { join_all(srvs.iter_mut().map(|srv| srv.call(()))).await });
-            // check that at least first request succeeded
-            start.elapsed()
-        })
-    });
-}
-
-pub fn service_benches() {
-    let mut criterion: ::criterion::Criterion<_> =
-        ::criterion::Criterion::default().configure_from_args();
-    bench_async_service(
-        &mut criterion,
-        AndThenUC::new(svc1.into_service(), svc2.into_service()),
-        "AndThen with UnsafeCell",
-    );
-    bench_async_service(
-        &mut criterion,
-        AndThenRC::new(svc1.into_service(), svc2.into_service()),
-        "AndThen with RefCell",
-    );
-    bench_async_service(
-        &mut criterion,
-        AndThenUC::new(svc1.into_service(), svc2.into_service()),
-        "AndThen with UnsafeCell",
-    );
-    bench_async_service(
-        &mut criterion,
-        AndThenRC::new(svc1.into_service(), svc2.into_service()),
-        "AndThen with RefCell",
-    );
-    bench_async_service(
-        &mut criterion,
-        AndThenRCFuture::new(svc1.into_service(), svc2.into_service()),
-        "AndThen with RefCell via future::and_then",
-    );
-}
-
-criterion_main!(service_benches);

actix-service/benches/unsafecell_vs_refcell.rs

@@ -1,112 +0,0 @@
-use actix_service::Service;
-use criterion::{criterion_main, Criterion};
-use futures_util::future::join_all;
-use futures_util::future::{ok, Ready};
-use std::cell::{RefCell, UnsafeCell};
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-struct SrvUC(Rc<UnsafeCell<usize>>);
-
-impl Default for SrvUC {
-    fn default() -> Self {
-        Self(Rc::new(UnsafeCell::new(0)))
-    }
-}
-
-impl Clone for SrvUC {
-    fn clone(&self) -> Self {
-        Self(self.0.clone())
-    }
-}
-
-impl Service for SrvUC {
-    type Request = ();
-    type Response = usize;
-    type Error = ();
-    type Future = Ready<Result<Self::Response, ()>>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, _: ()) -> Self::Future {
-        unsafe { *(*self.0).get() = *(*self.0).get() + 1 };
-        ok(unsafe { *self.0.get() })
-    }
-}
-
-struct SrvRC(Rc<RefCell<usize>>);
-
-impl Default for SrvRC {
-    fn default() -> Self {
-        Self(Rc::new(RefCell::new(0)))
-    }
-}
-
-impl Clone for SrvRC {
-    fn clone(&self) -> Self {
-        Self(self.0.clone())
-    }
-}
-
-impl Service for SrvRC {
-    type Request = ();
-    type Response = usize;
-    type Error = ();
-    type Future = Ready<Result<Self::Response, ()>>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, _: ()) -> Self::Future {
-        let prev = *self.0.borrow();
-        *(*self.0).borrow_mut() = prev + 1;
-        ok(*self.0.borrow())
-    }
-}
-
-/// Criterion Benchmark for async Service
-/// Should be used from within criterion group:
-/// ```rust,ignore
-/// let mut criterion: ::criterion::Criterion<_> =
-///     ::criterion::Criterion::default().configure_from_args();
-/// bench_async_service(&mut criterion, ok_service(), "async_service_direct");
-/// ```
-///
-/// Usable for benching Service wrappers:
-/// Using minimum service code implementation we first measure
-/// time to run minimum service, then measure time with wrapper.
-///
-/// Sample output
-/// async_service_direct    time:   [1.0908 us 1.1656 us 1.2613 us]
-pub fn bench_async_service<S>(c: &mut Criterion, srv: S, name: &str)
-where
-    S: Service<Request = (), Response = usize, Error = ()> + Clone + 'static,
-{
-    let mut rt = actix_rt::System::new("test");
-
-    // start benchmark loops
-    c.bench_function(name, move |b| {
-        b.iter_custom(|iters| {
-            let mut srvs: Vec<_> = (1..iters).map(|_| srv.clone()).collect();
-            // exclude request generation, it appears it takes significant time vs call (3us vs 1us)
-            let start = std::time::Instant::now();
-            // benchmark body
-            rt.block_on(async move { join_all(srvs.iter_mut().map(|srv| srv.call(()))).await });
-            // check that at least first request succeeded
-            start.elapsed()
-        })
-    });
-}
-
-pub fn service_benches() {
-    let mut criterion: ::criterion::Criterion<_> =
-        ::criterion::Criterion::default().configure_from_args();
-    bench_async_service(&mut criterion, SrvUC::default(), "Service with UnsafeCell");
-    bench_async_service(&mut criterion, SrvRC::default(), "Service with RefCell");
-    bench_async_service(&mut criterion, SrvUC::default(), "Service with UnsafeCell");
-    bench_async_service(&mut criterion, SrvRC::default(), "Service with RefCell");
-}
-criterion_main!(service_benches);

actix-service/src/and_then.rs

@@ -1,8 +1,13 @@
-use std::cell::RefCell;
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
+use alloc::rc::Rc;
+use core::{
+    cell::RefCell,
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::{Service, ServiceFactory};
 
@@ -10,34 +15,33 @@ use super::{Service, ServiceFactory};
 /// of another service which completes successfully.
 ///
 /// This is created by the `Pipeline::and_then` method.
-pub(crate) struct AndThenService<A, B>(Rc<RefCell<(A, B)>>);
+pub(crate) struct AndThenService<A, B, Req>(Rc<RefCell<(A, B)>>, PhantomData<Req>);
 
-impl<A, B> AndThenService<A, B> {
+impl<A, B, Req> AndThenService<A, B, Req> {
     /// Create new `AndThen` combinator
     pub(crate) fn new(a: A, b: B) -> Self
     where
-        A: Service,
-        B: Service<Request = A::Response, Error = A::Error>,
+        A: Service<Req>,
+        B: Service<A::Response, Error = A::Error>,
     {
-        Self(Rc::new(RefCell::new((a, b))))
+        Self(Rc::new(RefCell::new((a, b))), PhantomData)
     }
 }
 
-impl<A, B> Clone for AndThenService<A, B> {
+impl<A, B, Req> Clone for AndThenService<A, B, Req> {
     fn clone(&self) -> Self {
-        AndThenService(self.0.clone())
+        AndThenService(self.0.clone(), PhantomData)
     }
 }
 
-impl<A, B> Service for AndThenService<A, B>
+impl<A, B, Req> Service<Req> for AndThenService<A, B, Req>
 where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
+    A: Service<Req>,
+    B: Service<A::Response, Error = A::Error>,
 {
-    type Request = A::Request;
     type Response = B::Response;
     type Error = A::Error;
-    type Future = AndThenServiceResponse<A, B>;
+    type Future = AndThenServiceResponse<A, B, Req>;
 
     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         let mut srv = self.0.borrow_mut();
@@ -49,38 +53,51 @@ where
         }
     }
 
-    fn call(&mut self, req: A::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         AndThenServiceResponse {
-            state: State::A(self.0.borrow_mut().0.call(req), Some(self.0.clone())),
+            state: State::A {
+                fut: self.0.borrow_mut().0.call(req),
+                b: Some(self.0.clone()),
+            },
         }
     }
 }
 
-#[pin_project::pin_project]
-pub(crate) struct AndThenServiceResponse<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    #[pin]
-    state: State<A, B>,
+pin_project! {
+    pub(crate) struct AndThenServiceResponse<A, B, Req>
+    where
+        A: Service<Req>,
+        B: Service<A::Response, Error = A::Error>,
+    {
+        #[pin]
+        state: State<A, B, Req>,
+    }
 }
 
-#[pin_project::pin_project(project = StateProj)]
-enum State<A, B>
-where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
-{
-    A(#[pin] A::Future, Option<Rc<RefCell<(A, B)>>>),
-    B(#[pin] B::Future),
-    Empty,
+pin_project! {
+    #[project = StateProj]
+    enum State<A, B, Req>
+    where
+        A: Service<Req>,
+        B: Service<A::Response, Error = A::Error>,
+    {
+        A {
+            #[pin]
+            fut: A::Future,
+            b: Option<Rc<RefCell<(A, B)>>>,
+        },
+        B {
+            #[pin]
+            fut: B::Future,
+        },
+        Empty,
+    }
 }
 
-impl<A, B> Future for AndThenServiceResponse<A, B>
+impl<A, B, Req> Future for AndThenServiceResponse<A, B, Req>
 where
-    A: Service,
-    B: Service<Request = A::Response, Error = A::Error>,
+    A: Service<Req>,
+    B: Service<A::Response, Error = A::Error>,
 {
     type Output = Result<B::Response, A::Error>;
 
@@ -88,17 +105,17 @@ where
         let mut this = self.as_mut().project();
 
         match this.state.as_mut().project() {
-            StateProj::A(fut, b) => match fut.poll(cx)? {
+            StateProj::A { fut, b } => match fut.poll(cx)? {
                 Poll::Ready(res) => {
                     let b = b.take().unwrap();
                     this.state.set(State::Empty); // drop fut A
                     let fut = b.borrow_mut().1.call(res);
-                    this.state.set(State::B(fut));
+                    this.state.set(State::B { fut });
                     self.poll(cx)
                 }
                 Poll::Pending => Poll::Pending,
             },
-            StateProj::B(fut) => fut.poll(cx).map(|r| {
+            StateProj::B { fut } => fut.poll(cx).map(|r| {
                 this.state.set(State::Empty);
                 r
             }),
@@ -110,27 +127,28 @@ where
 }
 
 /// `.and_then()` service factory combinator
-pub(crate) struct AndThenServiceFactory<A, B>
+pub(crate) struct AndThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        A::Response,
         Config = A::Config,
-        Request = A::Response,
         Error = A::Error,
         InitError = A::InitError,
     >,
 {
     inner: Rc<(A, B)>,
+    _phantom: PhantomData<Req>,
 }
 
-impl<A, B> AndThenServiceFactory<A, B>
+impl<A, B, Req> AndThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        A::Response,
         Config = A::Config,
-        Request = A::Response,
         Error = A::Error,
         InitError = A::InitError,
     >,
@@ -139,29 +157,29 @@ where
     pub(crate) fn new(a: A, b: B) -> Self {
         Self {
             inner: Rc::new((a, b)),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<A, B> ServiceFactory for AndThenServiceFactory<A, B>
+impl<A, B, Req> ServiceFactory<Req> for AndThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        A::Response,
         Config = A::Config,
-        Request = A::Response,
         Error = A::Error,
         InitError = A::InitError,
     >,
 {
-    type Request = A::Request;
     type Response = B::Response;
     type Error = A::Error;
 
     type Config = A::Config;
-    type Service = AndThenService<A::Service, B::Service>;
+    type Service = AndThenService<A::Service, B::Service, Req>;
     type InitError = A::InitError;
-    type Future = AndThenServiceFactoryResponse<A, B>;
+    type Future = AndThenServiceFactoryResponse<A, B, Req>;
 
     fn new_service(&self, cfg: A::Config) -> Self::Future {
         let inner = &*self.inner;
@@ -172,13 +190,13 @@ where
     }
 }
 
-impl<A, B> Clone for AndThenServiceFactory<A, B>
+impl<A, B, Req> Clone for AndThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        A::Response,
         Config = A::Config,
-        Request = A::Response,
         Error = A::Error,
         InitError = A::InitError,
     >,
@@ -186,29 +204,31 @@ where
     fn clone(&self) -> Self {
         Self {
             inner: self.inner.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-#[pin_project::pin_project]
-pub(crate) struct AndThenServiceFactoryResponse<A, B>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<Request = A::Response>,
-{
-    #[pin]
-    fut_a: A::Future,
-    #[pin]
-    fut_b: B::Future,
+pin_project! {
+    pub(crate) struct AndThenServiceFactoryResponse<A, B, Req>
+    where
+        A: ServiceFactory<Req>,
+        B: ServiceFactory<A::Response>,
+    {
+        #[pin]
+        fut_a: A::Future,
+        #[pin]
+        fut_b: B::Future,
 
-    a: Option<A::Service>,
-    b: Option<B::Service>,
+        a: Option<A::Service>,
+        b: Option<B::Service>,
+    }
 }
 
-impl<A, B> AndThenServiceFactoryResponse<A, B>
+impl<A, B, Req> AndThenServiceFactoryResponse<A, B, Req>
 where
-    A: ServiceFactory,
-    B: ServiceFactory<Request = A::Response>,
+    A: ServiceFactory<Req>,
+    B: ServiceFactory<A::Response>,
 {
     fn new(fut_a: A::Future, fut_b: B::Future) -> Self {
         AndThenServiceFactoryResponse {
@@ -220,12 +240,12 @@ where
     }
 }
 
-impl<A, B> Future for AndThenServiceFactoryResponse<A, B>
+impl<A, B, Req> Future for AndThenServiceFactoryResponse<A, B, Req>
 where
-    A: ServiceFactory,
-    B: ServiceFactory<Request = A::Response, Error = A::Error, InitError = A::InitError>,
+    A: ServiceFactory<Req>,
+    B: ServiceFactory<A::Response, Error = A::Error, InitError = A::InitError>,
 {
-    type Output = Result<AndThenService<A::Service, B::Service>, A::InitError>;
+    type Output = Result<AndThenService<A::Service, B::Service, Req>, A::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
@@ -253,18 +273,21 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::cell::Cell;
-    use std::rc::Rc;
-    use std::task::{Context, Poll};
+    use alloc::rc::Rc;
+    use core::{
+        cell::Cell,
+        task::{Context, Poll},
+    };
 
-    use futures_util::future::{lazy, ok, ready, Ready};
+    use futures_util::future::lazy;
 
-    use crate::{fn_factory, pipeline, pipeline_factory, Service, ServiceFactory};
+    use crate::{
+        fn_factory, ok, pipeline, pipeline_factory, ready, Ready, Service, ServiceFactory,
+    };
 
     struct Srv1(Rc<Cell<usize>>);
 
-    impl Service for Srv1 {
-        type Request = &'static str;
+    impl Service<&'static str> for Srv1 {
         type Response = &'static str;
         type Error = ();
         type Future = Ready<Result<Self::Response, ()>>;
@@ -282,8 +305,7 @@ mod tests {
     #[derive(Clone)]
     struct Srv2(Rc<Cell<usize>>);
 
-    impl Service for Srv2 {
-        type Request = &'static str;
+    impl Service<&'static str> for Srv2 {
         type Response = (&'static str, &'static str);
         type Error = ();
         type Future = Ready<Result<Self::Response, ()>>;

actix-service/src/and_then_apply_fn.rs

@@ -1,326 +0,0 @@
-use std::cell::RefCell;
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-use crate::{Service, ServiceFactory};
-
-/// `Apply` service combinator
-pub(crate) struct AndThenApplyFn<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    srv: Rc<RefCell<(A, B, F)>>,
-    r: PhantomData<(Fut, Res, Err)>,
-}
-
-impl<A, B, F, Fut, Res, Err> AndThenApplyFn<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    /// Create new `Apply` combinator
-    pub(crate) fn new(a: A, b: B, f: F) -> Self {
-        Self {
-            srv: Rc::new(RefCell::new((a, b, f))),
-            r: PhantomData,
-        }
-    }
-}
-
-impl<A, B, F, Fut, Res, Err> Clone for AndThenApplyFn<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    fn clone(&self) -> Self {
-        AndThenApplyFn {
-            srv: self.srv.clone(),
-            r: PhantomData,
-        }
-    }
-}
-
-impl<A, B, F, Fut, Res, Err> Service for AndThenApplyFn<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    type Request = A::Request;
-    type Response = Res;
-    type Error = Err;
-    type Future = AndThenApplyFnFuture<A, B, F, Fut, Res, Err>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        let mut inner = self.srv.borrow_mut();
-        let not_ready = inner.0.poll_ready(cx)?.is_pending();
-        if inner.1.poll_ready(cx)?.is_pending() || not_ready {
-            Poll::Pending
-        } else {
-            Poll::Ready(Ok(()))
-        }
-    }
-
-    fn call(&mut self, req: A::Request) -> Self::Future {
-        let fut = self.srv.borrow_mut().0.call(req);
-        AndThenApplyFnFuture {
-            state: State::A(fut, Some(self.srv.clone())),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub(crate) struct AndThenApplyFnFuture<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error>,
-    Err: From<B::Error>,
-{
-    #[pin]
-    state: State<A, B, F, Fut, Res, Err>,
-}
-
-#[pin_project::pin_project(project = StateProj)]
-enum State<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error>,
-    Err: From<B::Error>,
-{
-    A(#[pin] A::Future, Option<Rc<RefCell<(A, B, F)>>>),
-    B(#[pin] Fut),
-    Empty,
-}
-
-impl<A, B, F, Fut, Res, Err> Future for AndThenApplyFnFuture<A, B, F, Fut, Res, Err>
-where
-    A: Service,
-    B: Service,
-    F: FnMut(A::Response, &mut B) -> Fut,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    type Output = Result<Res, Err>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.as_mut().project();
-
-        match this.state.as_mut().project() {
-            StateProj::A(fut, b) => match fut.poll(cx)? {
-                Poll::Ready(res) => {
-                    let b = b.take().unwrap();
-                    this.state.set(State::Empty);
-                    let (_, b, f) = &mut *b.borrow_mut();
-                    let fut = f(res, b);
-                    this.state.set(State::B(fut));
-                    self.poll(cx)
-                }
-                Poll::Pending => Poll::Pending,
-            },
-            StateProj::B(fut) => fut.poll(cx).map(|r| {
-                this.state.set(State::Empty);
-                r
-            }),
-            StateProj::Empty => {
-                panic!("future must not be polled after it returned `Poll::Ready`")
-            }
-        }
-    }
-}
-
-/// `AndThenApplyFn` service factory
-pub(crate) struct AndThenApplyFnFactory<A, B, F, Fut, Res, Err> {
-    srv: Rc<(A, B, F)>,
-    r: PhantomData<(Fut, Res, Err)>,
-}
-
-impl<A, B, F, Fut, Res, Err> AndThenApplyFnFactory<A, B, F, Fut, Res, Err>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<Config = A::Config, InitError = A::InitError>,
-    F: FnMut(A::Response, &mut B::Service) -> Fut + Clone,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    /// Create new `ApplyNewService` new service instance
-    pub(crate) fn new(a: A, b: B, f: F) -> Self {
-        Self {
-            srv: Rc::new((a, b, f)),
-            r: PhantomData,
-        }
-    }
-}
-
-impl<A, B, F, Fut, Res, Err> Clone for AndThenApplyFnFactory<A, B, F, Fut, Res, Err> {
-    fn clone(&self) -> Self {
-        Self {
-            srv: self.srv.clone(),
-            r: PhantomData,
-        }
-    }
-}
-
-impl<A, B, F, Fut, Res, Err> ServiceFactory for AndThenApplyFnFactory<A, B, F, Fut, Res, Err>
-where
-    A: ServiceFactory,
-    A::Config: Clone,
-    B: ServiceFactory<Config = A::Config, InitError = A::InitError>,
-    F: FnMut(A::Response, &mut B::Service) -> Fut + Clone,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    type Request = A::Request;
-    type Response = Res;
-    type Error = Err;
-    type Service = AndThenApplyFn<A::Service, B::Service, F, Fut, Res, Err>;
-    type Config = A::Config;
-    type InitError = A::InitError;
-    type Future = AndThenApplyFnFactoryResponse<A, B, F, Fut, Res, Err>;
-
-    fn new_service(&self, cfg: A::Config) -> Self::Future {
-        let srv = &*self.srv;
-        AndThenApplyFnFactoryResponse {
-            a: None,
-            b: None,
-            f: srv.2.clone(),
-            fut_a: srv.0.new_service(cfg.clone()),
-            fut_b: srv.1.new_service(cfg),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub(crate) struct AndThenApplyFnFactoryResponse<A, B, F, Fut, Res, Err>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<Config = A::Config, InitError = A::InitError>,
-    F: FnMut(A::Response, &mut B::Service) -> Fut + Clone,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error>,
-    Err: From<B::Error>,
-{
-    #[pin]
-    fut_b: B::Future,
-    #[pin]
-    fut_a: A::Future,
-    f: F,
-    a: Option<A::Service>,
-    b: Option<B::Service>,
-}
-
-impl<A, B, F, Fut, Res, Err> Future for AndThenApplyFnFactoryResponse<A, B, F, Fut, Res, Err>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<Config = A::Config, InitError = A::InitError>,
-    F: FnMut(A::Response, &mut B::Service) -> Fut + Clone,
-    Fut: Future<Output = Result<Res, Err>>,
-    Err: From<A::Error> + From<B::Error>,
-{
-    type Output =
-        Result<AndThenApplyFn<A::Service, B::Service, F, Fut, Res, Err>, A::InitError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.project();
-
-        if this.a.is_none() {
-            if let Poll::Ready(service) = this.fut_a.poll(cx)? {
-                *this.a = Some(service);
-            }
-        }
-
-        if this.b.is_none() {
-            if let Poll::Ready(service) = this.fut_b.poll(cx)? {
-                *this.b = Some(service);
-            }
-        }
-
-        if this.a.is_some() && this.b.is_some() {
-            Poll::Ready(Ok(AndThenApplyFn {
-                srv: Rc::new(RefCell::new((
-                    this.a.take().unwrap(),
-                    this.b.take().unwrap(),
-                    this.f.clone(),
-                ))),
-                r: PhantomData,
-            }))
-        } else {
-            Poll::Pending
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use futures_util::future::{lazy, ok, Ready, TryFutureExt};
-
-    use crate::{fn_service, pipeline, pipeline_factory, Service, ServiceFactory};
-
-    #[derive(Clone)]
-    struct Srv;
-    impl Service for Srv {
-        type Request = ();
-        type Response = ();
-        type Error = ();
-        type Future = Ready<Result<(), ()>>;
-
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
-
-        #[allow(clippy::unit_arg)]
-        fn call(&mut self, req: Self::Request) -> Self::Future {
-            ok(req)
-        }
-    }
-
-    #[actix_rt::test]
-    async fn test_service() {
-        let mut srv = pipeline(ok).and_then_apply_fn(Srv, |req: &'static str, s| {
-            s.call(()).map_ok(move |res| (req, res))
-        });
-        let res = lazy(|cx| srv.poll_ready(cx)).await;
-        assert_eq!(res, Poll::Ready(Ok(())));
-
-        let res = srv.call("srv").await;
-        assert!(res.is_ok());
-        assert_eq!(res.unwrap(), ("srv", ()));
-    }
-
-    #[actix_rt::test]
-    async fn test_service_factory() {
-        let new_srv = pipeline_factory(|| ok::<_, ()>(fn_service(ok))).and_then_apply_fn(
-            || ok(Srv),
-            |req: &'static str, s| s.call(()).map_ok(move |res| (req, res)),
-        );
-        let mut srv = new_srv.new_service(()).await.unwrap();
-        let res = lazy(|cx| srv.poll_ready(cx)).await;
-        assert_eq!(res, Poll::Ready(Ok(())));
-
-        let res = srv.call("srv").await;
-        assert!(res.is_ok());
-        assert_eq!(res.unwrap(), ("srv", ()));
-    }
-}

actix-service/src/apply.rs

@@ -1,227 +1,230 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use futures_core::ready;
+use pin_project_lite::pin_project;
 
 use super::{IntoService, IntoServiceFactory, Service, ServiceFactory};
 
 /// Apply transform function to a service.
-pub fn apply_fn<T, F, R, In, Out, Err, U>(service: U, f: F) -> Apply<T, F, R, In, Out, Err>
+///
+/// The In and Out type params refer to the request and response types for the wrapped service.
+pub fn apply_fn<I, S, F, Fut, Req, In, Res, Err>(
+    service: I,
+    wrap_fn: F,
+) -> Apply<S, F, Req, In, Res, Err>
 where
-    T: Service<Error = Err>,
-    F: FnMut(In, &mut T) -> R,
-    R: Future<Output = Result<Out, Err>>,
-    U: IntoService<T>,
+    I: IntoService<S, In>,
+    S: Service<In, Error = Err>,
+    F: FnMut(Req, &mut S) -> Fut,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    Apply::new(service.into_service(), f)
+    Apply::new(service.into_service(), wrap_fn)
 }
 
 /// Service factory that produces `apply_fn` service.
-pub fn apply_fn_factory<T, F, R, In, Out, Err, U>(
-    service: U,
+///
+/// The In and Out type params refer to the request and response types for the wrapped service.
+pub fn apply_fn_factory<I, SF, F, Fut, Req, In, Res, Err>(
+    service: I,
     f: F,
-) -> ApplyServiceFactory<T, F, R, In, Out, Err>
+) -> ApplyFactory<SF, F, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
-    U: IntoServiceFactory<T>,
+    I: IntoServiceFactory<SF, In>,
+    SF: ServiceFactory<In, Error = Err>,
+    F: FnMut(Req, &mut SF::Service) -> Fut + Clone,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    ApplyServiceFactory::new(service.into_factory(), f)
+    ApplyFactory::new(service.into_factory(), f)
 }
 
-/// `Apply` service combinator
-pub struct Apply<T, F, R, In, Out, Err>
+/// `Apply` service combinator.
+///
+/// The In and Out type params refer to the request and response types for the wrapped service.
+pub struct Apply<S, F, Req, In, Res, Err>
 where
-    T: Service<Error = Err>,
+    S: Service<In, Error = Err>,
 {
-    service: T,
-    f: F,
-    r: PhantomData<(In, Out, R)>,
+    service: S,
+    wrap_fn: F,
+    _phantom: PhantomData<(Req, In, Res, Err)>,
 }
 
-impl<T, F, R, In, Out, Err> Apply<T, F, R, In, Out, Err>
+impl<S, F, Fut, Req, In, Res, Err> Apply<S, F, Req, In, Res, Err>
 where
-    T: Service<Error = Err>,
-    F: FnMut(In, &mut T) -> R,
-    R: Future<Output = Result<Out, Err>>,
+    S: Service<In, Error = Err>,
+    F: FnMut(Req, &mut S) -> Fut,
+    Fut: Future<Output = Result<Res, Err>>,
 {
     /// Create new `Apply` combinator
-    fn new(service: T, f: F) -> Self {
+    fn new(service: S, wrap_fn: F) -> Self {
         Self {
             service,
-            f,
-            r: PhantomData,
+            wrap_fn,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, F, R, In, Out, Err> Clone for Apply<T, F, R, In, Out, Err>
+impl<S, F, Fut, Req, In, Res, Err> Clone for Apply<S, F, Req, In, Res, Err>
 where
-    T: Service<Error = Err> + Clone,
-    F: FnMut(In, &mut T) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
+    S: Service<In, Error = Err> + Clone,
+    F: FnMut(Req, &mut S) -> Fut + Clone,
+    Fut: Future<Output = Result<Res, Err>>,
 {
     fn clone(&self) -> Self {
         Apply {
             service: self.service.clone(),
-            f: self.f.clone(),
-            r: PhantomData,
+            wrap_fn: self.wrap_fn.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, F, R, In, Out, Err> Service for Apply<T, F, R, In, Out, Err>
+impl<S, F, Fut, Req, In, Res, Err> Service<Req> for Apply<S, F, Req, In, Res, Err>
 where
-    T: Service<Error = Err>,
-    F: FnMut(In, &mut T) -> R,
-    R: Future<Output = Result<Out, Err>>,
+    S: Service<In, Error = Err>,
+    F: FnMut(Req, &mut S) -> Fut,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    type Request = In;
-    type Response = Out;
+    type Response = Res;
     type Error = Err;
-    type Future = R;
+    type Future = Fut;
 
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(futures_util::ready!(self.service.poll_ready(cx)))
-    }
+    crate::forward_ready!(service);
 
-    fn call(&mut self, req: In) -> Self::Future {
-        (self.f)(req, &mut self.service)
+    fn call(&mut self, req: Req) -> Self::Future {
+        (self.wrap_fn)(req, &mut self.service)
     }
 }
 
-/// `apply()` service factory
-pub struct ApplyServiceFactory<T, F, R, In, Out, Err>
-where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
-{
-    service: T,
-    f: F,
-    r: PhantomData<(R, In, Out)>,
+/// `ApplyFactory` service factory combinator.
+pub struct ApplyFactory<SF, F, Req, In, Res, Err> {
+    factory: SF,
+    wrap_fn: F,
+    _phantom: PhantomData<(Req, In, Res, Err)>,
 }
 
-impl<T, F, R, In, Out, Err> ApplyServiceFactory<T, F, R, In, Out, Err>
+impl<SF, F, Fut, Req, In, Res, Err> ApplyFactory<SF, F, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
+    SF: ServiceFactory<In, Error = Err>,
+    F: FnMut(Req, &mut SF::Service) -> Fut + Clone,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    /// Create new `ApplyNewService` new service instance
-    fn new(service: T, f: F) -> Self {
+    /// Create new `ApplyFactory` new service instance
+    fn new(factory: SF, wrap_fn: F) -> Self {
         Self {
-            f,
-            service,
-            r: PhantomData,
+            factory,
+            wrap_fn,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, F, R, In, Out, Err> Clone for ApplyServiceFactory<T, F, R, In, Out, Err>
+impl<SF, F, Fut, Req, In, Res, Err> Clone for ApplyFactory<SF, F, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err> + Clone,
-    F: FnMut(In, &mut T::Service) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
+    SF: ServiceFactory<In, Error = Err> + Clone,
+    F: FnMut(Req, &mut SF::Service) -> Fut + Clone,
+    Fut: Future<Output = Result<Res, Err>>,
 {
     fn clone(&self) -> Self {
         Self {
-            service: self.service.clone(),
-            f: self.f.clone(),
-            r: PhantomData,
+            factory: self.factory.clone(),
+            wrap_fn: self.wrap_fn.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, F, R, In, Out, Err> ServiceFactory for ApplyServiceFactory<T, F, R, In, Out, Err>
+impl<SF, F, Fut, Req, In, Res, Err> ServiceFactory<Req>
+    for ApplyFactory<SF, F, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R + Clone,
-    R: Future<Output = Result<Out, Err>>,
+    SF: ServiceFactory<In, Error = Err>,
+    F: FnMut(Req, &mut SF::Service) -> Fut + Clone,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    type Request = In;
-    type Response = Out;
+    type Response = Res;
     type Error = Err;
 
-    type Config = T::Config;
-    type Service = Apply<T::Service, F, R, In, Out, Err>;
-    type InitError = T::InitError;
-    type Future = ApplyServiceFactoryResponse<T, F, R, In, Out, Err>;
+    type Config = SF::Config;
+    type Service = Apply<SF::Service, F, Req, In, Res, Err>;
+    type InitError = SF::InitError;
+    type Future = ApplyServiceFactoryResponse<SF, F, Fut, Req, In, Res, Err>;
 
-    fn new_service(&self, cfg: T::Config) -> Self::Future {
-        ApplyServiceFactoryResponse::new(self.service.new_service(cfg), self.f.clone())
+    fn new_service(&self, cfg: SF::Config) -> Self::Future {
+        let svc = self.factory.new_service(cfg);
+        ApplyServiceFactoryResponse::new(svc, self.wrap_fn.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct ApplyServiceFactoryResponse<T, F, R, In, Out, Err>
-where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R,
-    R: Future<Output = Result<Out, Err>>,
-{
-    #[pin]
-    fut: T::Future,
-    f: Option<F>,
-    r: PhantomData<(In, Out)>,
+pin_project! {
+    pub struct ApplyServiceFactoryResponse<SF, F, Fut, Req, In, Res, Err>
+    where
+        SF: ServiceFactory<In, Error = Err>,
+        F: FnMut(Req, &mut SF::Service) -> Fut,
+        Fut: Future<Output = Result<Res, Err>>,
+    {
+        #[pin]
+        fut: SF::Future,
+        wrap_fn: Option<F>,
+        _phantom: PhantomData<(Req, Res)>,
+    }
 }
 
-impl<T, F, R, In, Out, Err> ApplyServiceFactoryResponse<T, F, R, In, Out, Err>
+impl<SF, F, Fut, Req, In, Res, Err> ApplyServiceFactoryResponse<SF, F, Fut, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R,
-    R: Future<Output = Result<Out, Err>>,
+    SF: ServiceFactory<In, Error = Err>,
+    F: FnMut(Req, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    fn new(fut: T::Future, f: F) -> Self {
+    fn new(fut: SF::Future, wrap_fn: F) -> Self {
         Self {
-            f: Some(f),
             fut,
-            r: PhantomData,
+            wrap_fn: Some(wrap_fn),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, F, R, In, Out, Err> Future for ApplyServiceFactoryResponse<T, F, R, In, Out, Err>
+impl<SF, F, Fut, Req, In, Res, Err> Future
+    for ApplyServiceFactoryResponse<SF, F, Fut, Req, In, Res, Err>
 where
-    T: ServiceFactory<Error = Err>,
-    F: FnMut(In, &mut T::Service) -> R,
-    R: Future<Output = Result<Out, Err>>,
+    SF: ServiceFactory<In, Error = Err>,
+    F: FnMut(Req, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<Res, Err>>,
 {
-    type Output = Result<Apply<T::Service, F, R, In, Out, Err>, T::InitError>;
+    type Output = Result<Apply<SF::Service, F, Req, In, Res, Err>, SF::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
-        if let Poll::Ready(svc) = this.fut.poll(cx)? {
-            Poll::Ready(Ok(Apply::new(svc, this.f.take().unwrap())))
-        } else {
-            Poll::Pending
-        }
+        let svc = ready!(this.fut.poll(cx))?;
+        Poll::Ready(Ok(Apply::new(svc, this.wrap_fn.take().unwrap())))
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use std::task::{Context, Poll};
+    use core::task::Poll;
 
-    use futures_util::future::{lazy, ok, Ready};
+    use futures_util::future::lazy;
 
     use super::*;
-    use crate::{pipeline, pipeline_factory, Service, ServiceFactory};
+    use crate::{ok, pipeline, pipeline_factory, Ready, Service, ServiceFactory};
 
     #[derive(Clone)]
     struct Srv;
 
-    impl Service for Srv {
-        type Request = ();
+    impl Service<()> for Srv {
         type Response = ();
         type Error = ();
         type Future = Ready<Result<(), ()>>;
 
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
+        crate::always_ready!();
 
         fn call(&mut self, _: ()) -> Self::Future {
             ok(())

actix-service/src/apply_cfg.rs

@@ -1,227 +1,237 @@
-use std::cell::RefCell;
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
+use alloc::rc::Rc;
+use core::{
+    cell::RefCell,
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use crate::{Service, ServiceFactory};
 
-/// Convert `Fn(Config, &mut Service1) -> Future<Service2>` fn to a service factory
-pub fn apply_cfg<F, C, T, R, S, E>(
-    srv: T,
+/// Convert `Fn(Config, &mut Service1) -> Future<Service2>` fn to a service factory.
+pub fn apply_cfg<S1, Req, F, Cfg, Fut, S2, Err>(
+    srv: S1,
     f: F,
 ) -> impl ServiceFactory<
-    Config = C,
-    Request = S::Request,
-    Response = S::Response,
-    Error = S::Error,
-    Service = S,
-    InitError = E,
-    Future = R,
+    Req,
+    Config = Cfg,
+    Response = S2::Response,
+    Error = S2::Error,
+    Service = S2,
+    InitError = Err,
+    Future = Fut,
 > + Clone
 where
-    F: FnMut(C, &mut T) -> R,
-    T: Service,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    S1: Service<Req>,
+    F: FnMut(Cfg, &mut S1) -> Fut,
+    Fut: Future<Output = Result<S2, Err>>,
+    S2: Service<Req>,
 {
     ApplyConfigService {
         srv: Rc::new(RefCell::new((srv, f))),
-        _t: PhantomData,
+        _phantom: PhantomData,
     }
 }
 
-/// Convert `Fn(Config, &mut Service1) -> Future<Service2>` fn to a service factory
+/// Convert `Fn(Config, &mut ServiceFactory1) -> Future<ServiceFactory2>` fn to a service factory.
 ///
 /// Service1 get constructed from `T` factory.
-pub fn apply_cfg_factory<F, C, T, R, S>(
-    factory: T,
+pub fn apply_cfg_factory<SF, Req, F, Cfg, Fut, S>(
+    factory: SF,
     f: F,
 ) -> impl ServiceFactory<
-    Config = C,
-    Request = S::Request,
+    Req,
+    Config = Cfg,
     Response = S::Response,
     Error = S::Error,
     Service = S,
-    InitError = T::InitError,
+    InitError = SF::InitError,
 > + Clone
 where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    T::InitError: From<T::Error>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
+    SF: ServiceFactory<Req, Config = ()>,
+    F: FnMut(Cfg, &mut SF::Service) -> Fut,
+    SF::InitError: From<SF::Error>,
+    Fut: Future<Output = Result<S, SF::InitError>>,
+    S: Service<Req>,
 {
     ApplyConfigServiceFactory {
         srv: Rc::new(RefCell::new((factory, f))),
-        _t: PhantomData,
+        _phantom: PhantomData,
     }
 }
 
 /// Convert `Fn(Config, &mut Server) -> Future<Service>` fn to NewService\
-struct ApplyConfigService<F, C, T, R, S, E>
+struct ApplyConfigService<S1, Req, F, Cfg, Fut, S2, Err>
 where
-    F: FnMut(C, &mut T) -> R,
-    T: Service,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    S1: Service<Req>,
+    F: FnMut(Cfg, &mut S1) -> Fut,
+    Fut: Future<Output = Result<S2, Err>>,
+    S2: Service<Req>,
 {
-    srv: Rc<RefCell<(T, F)>>,
-    _t: PhantomData<(C, R, S)>,
+    srv: Rc<RefCell<(S1, F)>>,
+    _phantom: PhantomData<(Cfg, Req, Fut, S2)>,
 }
 
-impl<F, C, T, R, S, E> Clone for ApplyConfigService<F, C, T, R, S, E>
+impl<S1, Req, F, Cfg, Fut, S2, Err> Clone for ApplyConfigService<S1, Req, F, Cfg, Fut, S2, Err>
 where
-    F: FnMut(C, &mut T) -> R,
-    T: Service,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    S1: Service<Req>,
+    F: FnMut(Cfg, &mut S1) -> Fut,
+    Fut: Future<Output = Result<S2, Err>>,
+    S2: Service<Req>,
 {
     fn clone(&self) -> Self {
         ApplyConfigService {
             srv: self.srv.clone(),
-            _t: PhantomData,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<F, C, T, R, S, E> ServiceFactory for ApplyConfigService<F, C, T, R, S, E>
+impl<S1, Req, F, Cfg, Fut, S2, Err> ServiceFactory<Req>
+    for ApplyConfigService<S1, Req, F, Cfg, Fut, S2, Err>
 where
-    F: FnMut(C, &mut T) -> R,
-    T: Service,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    S1: Service<Req>,
+    F: FnMut(Cfg, &mut S1) -> Fut,
+    Fut: Future<Output = Result<S2, Err>>,
+    S2: Service<Req>,
 {
-    type Config = C;
-    type Request = S::Request;
-    type Response = S::Response;
-    type Error = S::Error;
-    type Service = S;
+    type Config = Cfg;
+    type Response = S2::Response;
+    type Error = S2::Error;
+    type Service = S2;
 
-    type InitError = E;
-    type Future = R;
+    type InitError = Err;
+    type Future = Fut;
 
-    fn new_service(&self, cfg: C) -> Self::Future {
+    fn new_service(&self, cfg: Cfg) -> Self::Future {
         let (t, f) = &mut *self.srv.borrow_mut();
         f(cfg, t)
     }
 }
 
 /// Convert `Fn(&Config) -> Future<Service>` fn to NewService
-struct ApplyConfigServiceFactory<F, C, T, R, S>
+struct ApplyConfigServiceFactory<SF, Req, F, Cfg, Fut, S>
 where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
+    SF: ServiceFactory<Req, Config = ()>,
+    F: FnMut(Cfg, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<S, SF::InitError>>,
+    S: Service<Req>,
 {
-    srv: Rc<RefCell<(T, F)>>,
-    _t: PhantomData<(C, R, S)>,
+    srv: Rc<RefCell<(SF, F)>>,
+    _phantom: PhantomData<(Cfg, Req, Fut, S)>,
 }
 
-impl<F, C, T, R, S> Clone for ApplyConfigServiceFactory<F, C, T, R, S>
+impl<SF, Req, F, Cfg, Fut, S> Clone for ApplyConfigServiceFactory<SF, Req, F, Cfg, Fut, S>
 where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
+    SF: ServiceFactory<Req, Config = ()>,
+    F: FnMut(Cfg, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<S, SF::InitError>>,
+    S: Service<Req>,
 {
     fn clone(&self) -> Self {
         Self {
             srv: self.srv.clone(),
-            _t: PhantomData,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<F, C, T, R, S> ServiceFactory for ApplyConfigServiceFactory<F, C, T, R, S>
+impl<SF, Req, F, Cfg, Fut, S> ServiceFactory<Req>
+    for ApplyConfigServiceFactory<SF, Req, F, Cfg, Fut, S>
 where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    T::InitError: From<T::Error>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
+    SF: ServiceFactory<Req, Config = ()>,
+    SF::InitError: From<SF::Error>,
+    F: FnMut(Cfg, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<S, SF::InitError>>,
+    S: Service<Req>,
 {
-    type Config = C;
-    type Request = S::Request;
+    type Config = Cfg;
     type Response = S::Response;
     type Error = S::Error;
     type Service = S;
 
-    type InitError = T::InitError;
-    type Future = ApplyConfigServiceFactoryResponse<F, C, T, R, S>;
+    type InitError = SF::InitError;
+    type Future = ApplyConfigServiceFactoryResponse<SF, Req, F, Cfg, Fut, S>;
 
-    fn new_service(&self, cfg: C) -> Self::Future {
+    fn new_service(&self, cfg: Cfg) -> Self::Future {
         ApplyConfigServiceFactoryResponse {
             cfg: Some(cfg),
             store: self.srv.clone(),
-            state: State::A(self.srv.borrow().0.new_service(())),
+            state: State::A {
+                fut: self.srv.borrow().0.new_service(()),
+            },
         }
     }
 }
 
-#[pin_project::pin_project]
-struct ApplyConfigServiceFactoryResponse<F, C, T, R, S>
-where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    T::InitError: From<T::Error>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
-{
-    cfg: Option<C>,
-    store: Rc<RefCell<(T, F)>>,
-    #[pin]
-    state: State<T, R, S>,
+pin_project! {
+    struct ApplyConfigServiceFactoryResponse<SF, Req, F, Cfg, Fut, S>
+    where
+        SF: ServiceFactory<Req, Config = ()>,
+        SF::InitError: From<SF::Error>,
+        F: FnMut(Cfg, &mut SF::Service) -> Fut,
+        Fut: Future<Output = Result<S, SF::InitError>>,
+        S: Service<Req>,
+    {
+        cfg: Option<Cfg>,
+        store: Rc<RefCell<(SF, F)>>,
+        #[pin]
+        state: State<SF, Fut, S, Req>,
+    }
 }
 
-#[pin_project::pin_project(project = StateProj)]
-enum State<T, R, S>
-where
-    T: ServiceFactory<Config = ()>,
-    T::InitError: From<T::Error>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
-{
-    A(#[pin] T::Future),
-    B(T::Service),
-    C(#[pin] R),
+pin_project! {
+    #[project = StateProj]
+    enum State<SF, Fut, S, Req>
+    where
+        SF: ServiceFactory<Req, Config = ()>,
+        SF::InitError: From<SF::Error>,
+        Fut: Future<Output = Result<S, SF::InitError>>,
+        S: Service<Req>,
+    {
+        A { #[pin] fut: SF::Future },
+        B { svc: SF::Service },
+        C { #[pin] fut: Fut },
+    }
 }
 
-impl<F, C, T, R, S> Future for ApplyConfigServiceFactoryResponse<F, C, T, R, S>
+impl<SF, Req, F, Cfg, Fut, S> Future
+    for ApplyConfigServiceFactoryResponse<SF, Req, F, Cfg, Fut, S>
 where
-    F: FnMut(C, &mut T::Service) -> R,
-    T: ServiceFactory<Config = ()>,
-    T::InitError: From<T::Error>,
-    R: Future<Output = Result<S, T::InitError>>,
-    S: Service,
+    SF: ServiceFactory<Req, Config = ()>,
+    SF::InitError: From<SF::Error>,
+    F: FnMut(Cfg, &mut SF::Service) -> Fut,
+    Fut: Future<Output = Result<S, SF::InitError>>,
+    S: Service<Req>,
 {
-    type Output = Result<S, T::InitError>;
+    type Output = Result<S, SF::InitError>;
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut this = self.as_mut().project();
 
         match this.state.as_mut().project() {
-            StateProj::A(fut) => match fut.poll(cx)? {
+            StateProj::A { fut } => match fut.poll(cx)? {
                 Poll::Pending => Poll::Pending,
-                Poll::Ready(srv) => {
-                    this.state.set(State::B(srv));
+                Poll::Ready(svc) => {
+                    this.state.set(State::B { svc });
                     self.poll(cx)
                 }
             },
-            StateProj::B(srv) => match srv.poll_ready(cx)? {
+            StateProj::B { svc } => match svc.poll_ready(cx)? {
                 Poll::Ready(_) => {
                     {
                         let (_, f) = &mut *this.store.borrow_mut();
-                        let fut = f(this.cfg.take().unwrap(), srv);
-                        this.state.set(State::C(fut));
+                        let fut = f(this.cfg.take().unwrap(), svc);
+                        this.state.set(State::C { fut });
                     }
                     self.poll(cx)
                 }
                 Poll::Pending => Poll::Pending,
             },
-            StateProj::C(fut) => fut.poll(cx),
+            StateProj::C { fut } => fut.poll(cx),
         }
     }
 }

actix-service/src/boxed.rs

@@ -1,145 +1,141 @@
-use std::future::Future;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use futures_util::future::FutureExt;
+use alloc::boxed::Box;
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use crate::{Service, ServiceFactory};
 
-pub type BoxFuture<I, E> = Pin<Box<dyn Future<Output = Result<I, E>>>>;
+pub type BoxFuture<T> = Pin<Box<dyn Future<Output = T>>>;
 
 pub type BoxService<Req, Res, Err> =
-    Box<dyn Service<Request = Req, Response = Res, Error = Err, Future = BoxFuture<Res, Err>>>;
+    Box<dyn Service<Req, Response = Res, Error = Err, Future = BoxFuture<Result<Res, Err>>>>;
 
-pub struct BoxServiceFactory<C, Req, Res, Err, InitErr>(Inner<C, Req, Res, Err, InitErr>);
+pub struct BoxServiceFactory<Cfg, Req, Res, Err, InitErr>(Inner<Cfg, Req, Res, Err, InitErr>);
 
 /// Create boxed service factory
-pub fn factory<T>(
-    factory: T,
-) -> BoxServiceFactory<T::Config, T::Request, T::Response, T::Error, T::InitError>
+pub fn factory<SF, Req>(
+    factory: SF,
+) -> BoxServiceFactory<SF::Config, Req, SF::Response, SF::Error, SF::InitError>
 where
-    T: ServiceFactory + 'static,
-    T::Request: 'static,
-    T::Response: 'static,
-    T::Service: 'static,
-    T::Future: 'static,
-    T::Error: 'static,
-    T::InitError: 'static,
+    SF: ServiceFactory<Req> + 'static,
+    Req: 'static,
+    SF::Response: 'static,
+    SF::Service: 'static,
+    SF::Future: 'static,
+    SF::Error: 'static,
+    SF::InitError: 'static,
 {
     BoxServiceFactory(Box::new(FactoryWrapper {
         factory,
-        _t: std::marker::PhantomData,
+        _t: PhantomData,
     }))
 }
 
 /// Create boxed service
-pub fn service<T>(service: T) -> BoxService<T::Request, T::Response, T::Error>
+pub fn service<S, Req>(service: S) -> BoxService<Req, S::Response, S::Error>
 where
-    T: Service + 'static,
-    T::Future: 'static,
+    S: Service<Req> + 'static,
+    Req: 'static,
+    S::Future: 'static,
 {
-    Box::new(ServiceWrapper(service))
+    Box::new(ServiceWrapper(service, PhantomData))
 }
 
 type Inner<C, Req, Res, Err, InitErr> = Box<
     dyn ServiceFactory<
+        Req,
         Config = C,
-        Request = Req,
         Response = Res,
         Error = Err,
         InitError = InitErr,
         Service = BoxService<Req, Res, Err>,
-        Future = BoxFuture<BoxService<Req, Res, Err>, InitErr>,
+        Future = BoxFuture<Result<BoxService<Req, Res, Err>, InitErr>>,
     >,
 >;
 
-impl<C, Req, Res, Err, InitErr> ServiceFactory for BoxServiceFactory<C, Req, Res, Err, InitErr>
+impl<C, Req, Res, Err, InitErr> ServiceFactory<Req>
+    for BoxServiceFactory<C, Req, Res, Err, InitErr>
 where
     Req: 'static,
     Res: 'static,
     Err: 'static,
     InitErr: 'static,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
     type InitError = InitErr;
     type Config = C;
     type Service = BoxService<Req, Res, Err>;
 
-    type Future = BoxFuture<Self::Service, InitErr>;
+    type Future = BoxFuture<Result<Self::Service, InitErr>>;
 
     fn new_service(&self, cfg: C) -> Self::Future {
         self.0.new_service(cfg)
     }
 }
 
-struct FactoryWrapper<C, T: ServiceFactory> {
-    factory: T,
-    _t: std::marker::PhantomData<C>,
+struct FactoryWrapper<SF, Req, Cfg> {
+    factory: SF,
+    _t: PhantomData<(Req, Cfg)>,
 }
 
-impl<C, T, Req, Res, Err, InitErr> ServiceFactory for FactoryWrapper<C, T>
+impl<SF, Req, Cfg, Res, Err, InitErr> ServiceFactory<Req> for FactoryWrapper<SF, Req, Cfg>
 where
     Req: 'static,
     Res: 'static,
     Err: 'static,
     InitErr: 'static,
-    T: ServiceFactory<
-        Config = C,
-        Request = Req,
-        Response = Res,
-        Error = Err,
-        InitError = InitErr,
-    >,
-    T::Future: 'static,
-    T::Service: 'static,
-    <T::Service as Service>::Future: 'static,
+    SF: ServiceFactory<Req, Config = Cfg, Response = Res, Error = Err, InitError = InitErr>,
+    SF::Future: 'static,
+    SF::Service: 'static,
+    <SF::Service as Service<Req>>::Future: 'static,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
     type InitError = InitErr;
-    type Config = C;
+    type Config = Cfg;
     type Service = BoxService<Req, Res, Err>;
-    type Future = BoxFuture<Self::Service, Self::InitError>;
+    type Future = BoxFuture<Result<Self::Service, Self::InitError>>;
 
-    fn new_service(&self, cfg: C) -> Self::Future {
-        Box::pin(
-            self.factory
-                .new_service(cfg)
-                .map(|res| res.map(ServiceWrapper::boxed)),
-        )
+    fn new_service(&self, cfg: Cfg) -> Self::Future {
+        let fut = self.factory.new_service(cfg);
+        Box::pin(async {
+            let res = fut.await;
+            res.map(ServiceWrapper::boxed)
+        })
     }
 }
 
-struct ServiceWrapper<T: Service>(T);
+struct ServiceWrapper<S: Service<Req>, Req>(S, PhantomData<Req>);
 
-impl<T> ServiceWrapper<T>
+impl<S, Req> ServiceWrapper<S, Req>
 where
-    T: Service + 'static,
-    T::Future: 'static,
+    S: Service<Req> + 'static,
+    Req: 'static,
+    S::Future: 'static,
 {
-    fn boxed(service: T) -> BoxService<T::Request, T::Response, T::Error> {
-        Box::new(ServiceWrapper(service))
+    fn boxed(service: S) -> BoxService<Req, S::Response, S::Error> {
+        Box::new(ServiceWrapper(service, PhantomData))
     }
 }
 
-impl<T, Req, Res, Err> Service for ServiceWrapper<T>
+impl<S, Req, Res, Err> Service<Req> for ServiceWrapper<S, Req>
 where
-    T: Service<Request = Req, Response = Res, Error = Err>,
-    T::Future: 'static,
+    S: Service<Req, Response = Res, Error = Err>,
+    S::Future: 'static,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
-    type Future = BoxFuture<Res, Err>;
+    type Future = BoxFuture<Result<Res, Err>>;
 
     fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.0.poll_ready(ctx)
     }
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         Box::pin(self.0.call(req))
     }
 }

actix-service/src/ext.rs

@@ -0,0 +1,70 @@
+use crate::{dev, Service, ServiceFactory};
+
+pub trait ServiceExt<Req>: Service<Req> {
+    /// Map this service's output to a different type, returning a new service
+    /// of the resulting type.
+    ///
+    /// This function is similar to the `Option::map` or `Iterator::map` where
+    /// it will change the type of the underlying service.
+    ///
+    /// Note that this function consumes the receiving service and returns a
+    /// wrapped version of it, similar to the existing `map` methods in the
+    /// standard library.
+    fn map<F, R>(self, f: F) -> dev::Map<Self, F, Req, R>
+    where
+        Self: Sized,
+        F: FnMut(Self::Response) -> R,
+    {
+        dev::Map::new(self, f)
+    }
+
+    /// Map this service's error to a different error, returning a new service.
+    ///
+    /// This function is similar to the `Result::map_err` where it will change
+    /// the error type of the underlying service. For example, this can be useful to
+    /// ensure that services have the same error type.
+    ///
+    /// Note that this function consumes the receiving service and returns a
+    /// wrapped version of it.
+    fn map_err<F, E>(self, f: F) -> dev::MapErr<Self, Req, F, E>
+    where
+        Self: Sized,
+        F: Fn(Self::Error) -> E,
+    {
+        dev::MapErr::new(self, f)
+    }
+}
+
+impl<S, Req> ServiceExt<Req> for S where S: Service<Req> {}
+
+pub trait ServiceFactoryExt<Req>: ServiceFactory<Req> {
+    /// Map this service's output to a different type, returning a new service
+    /// of the resulting type.
+    fn map<F, R>(self, f: F) -> crate::map::MapServiceFactory<Self, F, Req, R>
+    where
+        Self: Sized,
+        F: FnMut(Self::Response) -> R + Clone,
+    {
+        crate::map::MapServiceFactory::new(self, f)
+    }
+
+    /// Map this service's error to a different error, returning a new service.
+    fn map_err<F, E>(self, f: F) -> crate::map_err::MapErrServiceFactory<Self, Req, F, E>
+    where
+        Self: Sized,
+        F: Fn(Self::Error) -> E + Clone,
+    {
+        crate::map_err::MapErrServiceFactory::new(self, f)
+    }
+
+    /// Map this factory's init error to a different error, returning a new service.
+    fn map_init_err<F, E>(self, f: F) -> crate::map_init_err::MapInitErr<Self, F, Req, E>
+    where
+        Self: Sized,
+        F: Fn(Self::InitError) -> E + Clone,
+    {
+        crate::map_init_err::MapInitErr::new(self, f)
+    }
+}
+
+impl<S, Req> ServiceFactoryExt<Req> for S where S: ServiceFactory<Req> {}

actix-service/src/fn_service.rs

@@ -1,10 +1,6 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::task::{Context, Poll};
+use core::{future::Future, marker::PhantomData, task::Poll};
 
-use futures_util::future::{ok, Ready};
-
-use crate::{IntoService, IntoServiceFactory, Service, ServiceFactory};
+use crate::{ok, IntoService, IntoServiceFactory, Ready, Service, ServiceFactory};
 
 /// Create `ServiceFactory` for function that can act as a `Service`
 pub fn fn_service<F, Fut, Req, Res, Err, Cfg>(
@@ -53,9 +49,11 @@ where
 ///     Ok(())
 /// }
 /// ```
-pub fn fn_factory<F, Cfg, Srv, Fut, Err>(f: F) -> FnServiceNoConfig<F, Cfg, Srv, Fut, Err>
+pub fn fn_factory<F, Cfg, Srv, Req, Fut, Err>(
+    f: F,
+) -> FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>
 where
-    Srv: Service,
+    Srv: Service<Req>,
     F: Fn() -> Fut,
     Fut: Future<Output = Result<Srv, Err>>,
 {
@@ -92,13 +90,13 @@ where
 ///     Ok(())
 /// }
 /// ```
-pub fn fn_factory_with_config<F, Fut, Cfg, Srv, Err>(
+pub fn fn_factory_with_config<F, Fut, Cfg, Srv, Req, Err>(
     f: F,
-) -> FnServiceConfig<F, Fut, Cfg, Srv, Err>
+) -> FnServiceConfig<F, Fut, Cfg, Srv, Req, Err>
 where
     F: Fn(Cfg) -> Fut,
     Fut: Future<Output = Result<Srv, Err>>,
-    Srv: Service,
+    Srv: Service<Req>,
 {
     FnServiceConfig::new(f)
 }
@@ -132,26 +130,23 @@ where
     }
 }
 
-impl<F, Fut, Req, Res, Err> Service for FnService<F, Fut, Req, Res, Err>
+impl<F, Fut, Req, Res, Err> Service<Req> for FnService<F, Fut, Req, Res, Err>
 where
     F: FnMut(Req) -> Fut,
     Fut: Future<Output = Result<Res, Err>>,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
     type Future = Fut;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    crate::always_ready!();
 
     fn call(&mut self, req: Req) -> Self::Future {
         (self.f)(req)
     }
 }
 
-impl<F, Fut, Req, Res, Err> IntoService<FnService<F, Fut, Req, Res, Err>> for F
+impl<F, Fut, Req, Res, Err> IntoService<FnService<F, Fut, Req, Res, Err>, Req> for F
 where
     F: FnMut(Req) -> Fut,
     Fut: Future<Output = Result<Res, Err>>,
@@ -190,31 +185,28 @@ where
     }
 }
 
-impl<F, Fut, Req, Res, Err> Service for FnServiceFactory<F, Fut, Req, Res, Err, ()>
+impl<F, Fut, Req, Res, Err> Service<Req> for FnServiceFactory<F, Fut, Req, Res, Err, ()>
 where
     F: FnMut(Req) -> Fut + Clone,
     Fut: Future<Output = Result<Res, Err>>,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
     type Future = Fut;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    crate::always_ready!();
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         (self.f)(req)
     }
 }
 
-impl<F, Fut, Req, Res, Err, Cfg> ServiceFactory for FnServiceFactory<F, Fut, Req, Res, Err, Cfg>
+impl<F, Fut, Req, Res, Err, Cfg> ServiceFactory<Req>
+    for FnServiceFactory<F, Fut, Req, Res, Err, Cfg>
 where
     F: FnMut(Req) -> Fut + Clone,
     Fut: Future<Output = Result<Res, Err>>,
 {
-    type Request = Req;
     type Response = Res;
     type Error = Err;
 
@@ -229,7 +221,7 @@ where
 }
 
 impl<F, Fut, Req, Res, Err, Cfg>
-    IntoServiceFactory<FnServiceFactory<F, Fut, Req, Res, Err, Cfg>> for F
+    IntoServiceFactory<FnServiceFactory<F, Fut, Req, Res, Err, Cfg>, Req> for F
 where
     F: Fn(Req) -> Fut + Clone,
     Fut: Future<Output = Result<Res, Err>>,
@@ -240,32 +232,32 @@ where
 }
 
 /// Convert `Fn(&Config) -> Future<Service>` fn to NewService
-pub struct FnServiceConfig<F, Fut, Cfg, Srv, Err>
+pub struct FnServiceConfig<F, Fut, Cfg, Srv, Req, Err>
 where
     F: Fn(Cfg) -> Fut,
     Fut: Future<Output = Result<Srv, Err>>,
-    Srv: Service,
+    Srv: Service<Req>,
 {
     f: F,
-    _t: PhantomData<(Fut, Cfg, Srv, Err)>,
+    _t: PhantomData<(Fut, Cfg, Req, Srv, Err)>,
 }
 
-impl<F, Fut, Cfg, Srv, Err> FnServiceConfig<F, Fut, Cfg, Srv, Err>
+impl<F, Fut, Cfg, Srv, Req, Err> FnServiceConfig<F, Fut, Cfg, Srv, Req, Err>
 where
     F: Fn(Cfg) -> Fut,
     Fut: Future<Output = Result<Srv, Err>>,
-    Srv: Service,
+    Srv: Service<Req>,
 {
     fn new(f: F) -> Self {
         FnServiceConfig { f, _t: PhantomData }
     }
 }
 
-impl<F, Fut, Cfg, Srv, Err> Clone for FnServiceConfig<F, Fut, Cfg, Srv, Err>
+impl<F, Fut, Cfg, Srv, Req, Err> Clone for FnServiceConfig<F, Fut, Cfg, Srv, Req, Err>
 where
     F: Fn(Cfg) -> Fut + Clone,
     Fut: Future<Output = Result<Srv, Err>>,
-    Srv: Service,
+    Srv: Service<Req>,
 {
     fn clone(&self) -> Self {
         FnServiceConfig {
@@ -275,13 +267,13 @@ where
     }
 }
 
-impl<F, Fut, Cfg, Srv, Err> ServiceFactory for FnServiceConfig<F, Fut, Cfg, Srv, Err>
+impl<F, Fut, Cfg, Srv, Req, Err> ServiceFactory<Req>
+    for FnServiceConfig<F, Fut, Cfg, Srv, Req, Err>
 where
     F: Fn(Cfg) -> Fut,
     Fut: Future<Output = Result<Srv, Err>>,
-    Srv: Service,
+    Srv: Service<Req>,
 {
-    type Request = Srv::Request;
     type Response = Srv::Response;
     type Error = Srv::Error;
 
@@ -296,76 +288,77 @@ where
 }
 
 /// Converter for `Fn() -> Future<Service>` fn
-pub struct FnServiceNoConfig<F, C, S, R, E>
+pub struct FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>
 where
-    F: Fn() -> R,
-    S: Service,
-    R: Future<Output = Result<S, E>>,
+    F: Fn() -> Fut,
+    Srv: Service<Req>,
+    Fut: Future<Output = Result<Srv, Err>>,
 {
     f: F,
-    _t: PhantomData<C>,
+    _t: PhantomData<(Cfg, Req)>,
 }
 
-impl<F, C, S, R, E> FnServiceNoConfig<F, C, S, R, E>
+impl<F, Cfg, Srv, Req, Fut, Err> FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>
 where
-    F: Fn() -> R,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    F: Fn() -> Fut,
+    Fut: Future<Output = Result<Srv, Err>>,
+    Srv: Service<Req>,
 {
     fn new(f: F) -> Self {
         Self { f, _t: PhantomData }
     }
 }
 
-impl<F, C, S, R, E> ServiceFactory for FnServiceNoConfig<F, C, S, R, E>
+impl<F, Cfg, Srv, Req, Fut, Err> ServiceFactory<Req>
+    for FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>
 where
-    F: Fn() -> R,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    F: Fn() -> Fut,
+    Fut: Future<Output = Result<Srv, Err>>,
+    Srv: Service<Req>,
 {
-    type Request = S::Request;
-    type Response = S::Response;
-    type Error = S::Error;
-    type Service = S;
-    type Config = C;
-    type InitError = E;
-    type Future = R;
+    type Response = Srv::Response;
+    type Error = Srv::Error;
+    type Service = Srv;
+    type Config = Cfg;
+    type InitError = Err;
+    type Future = Fut;
 
-    fn new_service(&self, _: C) -> Self::Future {
+    fn new_service(&self, _: Cfg) -> Self::Future {
         (self.f)()
     }
 }
 
-impl<F, C, S, R, E> Clone for FnServiceNoConfig<F, C, S, R, E>
+impl<F, Cfg, Srv, Req, Fut, Err> Clone for FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>
 where
-    F: Fn() -> R + Clone,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    F: Fn() -> Fut + Clone,
+    Fut: Future<Output = Result<Srv, Err>>,
+    Srv: Service<Req>,
 {
     fn clone(&self) -> Self {
         Self::new(self.f.clone())
     }
 }
 
-impl<F, C, S, R, E> IntoServiceFactory<FnServiceNoConfig<F, C, S, R, E>> for F
+impl<F, Cfg, Srv, Req, Fut, Err>
+    IntoServiceFactory<FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err>, Req> for F
 where
-    F: Fn() -> R,
-    R: Future<Output = Result<S, E>>,
-    S: Service,
+    F: Fn() -> Fut,
+    Fut: Future<Output = Result<Srv, Err>>,
+    Srv: Service<Req>,
 {
-    fn into_factory(self) -> FnServiceNoConfig<F, C, S, R, E> {
+    fn into_factory(self) -> FnServiceNoConfig<F, Cfg, Srv, Req, Fut, Err> {
         FnServiceNoConfig::new(self)
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use std::task::Poll;
+    use core::task::Poll;
 
-    use futures_util::future::{lazy, ok};
+    use futures_util::future::lazy;
 
     use super::*;
-    use crate::{Service, ServiceFactory};
+    use crate::{ok, Service, ServiceFactory};
 
     #[actix_rt::test]
     async fn test_fn_service() {

actix-service/src/lib.rs

@@ -1,36 +1,47 @@
-//! See [`Service`](trait.Service.html) docs for information on this crate's foundational trait.
+//! See [`Service`] docs for information on this crate's foundational trait.
 
-#![deny(rust_2018_idioms, warnings)]
+#![no_std]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
-use std::cell::RefCell;
-use std::future::Future;
-use std::rc::Rc;
-use std::sync::Arc;
-use std::task::{self, Context, Poll};
+extern crate alloc;
+
+use alloc::{boxed::Box, rc::Rc, sync::Arc};
+use core::{
+    cell::RefCell,
+    future::Future,
+    task::{self, Context, Poll},
+};
 
 mod and_then;
-mod and_then_apply_fn;
 mod apply;
 mod apply_cfg;
 pub mod boxed;
+mod ext;
 mod fn_service;
 mod map;
 mod map_config;
 mod map_err;
 mod map_init_err;
 mod pipeline;
+mod ready;
 mod then;
 mod transform;
 mod transform_err;
 
 pub use self::apply::{apply_fn, apply_fn_factory};
 pub use self::apply_cfg::{apply_cfg, apply_cfg_factory};
+pub use self::ext::{ServiceExt, ServiceFactoryExt};
 pub use self::fn_service::{fn_factory, fn_factory_with_config, fn_service};
 pub use self::map_config::{map_config, unit_config};
 pub use self::pipeline::{pipeline, pipeline_factory, Pipeline, PipelineFactory};
 pub use self::transform::{apply, Transform};
 
+#[allow(unused_imports)]
+use self::ready::{err, ok, ready, Ready};
+
 /// An asynchronous operation from `Request` to a `Response`.
 ///
 /// The `Service` trait models a request/response interaction, receiving requests and returning
@@ -65,19 +76,16 @@ pub use self::transform::{apply, Transform};
 /// ```
 ///
 /// Sometimes it is not necessary to implement the Service trait. For example, the above service
-/// could be rewritten as a simple function and passed to [fn_service](fn.fn_service.html).
+/// could be rewritten as a simple function and passed to [fn_service](fn_service()).
 ///
 /// ```rust,ignore
 /// async fn my_service(req: u8) -> Result<u64, MyError>;
 /// ```
-pub trait Service {
-    /// Requests handled by the service.
-    type Request;
-
+pub trait Service<Req> {
     /// Responses given by the service.
     type Response;
 
-    /// Errors produced by the service.
+    /// Errors produced by the service when polling readiness or executing call.
     type Error;
 
     /// The future response value.
@@ -107,40 +115,7 @@ pub trait Service {
     ///
     /// Calling `call` without calling `poll_ready` is permitted. The
     /// implementation must be resilient to this fact.
-    fn call(&mut self, req: Self::Request) -> Self::Future;
-
-    /// Map this service's output to a different type, returning a new service
-    /// of the resulting type.
-    ///
-    /// This function is similar to the `Option::map` or `Iterator::map` where
-    /// it will change the type of the underlying service.
-    ///
-    /// Note that this function consumes the receiving service and returns a
-    /// wrapped version of it, similar to the existing `map` methods in the
-    /// standard library.
-    fn map<F, R>(self, f: F) -> crate::dev::Map<Self, F, R>
-    where
-        Self: Sized,
-        F: FnMut(Self::Response) -> R,
-    {
-        crate::dev::Map::new(self, f)
-    }
-
-    /// Map this service's error to a different error, returning a new service.
-    ///
-    /// This function is similar to the `Result::map_err` where it will change
-    /// the error type of the underlying service. For example, this can be useful to
-    /// ensure that services have the same error type.
-    ///
-    /// Note that this function consumes the receiving service and returns a
-    /// wrapped version of it.
-    fn map_err<F, E>(self, f: F) -> crate::dev::MapErr<Self, F, E>
-    where
-        Self: Sized,
-        F: Fn(Self::Error) -> E,
-    {
-        crate::dev::MapErr::new(self, f)
-    }
+    fn call(&mut self, req: Req) -> Self::Future;
 }
 
 /// Factory for creating `Service`s.
@@ -152,10 +127,7 @@ pub trait Service {
 /// requests on that new TCP stream.
 ///
 /// `Config` is a service factory configuration type.
-pub trait ServiceFactory {
-    /// Requests handled by the created services.
-    type Request;
-
+pub trait ServiceFactory<Req> {
     /// Responses given by the created services.
     type Response;
 
@@ -166,11 +138,7 @@ pub trait ServiceFactory {
     type Config;
 
     /// The kind of `Service` created by this factory.
-    type Service: Service<
-        Request = Self::Request,
-        Response = Self::Response,
-        Error = Self::Error,
-    >;
+    type Service: Service<Req, Response = Self::Response, Error = Self::Error>;
 
     /// Errors potentially raised while building a service.
     type InitError;
@@ -180,41 +148,12 @@ pub trait ServiceFactory {
 
     /// Create and return a new service asynchronously.
     fn new_service(&self, cfg: Self::Config) -> Self::Future;
-
-    /// Map this service's output to a different type, returning a new service
-    /// of the resulting type.
-    fn map<F, R>(self, f: F) -> crate::map::MapServiceFactory<Self, F, R>
-    where
-        Self: Sized,
-        F: FnMut(Self::Response) -> R + Clone,
-    {
-        crate::map::MapServiceFactory::new(self, f)
-    }
-
-    /// Map this service's error to a different error, returning a new service.
-    fn map_err<F, E>(self, f: F) -> crate::map_err::MapErrServiceFactory<Self, F, E>
-    where
-        Self: Sized,
-        F: Fn(Self::Error) -> E + Clone,
-    {
-        crate::map_err::MapErrServiceFactory::new(self, f)
-    }
-
-    /// Map this factory's init error to a different error, returning a new service.
-    fn map_init_err<F, E>(self, f: F) -> crate::map_init_err::MapInitErr<Self, F, E>
-    where
-        Self: Sized,
-        F: Fn(Self::InitError) -> E + Clone,
-    {
-        crate::map_init_err::MapInitErr::new(self, f)
-    }
 }
 
-impl<'a, S> Service for &'a mut S
+impl<'a, S, Req> Service<Req> for &'a mut S
 where
-    S: Service + 'a,
+    S: Service<Req> + 'a,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Future = S::Future;
@@ -223,16 +162,15 @@ where
         (**self).poll_ready(ctx)
     }
 
-    fn call(&mut self, request: Self::Request) -> S::Future {
+    fn call(&mut self, request: Req) -> S::Future {
         (**self).call(request)
     }
 }
 
-impl<S> Service for Box<S>
+impl<S, Req> Service<Req> for Box<S>
 where
-    S: Service + ?Sized,
+    S: Service<Req> + ?Sized,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Future = S::Future;
@@ -241,16 +179,15 @@ where
         (**self).poll_ready(ctx)
     }
 
-    fn call(&mut self, request: Self::Request) -> S::Future {
+    fn call(&mut self, request: Req) -> S::Future {
         (**self).call(request)
     }
 }
 
-impl<S> Service for RefCell<S>
+impl<S, Req> Service<Req> for RefCell<S>
 where
-    S: Service,
+    S: Service<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Future = S::Future;
@@ -259,16 +196,15 @@ where
         self.borrow_mut().poll_ready(ctx)
     }
 
-    fn call(&mut self, request: Self::Request) -> S::Future {
+    fn call(&mut self, request: Req) -> S::Future {
         self.borrow_mut().call(request)
     }
 }
 
-impl<S> Service for Rc<RefCell<S>>
+impl<S, Req> Service<Req> for Rc<RefCell<S>>
 where
-    S: Service,
+    S: Service<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Future = S::Future;
@@ -277,16 +213,15 @@ where
         self.borrow_mut().poll_ready(ctx)
     }
 
-    fn call(&mut self, request: Self::Request) -> S::Future {
+    fn call(&mut self, request: Req) -> S::Future {
         (&mut (**self).borrow_mut()).call(request)
     }
 }
 
-impl<S> ServiceFactory for Rc<S>
+impl<S, Req> ServiceFactory<Req> for Rc<S>
 where
-    S: ServiceFactory,
+    S: ServiceFactory<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Config = S::Config;
@@ -299,11 +234,10 @@ where
     }
 }
 
-impl<S> ServiceFactory for Arc<S>
+impl<S, Req> ServiceFactory<Req> for Arc<S>
 where
-    S: ServiceFactory,
+    S: ServiceFactory<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Config = S::Config;
@@ -317,52 +251,52 @@ where
 }
 
 /// Trait for types that can be converted to a `Service`
-pub trait IntoService<T>
+pub trait IntoService<S, Req>
 where
-    T: Service,
+    S: Service<Req>,
 {
     /// Convert to a `Service`
-    fn into_service(self) -> T;
+    fn into_service(self) -> S;
 }
 
 /// Trait for types that can be converted to a `ServiceFactory`
-pub trait IntoServiceFactory<T>
+pub trait IntoServiceFactory<SF, Req>
 where
-    T: ServiceFactory,
+    SF: ServiceFactory<Req>,
 {
     /// Convert `Self` to a `ServiceFactory`
-    fn into_factory(self) -> T;
+    fn into_factory(self) -> SF;
 }
 
-impl<T> IntoService<T> for T
+impl<S, Req> IntoService<S, Req> for S
 where
-    T: Service,
+    S: Service<Req>,
 {
-    fn into_service(self) -> T {
+    fn into_service(self) -> S {
         self
     }
 }
 
-impl<T> IntoServiceFactory<T> for T
+impl<SF, Req> IntoServiceFactory<SF, Req> for SF
 where
-    T: ServiceFactory,
+    SF: ServiceFactory<Req>,
 {
-    fn into_factory(self) -> T {
+    fn into_factory(self) -> SF {
         self
     }
 }
 
-/// Convert object of type `T` to a service `S`
-pub fn into_service<T, S>(tp: T) -> S
+/// Convert object of type `U` to a service `S`
+pub fn into_service<I, S, Req>(tp: I) -> S
 where
-    S: Service,
-    T: IntoService<S>,
+    I: IntoService<S, Req>,
+    S: Service<Req>,
 {
     tp.into_service()
 }
 
 pub mod dev {
-    pub use crate::apply::{Apply, ApplyServiceFactory};
+    pub use crate::apply::{Apply, ApplyFactory};
     pub use crate::fn_service::{
         FnService, FnServiceConfig, FnServiceFactory, FnServiceNoConfig,
     };
@@ -373,3 +307,27 @@ pub mod dev {
     pub use crate::transform::ApplyTransform;
     pub use crate::transform_err::TransformMapInitErr;
 }
+
+#[macro_export]
+macro_rules! always_ready {
+    () => {
+        fn poll_ready(
+            &mut self,
+            _: &mut ::core::task::Context<'_>,
+        ) -> ::core::task::Poll<Result<(), Self::Error>> {
+            Poll::Ready(Ok(()))
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! forward_ready {
+    ($field:ident) => {
+        fn poll_ready(
+            &mut self,
+            cx: &mut ::core::task::Context<'_>,
+        ) -> ::core::task::Poll<Result<(), Self::Error>> {
+            self.$field.poll_ready(cx)
+        }
+    };
+}

actix-service/src/map.rs

@@ -1,25 +1,29 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::{Service, ServiceFactory};
 
 /// Service for the `map` combinator, changing the type of a service's response.
 ///
 /// This is created by the `ServiceExt::map` method.
-pub struct Map<A, F, Response> {
+pub struct Map<A, F, Req, Res> {
     service: A,
     f: F,
-    _t: PhantomData<Response>,
+    _t: PhantomData<(Req, Res)>,
 }
 
-impl<A, F, Response> Map<A, F, Response> {
+impl<A, F, Req, Res> Map<A, F, Req, Res> {
     /// Create new `Map` combinator
     pub(crate) fn new(service: A, f: F) -> Self
     where
-        A: Service,
-        F: FnMut(A::Response) -> Response,
+        A: Service<Req>,
+        F: FnMut(A::Response) -> Res,
     {
         Self {
             service,
@@ -29,7 +33,7 @@ impl<A, F, Response> Map<A, F, Response> {
     }
 }
 
-impl<A, F, Response> Clone for Map<A, F, Response>
+impl<A, F, Req, Res> Clone for Map<A, F, Req, Res>
 where
     A: Clone,
     F: Clone,
@@ -43,52 +47,50 @@ where
     }
 }
 
-impl<A, F, Response> Service for Map<A, F, Response>
+impl<A, F, Req, Res> Service<Req> for Map<A, F, Req, Res>
 where
-    A: Service,
-    F: FnMut(A::Response) -> Response + Clone,
+    A: Service<Req>,
+    F: FnMut(A::Response) -> Res + Clone,
 {
-    type Request = A::Request;
-    type Response = Response;
+    type Response = Res;
     type Error = A::Error;
-    type Future = MapFuture<A, F, Response>;
+    type Future = MapFuture<A, F, Req, Res>;
 
-    fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.service.poll_ready(ctx)
-    }
+    crate::forward_ready!(service);
 
-    fn call(&mut self, req: A::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         MapFuture::new(self.service.call(req), self.f.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct MapFuture<A, F, Response>
-where
-    A: Service,
-    F: FnMut(A::Response) -> Response,
-{
-    f: F,
-    #[pin]
-    fut: A::Future,
+pin_project! {
+    pub struct MapFuture<A, F, Req, Res>
+    where
+        A: Service<Req>,
+        F: FnMut(A::Response) -> Res,
+    {
+        f: F,
+        #[pin]
+        fut: A::Future,
+    }
 }
 
-impl<A, F, Response> MapFuture<A, F, Response>
+impl<A, F, Req, Res> MapFuture<A, F, Req, Res>
 where
-    A: Service,
-    F: FnMut(A::Response) -> Response,
+    A: Service<Req>,
+    F: FnMut(A::Response) -> Res,
 {
     fn new(fut: A::Future, f: F) -> Self {
         MapFuture { f, fut }
     }
 }
 
-impl<A, F, Response> Future for MapFuture<A, F, Response>
+impl<A, F, Req, Res> Future for MapFuture<A, F, Req, Res>
 where
-    A: Service,
-    F: FnMut(A::Response) -> Response,
+    A: Service<Req>,
+    F: FnMut(A::Response) -> Res,
 {
-    type Output = Result<Response, A::Error>;
+    type Output = Result<Res, A::Error>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
@@ -102,17 +104,17 @@ where
 }
 
 /// `MapNewService` new service combinator
-pub struct MapServiceFactory<A, F, Res> {
+pub struct MapServiceFactory<A, F, Req, Res> {
     a: A,
     f: F,
-    r: PhantomData<Res>,
+    r: PhantomData<(Res, Req)>,
 }
 
-impl<A, F, Res> MapServiceFactory<A, F, Res> {
+impl<A, F, Req, Res> MapServiceFactory<A, F, Req, Res> {
     /// Create new `Map` new service instance
     pub(crate) fn new(a: A, f: F) -> Self
     where
-        A: ServiceFactory,
+        A: ServiceFactory<Req>,
         F: FnMut(A::Response) -> Res,
     {
         Self {
@@ -123,7 +125,7 @@ impl<A, F, Res> MapServiceFactory<A, F, Res> {
     }
 }
 
-impl<A, F, Res> Clone for MapServiceFactory<A, F, Res>
+impl<A, F, Req, Res> Clone for MapServiceFactory<A, F, Req, Res>
 where
     A: Clone,
     F: Clone,
@@ -137,39 +139,39 @@ where
     }
 }
 
-impl<A, F, Res> ServiceFactory for MapServiceFactory<A, F, Res>
+impl<A, F, Req, Res> ServiceFactory<Req> for MapServiceFactory<A, F, Req, Res>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: FnMut(A::Response) -> Res + Clone,
 {
-    type Request = A::Request;
     type Response = Res;
     type Error = A::Error;
 
     type Config = A::Config;
-    type Service = Map<A::Service, F, Res>;
+    type Service = Map<A::Service, F, Req, Res>;
     type InitError = A::InitError;
-    type Future = MapServiceFuture<A, F, Res>;
+    type Future = MapServiceFuture<A, F, Req, Res>;
 
     fn new_service(&self, cfg: A::Config) -> Self::Future {
         MapServiceFuture::new(self.a.new_service(cfg), self.f.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct MapServiceFuture<A, F, Res>
-where
-    A: ServiceFactory,
-    F: FnMut(A::Response) -> Res,
-{
-    #[pin]
-    fut: A::Future,
-    f: Option<F>,
+pin_project! {
+    pub struct MapServiceFuture<A, F, Req, Res>
+    where
+        A: ServiceFactory<Req>,
+        F: FnMut(A::Response) -> Res,
+    {
+        #[pin]
+        fut: A::Future,
+        f: Option<F>,
+    }
 }
 
-impl<A, F, Res> MapServiceFuture<A, F, Res>
+impl<A, F, Req, Res> MapServiceFuture<A, F, Req, Res>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: FnMut(A::Response) -> Res,
 {
     fn new(fut: A::Future, f: F) -> Self {
@@ -177,12 +179,12 @@ where
     }
 }
 
-impl<A, F, Res> Future for MapServiceFuture<A, F, Res>
+impl<A, F, Req, Res> Future for MapServiceFuture<A, F, Req, Res>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: FnMut(A::Response) -> Res,
 {
-    type Output = Result<Map<A::Service, F, Res>, A::InitError>;
+    type Output = Result<Map<A::Service, F, Req, Res>, A::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
@@ -197,22 +199,21 @@ where
 
 #[cfg(test)]
 mod tests {
-    use futures_util::future::{lazy, ok, Ready};
+    use futures_util::future::lazy;
 
     use super::*;
-    use crate::{IntoServiceFactory, Service, ServiceFactory};
+    use crate::{
+        ok, IntoServiceFactory, Ready, Service, ServiceExt, ServiceFactory, ServiceFactoryExt,
+    };
 
     struct Srv;
 
-    impl Service for Srv {
-        type Request = ();
+    impl Service<()> for Srv {
         type Response = ();
         type Error = ();
         type Future = Ready<Result<(), ()>>;
 
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
+        crate::always_ready!();
 
         fn call(&mut self, _: ()) -> Self::Future {
             ok(())

actix-service/src/map_config.rs

@@ -1,4 +1,4 @@
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 use super::{IntoServiceFactory, ServiceFactory};
 
@@ -6,121 +6,123 @@ use super::{IntoServiceFactory, ServiceFactory};
 ///
 /// Note that this function consumes the receiving service factory and returns
 /// a wrapped version of it.
-pub fn map_config<T, U, F, C>(factory: U, f: F) -> MapConfig<T, F, C>
+pub fn map_config<I, SF, S, Req, F, Cfg>(factory: I, f: F) -> MapConfig<SF, Req, F, Cfg>
 where
-    T: ServiceFactory,
-    U: IntoServiceFactory<T>,
-    F: Fn(C) -> T::Config,
+    I: IntoServiceFactory<SF, Req>,
+    SF: ServiceFactory<Req>,
+    F: Fn(Cfg) -> SF::Config,
 {
     MapConfig::new(factory.into_factory(), f)
 }
 
-/// Replace config with unit
-pub fn unit_config<T, U, C>(factory: U) -> UnitConfig<T, C>
+/// Replace config with unit.
+pub fn unit_config<I, SF, Cfg, Req>(factory: I) -> UnitConfig<SF, Cfg, Req>
 where
-    T: ServiceFactory<Config = ()>,
-    U: IntoServiceFactory<T>,
+    I: IntoServiceFactory<SF, Req>,
+    SF: ServiceFactory<Req, Config = ()>,
 {
     UnitConfig::new(factory.into_factory())
 }
 
 /// `map_config()` adapter service factory
-pub struct MapConfig<A, F, C> {
-    a: A,
-    f: F,
-    e: PhantomData<C>,
+pub struct MapConfig<SF, Req, F, Cfg> {
+    factory: SF,
+    cfg_mapper: F,
+    e: PhantomData<(Cfg, Req)>,
 }
 
-impl<A, F, C> MapConfig<A, F, C> {
+impl<SF, Req, F, Cfg> MapConfig<SF, Req, F, Cfg> {
     /// Create new `MapConfig` combinator
-    pub(crate) fn new(a: A, f: F) -> Self
+    pub(crate) fn new(factory: SF, cfg_mapper: F) -> Self
     where
-        A: ServiceFactory,
-        F: Fn(C) -> A::Config,
+        SF: ServiceFactory<Req>,
+        F: Fn(Cfg) -> SF::Config,
     {
         Self {
-            a,
-            f,
+            factory,
+            cfg_mapper,
             e: PhantomData,
         }
     }
 }
 
-impl<A, F, C> Clone for MapConfig<A, F, C>
+impl<SF, Req, F, Cfg> Clone for MapConfig<SF, Req, F, Cfg>
 where
-    A: Clone,
+    SF: Clone,
     F: Clone,
 {
     fn clone(&self) -> Self {
         Self {
-            a: self.a.clone(),
-            f: self.f.clone(),
+            factory: self.factory.clone(),
+            cfg_mapper: self.cfg_mapper.clone(),
             e: PhantomData,
         }
     }
 }
 
-impl<A, F, C> ServiceFactory for MapConfig<A, F, C>
+impl<SF, Req, F, Cfg> ServiceFactory<Req> for MapConfig<SF, Req, F, Cfg>
 where
-    A: ServiceFactory,
-    F: Fn(C) -> A::Config,
+    SF: ServiceFactory<Req>,
+    F: Fn(Cfg) -> SF::Config,
 {
-    type Request = A::Request;
-    type Response = A::Response;
-    type Error = A::Error;
+    type Response = SF::Response;
+    type Error = SF::Error;
 
-    type Config = C;
-    type Service = A::Service;
-    type InitError = A::InitError;
-    type Future = A::Future;
+    type Config = Cfg;
+    type Service = SF::Service;
+    type InitError = SF::InitError;
+    type Future = SF::Future;
 
-    fn new_service(&self, cfg: C) -> Self::Future {
-        self.a.new_service((self.f)(cfg))
+    fn new_service(&self, cfg: Self::Config) -> Self::Future {
+        let mapped_cfg = (self.cfg_mapper)(cfg);
+        self.factory.new_service(mapped_cfg)
     }
 }
 
 /// `unit_config()` config combinator
-pub struct UnitConfig<A, C> {
-    a: A,
-    e: PhantomData<C>,
+pub struct UnitConfig<SF, Cfg, Req> {
+    factory: SF,
+    _phantom: PhantomData<(Cfg, Req)>,
 }
 
-impl<A, C> UnitConfig<A, C>
+impl<SF, Cfg, Req> UnitConfig<SF, Cfg, Req>
 where
-    A: ServiceFactory<Config = ()>,
+    SF: ServiceFactory<Req, Config = ()>,
 {
     /// Create new `UnitConfig` combinator
-    pub(crate) fn new(a: A) -> Self {
-        Self { a, e: PhantomData }
-    }
-}
-
-impl<A, C> Clone for UnitConfig<A, C>
-where
-    A: Clone,
-{
-    fn clone(&self) -> Self {
+    pub(crate) fn new(factory: SF) -> Self {
         Self {
-            a: self.a.clone(),
-            e: PhantomData,
+            factory,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<A, C> ServiceFactory for UnitConfig<A, C>
+impl<SF, Cfg, Req> Clone for UnitConfig<SF, Cfg, Req>
 where
-    A: ServiceFactory<Config = ()>,
+    SF: Clone,
 {
-    type Request = A::Request;
-    type Response = A::Response;
-    type Error = A::Error;
-
-    type Config = C;
-    type Service = A::Service;
-    type InitError = A::InitError;
-    type Future = A::Future;
-
-    fn new_service(&self, _: C) -> Self::Future {
-        self.a.new_service(())
+    fn clone(&self) -> Self {
+        Self {
+            factory: self.factory.clone(),
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<SF, Cfg, Req> ServiceFactory<Req> for UnitConfig<SF, Cfg, Req>
+where
+    SF: ServiceFactory<Req, Config = ()>,
+{
+    type Response = SF::Response;
+    type Error = SF::Error;
+
+    type Config = Cfg;
+    type Service = SF::Service;
+    type InitError = SF::InitError;
+    type Future = SF::Future;
+
+    fn new_service(&self, _: Cfg) -> Self::Future {
+        self.factory.new_service(())
     }
 }

actix-service/src/map_err.rs

@@ -1,7 +1,11 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::{Service, ServiceFactory};
 
@@ -9,18 +13,18 @@ use super::{Service, ServiceFactory};
 /// error.
 ///
 /// This is created by the `ServiceExt::map_err` method.
-pub struct MapErr<A, F, E> {
-    service: A,
+pub struct MapErr<S, Req, F, E> {
+    service: S,
     f: F,
-    _t: PhantomData<E>,
+    _t: PhantomData<(E, Req)>,
 }
 
-impl<A, F, E> MapErr<A, F, E> {
+impl<S, Req, F, E> MapErr<S, Req, F, E> {
     /// Create new `MapErr` combinator
-    pub(crate) fn new(service: A, f: F) -> Self
+    pub(crate) fn new(service: S, f: F) -> Self
     where
-        A: Service,
-        F: Fn(A::Error) -> E,
+        S: Service<Req>,
+        F: Fn(S::Error) -> E,
     {
         Self {
             service,
@@ -30,9 +34,9 @@ impl<A, F, E> MapErr<A, F, E> {
     }
 }
 
-impl<A, F, E> Clone for MapErr<A, F, E>
+impl<S, Req, F, E> Clone for MapErr<S, Req, F, E>
 where
-    A: Clone,
+    S: Clone,
     F: Clone,
 {
     fn clone(&self) -> Self {
@@ -44,39 +48,39 @@ where
     }
 }
 
-impl<A, F, E> Service for MapErr<A, F, E>
+impl<A, Req, F, E> Service<Req> for MapErr<A, Req, F, E>
 where
-    A: Service,
+    A: Service<Req>,
     F: Fn(A::Error) -> E + Clone,
 {
-    type Request = A::Request;
     type Response = A::Response;
     type Error = E;
-    type Future = MapErrFuture<A, F, E>;
+    type Future = MapErrFuture<A, Req, F, E>;
 
     fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(ctx).map_err(&self.f)
     }
 
-    fn call(&mut self, req: A::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         MapErrFuture::new(self.service.call(req), self.f.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct MapErrFuture<A, F, E>
-where
-    A: Service,
-    F: Fn(A::Error) -> E,
-{
-    f: F,
-    #[pin]
-    fut: A::Future,
+pin_project! {
+    pub struct MapErrFuture<A, Req, F, E>
+    where
+        A: Service<Req>,
+        F: Fn(A::Error) -> E,
+    {
+        f: F,
+        #[pin]
+        fut: A::Future,
+    }
 }
 
-impl<A, F, E> MapErrFuture<A, F, E>
+impl<A, Req, F, E> MapErrFuture<A, Req, F, E>
 where
-    A: Service,
+    A: Service<Req>,
     F: Fn(A::Error) -> E,
 {
     fn new(fut: A::Future, f: F) -> Self {
@@ -84,9 +88,9 @@ where
     }
 }
 
-impl<A, F, E> Future for MapErrFuture<A, F, E>
+impl<A, Req, F, E> Future for MapErrFuture<A, Req, F, E>
 where
-    A: Service,
+    A: Service<Req>,
     F: Fn(A::Error) -> E,
 {
     type Output = Result<A::Response, E>;
@@ -101,19 +105,19 @@ where
 /// service's error.
 ///
 /// This is created by the `NewServiceExt::map_err` method.
-pub struct MapErrServiceFactory<A, F, E>
+pub struct MapErrServiceFactory<A, Req, F, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::Error) -> E + Clone,
 {
     a: A,
     f: F,
-    e: PhantomData<E>,
+    e: PhantomData<(E, Req)>,
 }
 
-impl<A, F, E> MapErrServiceFactory<A, F, E>
+impl<A, Req, F, E> MapErrServiceFactory<A, Req, F, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::Error) -> E + Clone,
 {
     /// Create new `MapErr` new service instance
@@ -126,9 +130,9 @@ where
     }
 }
 
-impl<A, F, E> Clone for MapErrServiceFactory<A, F, E>
+impl<A, Req, F, E> Clone for MapErrServiceFactory<A, Req, F, E>
 where
-    A: ServiceFactory + Clone,
+    A: ServiceFactory<Req> + Clone,
     F: Fn(A::Error) -> E + Clone,
 {
     fn clone(&self) -> Self {
@@ -140,39 +144,39 @@ where
     }
 }
 
-impl<A, F, E> ServiceFactory for MapErrServiceFactory<A, F, E>
+impl<A, Req, F, E> ServiceFactory<Req> for MapErrServiceFactory<A, Req, F, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::Error) -> E + Clone,
 {
-    type Request = A::Request;
     type Response = A::Response;
     type Error = E;
 
     type Config = A::Config;
-    type Service = MapErr<A::Service, F, E>;
+    type Service = MapErr<A::Service, Req, F, E>;
     type InitError = A::InitError;
-    type Future = MapErrServiceFuture<A, F, E>;
+    type Future = MapErrServiceFuture<A, Req, F, E>;
 
     fn new_service(&self, cfg: A::Config) -> Self::Future {
         MapErrServiceFuture::new(self.a.new_service(cfg), self.f.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct MapErrServiceFuture<A, F, E>
-where
-    A: ServiceFactory,
-    F: Fn(A::Error) -> E,
-{
-    #[pin]
-    fut: A::Future,
-    f: F,
+pin_project! {
+    pub struct MapErrServiceFuture<A, Req, F, E>
+    where
+        A: ServiceFactory<Req>,
+        F: Fn(A::Error) -> E,
+    {
+        #[pin]
+        fut: A::Future,
+        f: F,
+    }
 }
 
-impl<A, F, E> MapErrServiceFuture<A, F, E>
+impl<A, Req, F, E> MapErrServiceFuture<A, Req, F, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::Error) -> E,
 {
     fn new(fut: A::Future, f: F) -> Self {
@@ -180,12 +184,12 @@ where
     }
 }
 
-impl<A, F, E> Future for MapErrServiceFuture<A, F, E>
+impl<A, Req, F, E> Future for MapErrServiceFuture<A, Req, F, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::Error) -> E + Clone,
 {
-    type Output = Result<MapErr<A::Service, F, E>, A::InitError>;
+    type Output = Result<MapErr<A::Service, Req, F, E>, A::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
@@ -199,15 +203,17 @@ where
 
 #[cfg(test)]
 mod tests {
-    use futures_util::future::{err, lazy, ok, Ready};
+    use futures_util::future::lazy;
 
     use super::*;
-    use crate::{IntoServiceFactory, Service, ServiceFactory};
+    use crate::{
+        err, ok, IntoServiceFactory, Ready, Service, ServiceExt, ServiceFactory,
+        ServiceFactoryExt,
+    };
 
     struct Srv;
 
-    impl Service for Srv {
-        type Request = ();
+    impl Service<()> for Srv {
         type Response = ();
         type Error = ();
         type Future = Ready<Result<(), ()>>;

actix-service/src/map_init_err.rs

@@ -1,21 +1,25 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::ServiceFactory;
 
 /// `MapInitErr` service combinator
-pub struct MapInitErr<A, F, E> {
+pub struct MapInitErr<A, F, Req, Err> {
     a: A,
     f: F,
-    e: PhantomData<E>,
+    e: PhantomData<(Req, Err)>,
 }
 
-impl<A, F, E> MapInitErr<A, F, E>
+impl<A, F, Req, Err> MapInitErr<A, F, Req, Err>
 where
-    A: ServiceFactory,
-    F: Fn(A::InitError) -> E,
+    A: ServiceFactory<Req>,
+    F: Fn(A::InitError) -> Err,
 {
     /// Create new `MapInitErr` combinator
     pub(crate) fn new(a: A, f: F) -> Self {
@@ -27,7 +31,7 @@ where
     }
 }
 
-impl<A, F, E> Clone for MapInitErr<A, F, E>
+impl<A, F, Req, E> Clone for MapInitErr<A, F, Req, E>
 where
     A: Clone,
     F: Clone,
@@ -41,39 +45,39 @@ where
     }
 }
 
-impl<A, F, E> ServiceFactory for MapInitErr<A, F, E>
+impl<A, F, Req, E> ServiceFactory<Req> for MapInitErr<A, F, Req, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::InitError) -> E + Clone,
 {
-    type Request = A::Request;
     type Response = A::Response;
     type Error = A::Error;
 
     type Config = A::Config;
     type Service = A::Service;
     type InitError = E;
-    type Future = MapInitErrFuture<A, F, E>;
+    type Future = MapInitErrFuture<A, F, Req, E>;
 
     fn new_service(&self, cfg: A::Config) -> Self::Future {
         MapInitErrFuture::new(self.a.new_service(cfg), self.f.clone())
     }
 }
 
-#[pin_project::pin_project]
-pub struct MapInitErrFuture<A, F, E>
-where
-    A: ServiceFactory,
-    F: Fn(A::InitError) -> E,
-{
-    f: F,
-    #[pin]
-    fut: A::Future,
+pin_project! {
+    pub struct MapInitErrFuture<A, F, Req, E>
+    where
+        A: ServiceFactory<Req>,
+        F: Fn(A::InitError) -> E,
+    {
+        f: F,
+        #[pin]
+        fut: A::Future,
+    }
 }
 
-impl<A, F, E> MapInitErrFuture<A, F, E>
+impl<A, F, Req, E> MapInitErrFuture<A, F, Req, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::InitError) -> E,
 {
     fn new(fut: A::Future, f: F) -> Self {
@@ -81,9 +85,9 @@ where
     }
 }
 
-impl<A, F, E> Future for MapInitErrFuture<A, F, E>
+impl<A, F, Req, E> Future for MapInitErrFuture<A, F, Req, E>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     F: Fn(A::InitError) -> E,
 {
     type Output = Result<A::Service, E>;

actix-service/src/pipeline.rs

@@ -1,8 +1,9 @@
-use std::future::Future;
-use std::task::{Context, Poll};
+use core::{
+    marker::PhantomData,
+    task::{Context, Poll},
+};
 
 use crate::and_then::{AndThenService, AndThenServiceFactory};
-use crate::and_then_apply_fn::{AndThenApplyFn, AndThenApplyFnFactory};
 use crate::map::{Map, MapServiceFactory};
 use crate::map_err::{MapErr, MapErrServiceFactory};
 use crate::map_init_err::MapInitErr;
@@ -10,33 +11,39 @@ use crate::then::{ThenService, ThenServiceFactory};
 use crate::{IntoService, IntoServiceFactory, Service, ServiceFactory};
 
 /// Construct new pipeline with one service in pipeline chain.
-pub fn pipeline<F, T>(service: F) -> Pipeline<T>
+pub fn pipeline<I, S, Req>(service: I) -> Pipeline<S, Req>
 where
-    F: IntoService<T>,
-    T: Service,
+    I: IntoService<S, Req>,
+    S: Service<Req>,
 {
     Pipeline {
         service: service.into_service(),
+        _phantom: PhantomData,
     }
 }
 
 /// Construct new pipeline factory with one service factory.
-pub fn pipeline_factory<T, F>(factory: F) -> PipelineFactory<T>
+pub fn pipeline_factory<I, SF, Req>(factory: I) -> PipelineFactory<SF, Req>
 where
-    T: ServiceFactory,
-    F: IntoServiceFactory<T>,
+    I: IntoServiceFactory<SF, Req>,
+    SF: ServiceFactory<Req>,
 {
     PipelineFactory {
         factory: factory.into_factory(),
+        _phantom: PhantomData,
     }
 }
 
 /// Pipeline service - pipeline allows to compose multiple service into one service.
-pub struct Pipeline<T> {
-    service: T,
+pub struct Pipeline<S, Req> {
+    service: S,
+    _phantom: PhantomData<Req>,
 }
 
-impl<T: Service> Pipeline<T> {
+impl<S, Req> Pipeline<S, Req>
+where
+    S: Service<Req>,
+{
     /// Call another service after call to this one has resolved successfully.
     ///
     /// This function can be used to chain two services together and ensure that
@@ -46,41 +53,18 @@ impl<T: Service> Pipeline<T> {
     ///
     /// Note that this function consumes the receiving service and returns a
     /// wrapped version of it.
-    pub fn and_then<F, U>(
+    pub fn and_then<I, S1>(
         self,
-        service: F,
-    ) -> Pipeline<
-        impl Service<Request = T::Request, Response = U::Response, Error = T::Error> + Clone,
-    >
+        service: I,
+    ) -> Pipeline<impl Service<Req, Response = S1::Response, Error = S::Error> + Clone, Req>
     where
         Self: Sized,
-        F: IntoService<U>,
-        U: Service<Request = T::Response, Error = T::Error>,
+        I: IntoService<S1, S::Response>,
+        S1: Service<S::Response, Error = S::Error>,
     {
         Pipeline {
             service: AndThenService::new(self.service, service.into_service()),
-        }
-    }
-
-    /// Apply function to specified service and use it as a next service in
-    /// chain.
-    ///
-    /// Short version of `pipeline_factory(...).and_then(apply_fn_factory(...))`
-    pub fn and_then_apply_fn<U, I, F, Fut, Res, Err>(
-        self,
-        service: I,
-        f: F,
-    ) -> Pipeline<impl Service<Request = T::Request, Response = Res, Error = Err> + Clone>
-    where
-        Self: Sized,
-        I: IntoService<U>,
-        U: Service,
-        F: FnMut(T::Response, &mut U) -> Fut,
-        Fut: Future<Output = Result<Res, Err>>,
-        Err: From<T::Error> + From<U::Error>,
-    {
-        Pipeline {
-            service: AndThenApplyFn::new(self.service, service.into_service(), f),
+            _phantom: PhantomData,
         }
     }
 
@@ -89,19 +73,18 @@ impl<T: Service> Pipeline<T> {
     ///
     /// Note that this function consumes the receiving pipeline and returns a
     /// wrapped version of it.
-    pub fn then<F, U>(
+    pub fn then<F, S1>(
         self,
         service: F,
-    ) -> Pipeline<
-        impl Service<Request = T::Request, Response = U::Response, Error = T::Error> + Clone,
-    >
+    ) -> Pipeline<impl Service<Req, Response = S1::Response, Error = S::Error> + Clone, Req>
     where
         Self: Sized,
-        F: IntoService<U>,
-        U: Service<Request = Result<T::Response, T::Error>, Error = T::Error>,
+        F: IntoService<S1, Result<S::Response, S::Error>>,
+        S1: Service<Result<S::Response, S::Error>, Error = S::Error>,
     {
         Pipeline {
             service: ThenService::new(self.service, service.into_service()),
+            _phantom: PhantomData,
         }
     }
 
@@ -114,13 +97,14 @@ impl<T: Service> Pipeline<T> {
     /// Note that this function consumes the receiving service and returns a
     /// wrapped version of it, similar to the existing `map` methods in the
     /// standard library.
-    pub fn map<F, R>(self, f: F) -> Pipeline<Map<T, F, R>>
+    pub fn map<F, R>(self, f: F) -> Pipeline<Map<S, F, Req, R>, Req>
     where
         Self: Sized,
-        F: FnMut(T::Response) -> R,
+        F: FnMut(S::Response) -> R,
     {
         Pipeline {
             service: Map::new(self.service, f),
+            _phantom: PhantomData,
         }
     }
 
@@ -132,114 +116,85 @@ impl<T: Service> Pipeline<T> {
     ///
     /// Note that this function consumes the receiving service and returns a
     /// wrapped version of it.
-    pub fn map_err<F, E>(self, f: F) -> Pipeline<MapErr<T, F, E>>
+    pub fn map_err<F, E>(self, f: F) -> Pipeline<MapErr<S, Req, F, E>, Req>
     where
         Self: Sized,
-        F: Fn(T::Error) -> E,
+        F: Fn(S::Error) -> E,
     {
         Pipeline {
             service: MapErr::new(self.service, f),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T> Clone for Pipeline<T>
+impl<T, Req> Clone for Pipeline<T, Req>
 where
     T: Clone,
 {
     fn clone(&self) -> Self {
         Pipeline {
             service: self.service.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T: Service> Service for Pipeline<T> {
-    type Request = T::Request;
-    type Response = T::Response;
-    type Error = T::Error;
-    type Future = T::Future;
+impl<S: Service<Req>, Req> Service<Req> for Pipeline<S, Req> {
+    type Response = S::Response;
+    type Error = S::Error;
+    type Future = S::Future;
 
     #[inline]
-    fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), T::Error>> {
+    fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), S::Error>> {
         self.service.poll_ready(ctx)
     }
 
     #[inline]
-    fn call(&mut self, req: T::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         self.service.call(req)
     }
 }
 
 /// Pipeline factory
-pub struct PipelineFactory<T> {
-    factory: T,
+pub struct PipelineFactory<SF, Req> {
+    factory: SF,
+    _phantom: PhantomData<Req>,
 }
 
-impl<T: ServiceFactory> PipelineFactory<T> {
+impl<SF, Req> PipelineFactory<SF, Req>
+where
+    SF: ServiceFactory<Req>,
+{
     /// Call another service after call to this one has resolved successfully.
-    pub fn and_then<F, U>(
+    pub fn and_then<I, SF1>(
         self,
-        factory: F,
+        factory: I,
     ) -> PipelineFactory<
         impl ServiceFactory<
-                Request = T::Request,
-                Response = U::Response,
-                Error = T::Error,
-                Config = T::Config,
-                InitError = T::InitError,
-                Service = impl Service<
-                    Request = T::Request,
-                    Response = U::Response,
-                    Error = T::Error,
-                > + Clone,
+                Req,
+                Response = SF1::Response,
+                Error = SF::Error,
+                Config = SF::Config,
+                InitError = SF::InitError,
+                Service = impl Service<Req, Response = SF1::Response, Error = SF::Error> + Clone,
             > + Clone,
+        Req,
     >
     where
         Self: Sized,
-        T::Config: Clone,
-        F: IntoServiceFactory<U>,
-        U: ServiceFactory<
-            Config = T::Config,
-            Request = T::Response,
-            Error = T::Error,
-            InitError = T::InitError,
+        SF::Config: Clone,
+        I: IntoServiceFactory<SF1, SF::Response>,
+        SF1: ServiceFactory<
+            SF::Response,
+            Config = SF::Config,
+            Error = SF::Error,
+            InitError = SF::InitError,
         >,
     {
         PipelineFactory {
             factory: AndThenServiceFactory::new(self.factory, factory.into_factory()),
-        }
-    }
-
-    /// Apply function to specified service and use it as a next service in
-    /// chain.
-    ///
-    /// Short version of `pipeline_factory(...).and_then(apply_fn_factory(...))`
-    pub fn and_then_apply_fn<U, I, F, Fut, Res, Err>(
-        self,
-        factory: I,
-        f: F,
-    ) -> PipelineFactory<
-        impl ServiceFactory<
-                Request = T::Request,
-                Response = Res,
-                Error = Err,
-                Config = T::Config,
-                InitError = T::InitError,
-                Service = impl Service<Request = T::Request, Response = Res, Error = Err> + Clone,
-            > + Clone,
-    >
-    where
-        Self: Sized,
-        T::Config: Clone,
-        I: IntoServiceFactory<U>,
-        U: ServiceFactory<Config = T::Config, InitError = T::InitError>,
-        F: FnMut(T::Response, &mut U::Service) -> Fut + Clone,
-        Fut: Future<Output = Result<Res, Err>>,
-        Err: From<T::Error> + From<U::Error>,
-    {
-        PipelineFactory {
-            factory: AndThenApplyFnFactory::new(self.factory, factory.into_factory(), f),
+            _phantom: PhantomData,
         }
     }
 
@@ -249,96 +204,103 @@ impl<T: ServiceFactory> PipelineFactory<T> {
     ///
     /// Note that this function consumes the receiving pipeline and returns a
     /// wrapped version of it.
-    pub fn then<F, U>(
+    pub fn then<I, SF1>(
         self,
-        factory: F,
+        factory: I,
     ) -> PipelineFactory<
         impl ServiceFactory<
-                Request = T::Request,
-                Response = U::Response,
-                Error = T::Error,
-                Config = T::Config,
-                InitError = T::InitError,
-                Service = impl Service<
-                    Request = T::Request,
-                    Response = U::Response,
-                    Error = T::Error,
-                > + Clone,
+                Req,
+                Response = SF1::Response,
+                Error = SF::Error,
+                Config = SF::Config,
+                InitError = SF::InitError,
+                Service = impl Service<Req, Response = SF1::Response, Error = SF::Error> + Clone,
             > + Clone,
+        Req,
     >
     where
         Self: Sized,
-        T::Config: Clone,
-        F: IntoServiceFactory<U>,
-        U: ServiceFactory<
-            Config = T::Config,
-            Request = Result<T::Response, T::Error>,
-            Error = T::Error,
-            InitError = T::InitError,
+        SF::Config: Clone,
+        I: IntoServiceFactory<SF1, Result<SF::Response, SF::Error>>,
+        SF1: ServiceFactory<
+            Result<SF::Response, SF::Error>,
+            Config = SF::Config,
+            Error = SF::Error,
+            InitError = SF::InitError,
         >,
     {
         PipelineFactory {
             factory: ThenServiceFactory::new(self.factory, factory.into_factory()),
+            _phantom: PhantomData,
         }
     }
 
     /// Map this service's output to a different type, returning a new service
     /// of the resulting type.
-    pub fn map<F, R>(self, f: F) -> PipelineFactory<MapServiceFactory<T, F, R>>
+    pub fn map<F, R>(self, f: F) -> PipelineFactory<MapServiceFactory<SF, F, Req, R>, Req>
     where
         Self: Sized,
-        F: FnMut(T::Response) -> R + Clone,
+        F: FnMut(SF::Response) -> R + Clone,
     {
         PipelineFactory {
             factory: MapServiceFactory::new(self.factory, f),
+            _phantom: PhantomData,
         }
     }
 
     /// Map this service's error to a different error, returning a new service.
-    pub fn map_err<F, E>(self, f: F) -> PipelineFactory<MapErrServiceFactory<T, F, E>>
+    pub fn map_err<F, E>(
+        self,
+        f: F,
+    ) -> PipelineFactory<MapErrServiceFactory<SF, Req, F, E>, Req>
     where
         Self: Sized,
-        F: Fn(T::Error) -> E + Clone,
+        F: Fn(SF::Error) -> E + Clone,
     {
         PipelineFactory {
             factory: MapErrServiceFactory::new(self.factory, f),
+            _phantom: PhantomData,
         }
     }
 
     /// Map this factory's init error to a different error, returning a new service.
-    pub fn map_init_err<F, E>(self, f: F) -> PipelineFactory<MapInitErr<T, F, E>>
+    pub fn map_init_err<F, E>(self, f: F) -> PipelineFactory<MapInitErr<SF, F, Req, E>, Req>
     where
         Self: Sized,
-        F: Fn(T::InitError) -> E + Clone,
+        F: Fn(SF::InitError) -> E + Clone,
     {
         PipelineFactory {
             factory: MapInitErr::new(self.factory, f),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T> Clone for PipelineFactory<T>
+impl<T, Req> Clone for PipelineFactory<T, Req>
 where
     T: Clone,
 {
     fn clone(&self) -> Self {
         PipelineFactory {
             factory: self.factory.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T: ServiceFactory> ServiceFactory for PipelineFactory<T> {
-    type Config = T::Config;
-    type Request = T::Request;
-    type Response = T::Response;
-    type Error = T::Error;
-    type Service = T::Service;
-    type InitError = T::InitError;
-    type Future = T::Future;
+impl<SF, Req> ServiceFactory<Req> for PipelineFactory<SF, Req>
+where
+    SF: ServiceFactory<Req>,
+{
+    type Config = SF::Config;
+    type Response = SF::Response;
+    type Error = SF::Error;
+    type Service = SF::Service;
+    type InitError = SF::InitError;
+    type Future = SF::Future;
 
     #[inline]
-    fn new_service(&self, cfg: T::Config) -> Self::Future {
+    fn new_service(&self, cfg: SF::Config) -> Self::Future {
         self.factory.new_service(cfg)
     }
 }

actix-service/src/ready.rs

@@ -0,0 +1,54 @@
+//! When MSRV is 1.48, replace with `core::future::Ready` and `core::future::ready()`.
+
+use core::{
+    future::Future,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+/// Future for the [`ready`](ready()) function.
+#[derive(Debug, Clone)]
+#[must_use = "futures do nothing unless you `.await` or poll them"]
+pub struct Ready<T> {
+    val: Option<T>,
+}
+
+impl<T> Ready<T> {
+    /// Unwraps the value from this immediately ready future.
+    #[inline]
+    pub fn into_inner(mut self) -> T {
+        self.val.take().unwrap()
+    }
+}
+
+impl<T> Unpin for Ready<T> {}
+
+impl<T> Future for Ready<T> {
+    type Output = T;
+
+    #[inline]
+    fn poll(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<T> {
+        let val = self.val.take().expect("Ready can not be polled twice.");
+        Poll::Ready(val)
+    }
+}
+
+/// Creates a future that is immediately ready with a value.
+#[allow(dead_code)]
+pub(crate) fn ready<T>(val: T) -> Ready<T> {
+    Ready { val: Some(val) }
+}
+
+/// Create a future that is immediately ready with a success value.
+#[allow(dead_code)]
+pub(crate) fn ok<T, E>(val: T) -> Ready<Result<T, E>> {
+    Ready { val: Some(Ok(val)) }
+}
+
+/// Create a future that is immediately ready with an error value.
+#[allow(dead_code)]
+pub(crate) fn err<T, E>(err: E) -> Ready<Result<T, E>> {
+    Ready {
+        val: Some(Err(err)),
+    }
+}

actix-service/src/then.rs

@@ -1,8 +1,13 @@
-use std::cell::RefCell;
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
+use alloc::rc::Rc;
+use core::{
+    cell::RefCell,
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::{Service, ServiceFactory};
 
@@ -10,34 +15,33 @@ use super::{Service, ServiceFactory};
 /// another service.
 ///
 /// This is created by the `Pipeline::then` method.
-pub(crate) struct ThenService<A, B>(Rc<RefCell<(A, B)>>);
+pub(crate) struct ThenService<A, B, Req>(Rc<RefCell<(A, B)>>, PhantomData<Req>);
 
-impl<A, B> ThenService<A, B> {
+impl<A, B, Req> ThenService<A, B, Req> {
     /// Create new `.then()` combinator
-    pub(crate) fn new(a: A, b: B) -> ThenService<A, B>
+    pub(crate) fn new(a: A, b: B) -> ThenService<A, B, Req>
     where
-        A: Service,
-        B: Service<Request = Result<A::Response, A::Error>, Error = A::Error>,
+        A: Service<Req>,
+        B: Service<Result<A::Response, A::Error>, Error = A::Error>,
     {
-        Self(Rc::new(RefCell::new((a, b))))
+        Self(Rc::new(RefCell::new((a, b))), PhantomData)
     }
 }
 
-impl<A, B> Clone for ThenService<A, B> {
+impl<A, B, Req> Clone for ThenService<A, B, Req> {
     fn clone(&self) -> Self {
-        ThenService(self.0.clone())
+        ThenService(self.0.clone(), PhantomData)
     }
 }
 
-impl<A, B> Service for ThenService<A, B>
+impl<A, B, Req> Service<Req> for ThenService<A, B, Req>
 where
-    A: Service,
-    B: Service<Request = Result<A::Response, A::Error>, Error = A::Error>,
+    A: Service<Req>,
+    B: Service<Result<A::Response, A::Error>, Error = A::Error>,
 {
-    type Request = A::Request;
     type Response = B::Response;
     type Error = B::Error;
-    type Future = ThenServiceResponse<A, B>;
+    type Future = ThenServiceResponse<A, B, Req>;
 
     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         let mut srv = self.0.borrow_mut();
@@ -49,38 +53,44 @@ where
         }
     }
 
-    fn call(&mut self, req: A::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         ThenServiceResponse {
-            state: State::A(self.0.borrow_mut().0.call(req), Some(self.0.clone())),
+            state: State::A {
+                fut: self.0.borrow_mut().0.call(req),
+                b: Some(self.0.clone()),
+            },
         }
     }
 }
 
-#[pin_project::pin_project]
-pub(crate) struct ThenServiceResponse<A, B>
-where
-    A: Service,
-    B: Service<Request = Result<A::Response, A::Error>>,
-{
-    #[pin]
-    state: State<A, B>,
+pin_project! {
+    pub(crate) struct ThenServiceResponse<A, B, Req>
+    where
+        A: Service<Req>,
+        B: Service<Result<A::Response, A::Error>>,
+    {
+        #[pin]
+        state: State<A, B, Req>,
+    }
 }
 
-#[pin_project::pin_project(project = StateProj)]
-enum State<A, B>
-where
-    A: Service,
-    B: Service<Request = Result<A::Response, A::Error>>,
-{
-    A(#[pin] A::Future, Option<Rc<RefCell<(A, B)>>>),
-    B(#[pin] B::Future),
-    Empty,
+pin_project! {
+    #[project = StateProj]
+    enum State<A, B, Req>
+    where
+        A: Service<Req>,
+        B: Service<Result<A::Response, A::Error>>,
+    {
+        A { #[pin] fut: A::Future, b: Option<Rc<RefCell<(A, B)>>> },
+        B { #[pin] fut: B::Future },
+        Empty,
+    }
 }
 
-impl<A, B> Future for ThenServiceResponse<A, B>
+impl<A, B, Req> Future for ThenServiceResponse<A, B, Req>
 where
-    A: Service,
-    B: Service<Request = Result<A::Response, A::Error>>,
+    A: Service<Req>,
+    B: Service<Result<A::Response, A::Error>>,
 {
     type Output = Result<B::Response, B::Error>;
 
@@ -88,17 +98,17 @@ where
         let mut this = self.as_mut().project();
 
         match this.state.as_mut().project() {
-            StateProj::A(fut, b) => match fut.poll(cx) {
+            StateProj::A { fut, b } => match fut.poll(cx) {
                 Poll::Ready(res) => {
                     let b = b.take().unwrap();
                     this.state.set(State::Empty); // drop fut A
                     let fut = b.borrow_mut().1.call(res);
-                    this.state.set(State::B(fut));
+                    this.state.set(State::B { fut });
                     self.poll(cx)
                 }
                 Poll::Pending => Poll::Pending,
             },
-            StateProj::B(fut) => fut.poll(cx).map(|r| {
+            StateProj::B { fut } => fut.poll(cx).map(|r| {
                 this.state.set(State::Empty);
                 r
             }),
@@ -110,44 +120,43 @@ where
 }
 
 /// `.then()` service factory combinator
-pub(crate) struct ThenServiceFactory<A, B>(Rc<(A, B)>);
+pub(crate) struct ThenServiceFactory<A, B, Req>(Rc<(A, B)>, PhantomData<Req>);
 
-impl<A, B> ThenServiceFactory<A, B>
+impl<A, B, Req> ThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        Result<A::Response, A::Error>,
         Config = A::Config,
-        Request = Result<A::Response, A::Error>,
         Error = A::Error,
         InitError = A::InitError,
     >,
 {
     /// Create new `AndThen` combinator
     pub(crate) fn new(a: A, b: B) -> Self {
-        Self(Rc::new((a, b)))
+        Self(Rc::new((a, b)), PhantomData)
     }
 }
 
-impl<A, B> ServiceFactory for ThenServiceFactory<A, B>
+impl<A, B, Req> ServiceFactory<Req> for ThenServiceFactory<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     A::Config: Clone,
     B: ServiceFactory<
+        Result<A::Response, A::Error>,
         Config = A::Config,
-        Request = Result<A::Response, A::Error>,
         Error = A::Error,
         InitError = A::InitError,
     >,
 {
-    type Request = A::Request;
     type Response = B::Response;
     type Error = A::Error;
 
     type Config = A::Config;
-    type Service = ThenService<A::Service, B::Service>;
+    type Service = ThenService<A::Service, B::Service, Req>;
     type InitError = A::InitError;
-    type Future = ThenServiceFactoryResponse<A, B>;
+    type Future = ThenServiceFactoryResponse<A, B, Req>;
 
     fn new_service(&self, cfg: A::Config) -> Self::Future {
         let srv = &*self.0;
@@ -155,37 +164,38 @@ where
     }
 }
 
-impl<A, B> Clone for ThenServiceFactory<A, B> {
+impl<A, B, Req> Clone for ThenServiceFactory<A, B, Req> {
     fn clone(&self) -> Self {
-        Self(self.0.clone())
+        Self(self.0.clone(), PhantomData)
     }
 }
 
-#[pin_project::pin_project]
-pub(crate) struct ThenServiceFactoryResponse<A, B>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<
-        Config = A::Config,
-        Request = Result<A::Response, A::Error>,
-        Error = A::Error,
-        InitError = A::InitError,
-    >,
-{
-    #[pin]
-    fut_b: B::Future,
-    #[pin]
-    fut_a: A::Future,
-    a: Option<A::Service>,
-    b: Option<B::Service>,
+pin_project! {
+    pub(crate) struct ThenServiceFactoryResponse<A, B, Req>
+    where
+        A: ServiceFactory<Req>,
+        B: ServiceFactory<
+            Result<A::Response, A::Error>,
+            Config = A::Config,
+            Error = A::Error,
+            InitError = A::InitError,
+        >,
+    {
+        #[pin]
+        fut_b: B::Future,
+        #[pin]
+        fut_a: A::Future,
+        a: Option<A::Service>,
+        b: Option<B::Service>,
+    }
 }
 
-impl<A, B> ThenServiceFactoryResponse<A, B>
+impl<A, B, Req> ThenServiceFactoryResponse<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     B: ServiceFactory<
+        Result<A::Response, A::Error>,
         Config = A::Config,
-        Request = Result<A::Response, A::Error>,
         Error = A::Error,
         InitError = A::InitError,
     >,
@@ -200,17 +210,17 @@ where
     }
 }
 
-impl<A, B> Future for ThenServiceFactoryResponse<A, B>
+impl<A, B, Req> Future for ThenServiceFactoryResponse<A, B, Req>
 where
-    A: ServiceFactory,
+    A: ServiceFactory<Req>,
     B: ServiceFactory<
+        Result<A::Response, A::Error>,
         Config = A::Config,
-        Request = Result<A::Response, A::Error>,
         Error = A::Error,
         InitError = A::InitError,
     >,
 {
-    type Output = Result<ThenService<A::Service, B::Service>, A::InitError>;
+    type Output = Result<ThenService<A::Service, B::Service, Req>, A::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
@@ -238,19 +248,20 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::cell::Cell;
-    use std::rc::Rc;
-    use std::task::{Context, Poll};
+    use alloc::rc::Rc;
+    use core::{
+        cell::Cell,
+        task::{Context, Poll},
+    };
 
-    use futures_util::future::{err, lazy, ok, ready, Ready};
+    use futures_util::future::lazy;
 
-    use crate::{pipeline, pipeline_factory, Service, ServiceFactory};
+    use crate::{err, ok, pipeline, pipeline_factory, ready, Ready, Service, ServiceFactory};
 
     #[derive(Clone)]
     struct Srv1(Rc<Cell<usize>>);
 
-    impl Service for Srv1 {
-        type Request = Result<&'static str, &'static str>;
+    impl Service<Result<&'static str, &'static str>> for Srv1 {
         type Response = &'static str;
         type Error = ();
         type Future = Ready<Result<Self::Response, Self::Error>>;
@@ -270,8 +281,7 @@ mod tests {
 
     struct Srv2(Rc<Cell<usize>>);
 
-    impl Service for Srv2 {
-        type Request = Result<&'static str, ()>;
+    impl Service<Result<&'static str, ()>> for Srv2 {
         type Response = (&'static str, &'static str);
         type Error = ();
         type Future = Ready<Result<Self::Response, ()>>;

actix-service/src/transform.rs

@@ -1,18 +1,22 @@
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::sync::Arc;
-use std::task::{Context, Poll};
+use alloc::{rc::Rc, sync::Arc};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use crate::transform_err::TransformMapInitErr;
 use crate::{IntoServiceFactory, Service, ServiceFactory};
 
 /// Apply transform to a service.
-pub fn apply<T, S, U>(t: T, factory: U) -> ApplyTransform<T, S>
+pub fn apply<T, S, I, Req>(t: T, factory: I) -> ApplyTransform<T, S, Req>
 where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
-    U: IntoServiceFactory<S>,
+    I: IntoServiceFactory<S, Req>,
+    S: ServiceFactory<Req>,
+    T: Transform<S::Service, Req, InitError = S::InitError>,
 {
     ApplyTransform::new(t, factory.into_factory())
 }
@@ -89,10 +93,7 @@ where
 ///     }
 /// }
 /// ```
-pub trait Transform<S> {
-    /// Requests handled by the service.
-    type Request;
-
+pub trait Transform<S, Req> {
     /// Responses given by the service.
     type Response;
 
@@ -100,11 +101,7 @@ pub trait Transform<S> {
     type Error;
 
     /// The `TransformService` value created by this factory
-    type Transform: Service<
-        Request = Self::Request,
-        Response = Self::Response,
-        Error = Self::Error,
-    >;
+    type Transform: Service<Req, Response = Self::Response, Error = Self::Error>;
 
     /// Errors produced while building a transform service.
     type InitError;
@@ -117,7 +114,7 @@ pub trait Transform<S> {
 
     /// Map this transform's factory error to a different error,
     /// returning a new transform service factory.
-    fn map_init_err<F, E>(self, f: F) -> TransformMapInitErr<Self, S, F, E>
+    fn map_init_err<F, E>(self, f: F) -> TransformMapInitErr<Self, S, Req, F, E>
     where
         Self: Sized,
         F: Fn(Self::InitError) -> E + Clone,
@@ -126,11 +123,10 @@ pub trait Transform<S> {
     }
 }
 
-impl<T, S> Transform<S> for Rc<T>
+impl<T, S, Req> Transform<S, Req> for Rc<T>
 where
-    T: Transform<S>,
+    T: Transform<S, Req>,
 {
-    type Request = T::Request;
     type Response = T::Response;
     type Error = T::Error;
     type InitError = T::InitError;
@@ -142,11 +138,10 @@ where
     }
 }
 
-impl<T, S> Transform<S> for Arc<T>
+impl<T, S, Req> Transform<S, Req> for Arc<T>
 where
-    T: Transform<S>,
+    T: Transform<S, Req>,
 {
-    type Request = T::Request;
     type Response = T::Response;
     type Error = T::Error;
     type InitError = T::InitError;
@@ -159,72 +154,76 @@ where
 }
 
 /// `Apply` transform to new service
-pub struct ApplyTransform<T, S>(Rc<(T, S)>);
+pub struct ApplyTransform<T, S, Req>(Rc<(T, S)>, PhantomData<Req>);
 
-impl<T, S> ApplyTransform<T, S>
+impl<T, S, Req> ApplyTransform<T, S, Req>
 where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
+    S: ServiceFactory<Req>,
+    T: Transform<S::Service, Req, InitError = S::InitError>,
 {
     /// Create new `ApplyTransform` new service instance
     fn new(t: T, service: S) -> Self {
-        Self(Rc::new((t, service)))
+        Self(Rc::new((t, service)), PhantomData)
     }
 }
 
-impl<T, S> Clone for ApplyTransform<T, S> {
+impl<T, S, Req> Clone for ApplyTransform<T, S, Req> {
     fn clone(&self) -> Self {
-        ApplyTransform(self.0.clone())
+        ApplyTransform(self.0.clone(), PhantomData)
     }
 }
 
-impl<T, S> ServiceFactory for ApplyTransform<T, S>
+impl<T, S, Req> ServiceFactory<Req> for ApplyTransform<T, S, Req>
 where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
+    S: ServiceFactory<Req>,
+    T: Transform<S::Service, Req, InitError = S::InitError>,
 {
-    type Request = T::Request;
     type Response = T::Response;
     type Error = T::Error;
 
     type Config = S::Config;
     type Service = T::Transform;
     type InitError = T::InitError;
-    type Future = ApplyTransformFuture<T, S>;
+    type Future = ApplyTransformFuture<T, S, Req>;
 
     fn new_service(&self, cfg: S::Config) -> Self::Future {
         ApplyTransformFuture {
             store: self.0.clone(),
-            state: ApplyTransformFutureState::A(self.0.as_ref().1.new_service(cfg)),
+            state: ApplyTransformFutureState::A {
+                fut: self.0.as_ref().1.new_service(cfg),
+            },
         }
     }
 }
 
-#[pin_project::pin_project]
-pub struct ApplyTransformFuture<T, S>
-where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
-{
-    store: Rc<(T, S)>,
-    #[pin]
-    state: ApplyTransformFutureState<T, S>,
+pin_project! {
+    pub struct ApplyTransformFuture<T, S, Req>
+    where
+        S: ServiceFactory<Req>,
+        T: Transform<S::Service, Req, InitError = S::InitError>,
+    {
+        store: Rc<(T, S)>,
+        #[pin]
+        state: ApplyTransformFutureState<T, S, Req>,
+    }
 }
 
-#[pin_project::pin_project(project = ApplyTransformFutureStateProj)]
-pub enum ApplyTransformFutureState<T, S>
-where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
-{
-    A(#[pin] S::Future),
-    B(#[pin] T::Future),
+pin_project! {
+    #[project = ApplyTransformFutureStateProj]
+    pub enum ApplyTransformFutureState<T, S, Req>
+    where
+        S: ServiceFactory<Req>,
+        T: Transform<S::Service, Req, InitError = S::InitError>,
+    {
+        A { #[pin] fut: S::Future },
+        B { #[pin] fut: T::Future },
+    }
 }
 
-impl<T, S> Future for ApplyTransformFuture<T, S>
+impl<T, S, Req> Future for ApplyTransformFuture<T, S, Req>
 where
-    S: ServiceFactory,
-    T: Transform<S::Service, InitError = S::InitError>,
+    S: ServiceFactory<Req>,
+    T: Transform<S::Service, Req, InitError = S::InitError>,
 {
     type Output = Result<T::Transform, T::InitError>;
 
@@ -232,15 +231,15 @@ where
         let mut this = self.as_mut().project();
 
         match this.state.as_mut().project() {
-            ApplyTransformFutureStateProj::A(fut) => match fut.poll(cx)? {
+            ApplyTransformFutureStateProj::A { fut } => match fut.poll(cx)? {
                 Poll::Ready(srv) => {
                     let fut = this.store.0.new_transform(srv);
-                    this.state.set(ApplyTransformFutureState::B(fut));
+                    this.state.set(ApplyTransformFutureState::B { fut });
                     self.poll(cx)
                 }
                 Poll::Pending => Poll::Pending,
             },
-            ApplyTransformFutureStateProj::B(fut) => fut.poll(cx),
+            ApplyTransformFutureStateProj::B { fut } => fut.poll(cx),
         }
     }
 }

actix-service/src/transform_err.rs

@@ -1,7 +1,11 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use pin_project_lite::pin_project;
 
 use super::Transform;
 
@@ -9,75 +13,75 @@ use super::Transform;
 /// transform's init error.
 ///
 /// This is created by the `Transform::map_init_err` method.
-pub struct TransformMapInitErr<T, S, F, E> {
-    t: T,
-    f: F,
-    e: PhantomData<(S, E)>,
+pub struct TransformMapInitErr<T, S, Req, F, E> {
+    transform: T,
+    mapper: F,
+    _phantom: PhantomData<(S, Req, E)>,
 }
 
-impl<T, S, F, E> TransformMapInitErr<T, S, F, E> {
+impl<T, S, F, E, Req> TransformMapInitErr<T, S, Req, F, E> {
     pub(crate) fn new(t: T, f: F) -> Self
     where
-        T: Transform<S>,
+        T: Transform<S, Req>,
         F: Fn(T::InitError) -> E,
     {
         Self {
-            t,
-            f,
-            e: PhantomData,
+            transform: t,
+            mapper: f,
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, S, F, E> Clone for TransformMapInitErr<T, S, F, E>
+impl<T, S, Req, F, E> Clone for TransformMapInitErr<T, S, Req, F, E>
 where
     T: Clone,
     F: Clone,
 {
     fn clone(&self) -> Self {
         Self {
-            t: self.t.clone(),
-            f: self.f.clone(),
-            e: PhantomData,
+            transform: self.transform.clone(),
+            mapper: self.mapper.clone(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<T, S, F, E> Transform<S> for TransformMapInitErr<T, S, F, E>
+impl<T, S, F, E, Req> Transform<S, Req> for TransformMapInitErr<T, S, Req, F, E>
 where
-    T: Transform<S>,
+    T: Transform<S, Req>,
     F: Fn(T::InitError) -> E + Clone,
 {
-    type Request = T::Request;
     type Response = T::Response;
     type Error = T::Error;
     type Transform = T::Transform;
 
     type InitError = E;
-    type Future = TransformMapInitErrFuture<T, S, F, E>;
+    type Future = TransformMapInitErrFuture<T, S, F, E, Req>;
 
     fn new_transform(&self, service: S) -> Self::Future {
         TransformMapInitErrFuture {
-            fut: self.t.new_transform(service),
-            f: self.f.clone(),
+            fut: self.transform.new_transform(service),
+            f: self.mapper.clone(),
         }
     }
 }
 
-#[pin_project::pin_project]
-pub struct TransformMapInitErrFuture<T, S, F, E>
-where
-    T: Transform<S>,
+pin_project! {
+    pub struct TransformMapInitErrFuture<T, S, F, E, Req>
+    where
+    T: Transform<S, Req>,
     F: Fn(T::InitError) -> E,
-{
-    #[pin]
-    fut: T::Future,
-    f: F,
+    {
+        #[pin]
+        fut: T::Future,
+        f: F,
+    }
 }
 
-impl<T, S, F, E> Future for TransformMapInitErrFuture<T, S, F, E>
+impl<T, S, F, E, Req> Future for TransformMapInitErrFuture<T, S, F, E, Req>
 where
-    T: Transform<S>,
+    T: Transform<S, Req>,
     F: Fn(T::InitError) -> E + Clone,
 {
     type Output = Result<T::Transform, E>;

actix-testing/CHANGES.md

@@ -1,33 +1,37 @@
 # Changes
 
-## [1.0.1] - 2020-05-19
+## Unreleased - 2021-xx-xx
 
+
+## 2.0.0-beta.1 - 2020-12-28
+* Update `actix-server` to v2.0.0-beta.1.
+
+
+## 1.0.1 - 2020-05-19
 * Replace deprecated `net2` crate with `socket2`
-
 * Remove unused `futures` dependency
 
-## [1.0.0] - 2019-12-11
 
+## 1.0.0 - 2019-12-11
 * Update actix-server to 1.0.0
 
-## [1.0.0-alpha.3] - 2019-12-07
 
+## 1.0.0-alpha.3 - 2019-12-07
 * Migrate to tokio 0.2
 
-## [1.0.0-alpha.2] - 2019-12-02
 
+## 1.0.0-alpha.2 - 2019-12-02
 * Re-export `test` attribute macros
 
 
-## [0.3.0-alpha.1] - 2019-11-22
 
+## 0.3.0-alpha.1 - 2019-11-22
 * Migrate to std::future
 
-## [0.2.0] - 2019-10-14
 
+## 0.2.0 - 2019-10-14
 * Upgrade actix-server and actix-server-config deps
 
 
-## [0.1.0] - 2019-09-25
-
+## 0.1.0 - 2019-09-25
 * Initial impl

actix-testing/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "actix-testing"
-version = "1.0.1"
+version = "2.0.0-beta.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "Actix testing utils"
+description = "Various helpers for Actix applications to use during testing"
 keywords = ["network", "framework", "async", "futures"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
@@ -10,7 +10,6 @@ documentation = "https://docs.rs/actix-testing/"
 categories = ["network-programming", "asynchronous"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
-workspace = ".."
 readme = "README.md"
 
 [lib]
@@ -18,10 +17,10 @@ name = "actix_testing"
 path = "src/lib.rs"
 
 [dependencies]
-actix-rt = "1.0.0"
+actix-rt = "2.0.0-beta.1"
 actix-macros = "0.1.0"
-actix-server = "1.0.0"
-actix-service = "1.0.0"
+actix-server = "2.0.0-beta.1"
+actix-service = "2.0.0-beta.1"
 
 log = "0.4"
 socket2 = "0.3"

actix-testing/README.md

@@ -6,4 +6,4 @@
 * [API Documentation](https://docs.rs/actix-testing/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-http-test](https://crates.io/crates/actix-testing)
-* Minimum supported Rust version: 1.37 or later
+* Minimum supported Rust version: 1.46 or later

actix-testing/src/lib.rs

@@ -1,6 +1,9 @@
 //! Various helpers for Actix applications to use during testing.
-#![deny(rust_2018_idioms, warnings)]
+
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity, clippy::needless_doctest_main)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use std::sync::mpsc;
 use std::{net, thread};
@@ -84,13 +87,15 @@ impl TestServer {
             let tcp = net::TcpListener::bind("127.0.0.1:0").unwrap();
             let local_addr = tcp.local_addr().unwrap();
 
-            Server::build()
-                .listen("test", tcp, factory)?
-                .workers(1)
-                .disable_signals()
-                .start();
-
-            tx.send((System::current(), local_addr)).unwrap();
+            sys.block_on(async {
+                Server::build()
+                    .listen("test", tcp, factory)
+                    .unwrap()
+                    .workers(1)
+                    .disable_signals()
+                    .start();
+                tx.send((System::current(), local_addr)).unwrap();
+            });
             sys.run()
         });
 

actix-threadpool/src/lib.rs

@@ -1,5 +1,9 @@
 //! Thread pool for blocking operations
 
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
 use std::fmt;
 use std::future::Future;
 use std::pin::Pin;

actix-tls/CHANGES.md

@@ -1,6 +1,14 @@
 # Changes
 
-## Unreleased - 2020-xx-xx
+## Unreleased - 2021-xx-xx
+
+
+## 3.0.0-beta.1 - 2020-12-29
+* Move acceptors under `accept` module. [#238]
+* Merge `actix-connect` crate under `connect` module. [#238]
+* Add feature flags to enable acceptors and/or connectors individually. [#238]
+
+[#238]: https://github.com/actix/actix-net/pull/238
 
 
 ## 2.0.0 - 2020-09-03

actix-tls/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "actix-tls"
-version = "2.0.0"
+version = "3.0.0-beta.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "TLS acceptor services for Actix ecosystem."
-keywords = ["network", "framework", "async", "tls", "ssl"]
+description = "TLS acceptor and connector services for Actix ecosystem"
+keywords = ["network", "tls", "ssl", "async", "transport"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
 documentation = "https://docs.rs/actix-tls/"
@@ -12,7 +12,7 @@ license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [package.metadata.docs.rs]
-features = ["openssl", "rustls", "nativetls"]
+features = ["openssl", "rustls", "native-tls", "accept", "connect", "http"]
 
 [lib]
 name = "actix_tls"
@@ -20,45 +20,59 @@ path = "src/lib.rs"
 
 [[example]]
 name = "basic"
-required-features = ["rustls"]
+required-features = ["accept", "rustls"]
 
 [features]
-default = []
+default = ["accept", "connect", "http"]
 
-# openssl
-openssl = ["open-ssl", "tokio-openssl"]
+# enable acceptor services
+accept = []
 
-# rustls
-rustls = ["rust-tls", "webpki", "webpki-roots", "tokio-rustls"]
+# enable connector services
+connect = []
 
-# nativetls
-nativetls = ["native-tls", "tokio-tls"]
+# use openssl impls
+openssl = ["tls-openssl", "tokio-openssl"]
+
+# use rustls impls
+rustls = ["tls-rustls", "webpki", "webpki-roots", "tokio-rustls"]
+
+# use native-tls impls
+native-tls = ["tls-native-tls", "tokio-native-tls"]
 
 [dependencies]
-actix-service = "1.0.0"
-actix-codec = "0.3.0"
-actix-utils = "2.0.0"
+actix-codec = "0.4.0-beta.1"
+actix-rt = "2.0.0-beta.1"
+actix-service = "2.0.0-beta.1"
+actix-utils = "3.0.0-beta.1"
 
-futures-util = { version = "0.3.4", default-features = false }
+derive_more = "0.99.5"
+either = "1.6"
+futures-util = { version = "0.3.7", default-features = false }
+http = { version = "0.2.0", optional = true }
+log = "0.4"
+trust-dns-proto = { version = "0.19", default-features = false, features = ["tokio-runtime"] }
+trust-dns-resolver = { version = "0.19", default-features = false, features = ["tokio-runtime", "system-config"] }
 
 # openssl
-open-ssl = { package = "openssl", version = "0.10", optional = true }
-tokio-openssl = { version = "0.4.0", optional = true }
+tls-openssl = { package = "openssl", version = "0.10", optional = true }
+tokio-openssl = { version = "0.6", optional = true }
+
+# TODO: Reduce dependencies where tokio wrappers re-export base crate.
 
 # rustls
-rust-tls = { package = "rustls", version = "0.18.0", optional = true }
+tls-rustls = { package = "rustls", version = "0.19", optional = true }
+tokio-rustls = { version = "0.22", optional = true }
 webpki = { version = "0.21", optional = true }
-webpki-roots = { version = "0.20", optional = true }
-tokio-rustls = { version = "0.14.0", optional = true }
+webpki-roots = { version = "0.21", optional = true }
 
 # native-tls
-native-tls = { version = "0.2", optional = true }
-tokio-tls = { version = "0.3", optional = true }
+tls-native-tls = { package = "native-tls", version = "0.2", optional = true }
+tokio-native-tls = { version = "0.3", optional = true }
 
 [dev-dependencies]
-bytes = "0.5"
+actix-server = "2.0.0-beta.1"
+actix-testing = "2.0.0-beta.1"
+bytes = "1"
 log = "0.4"
-env_logger = "0.7"
-actix-testing = "1.0.0"
-actix-server = "1"
-actix-rt = "1"
+env_logger = "0.8"

actix-tls/examples/basic.rs

@@ -15,6 +15,10 @@
 //! http --verify=false https://127.0.0.1:8443
 //! ```
 
+// this rename only exists because of how we have organised the crate's feature flags
+// it is not necessary for your actual code
+extern crate tls_rustls as rustls;
+
 use std::{
     env,
     fs::File,
@@ -27,10 +31,10 @@ use std::{
 
 use actix_server::Server;
 use actix_service::pipeline_factory;
-use actix_tls::rustls::Acceptor as RustlsAcceptor;
+use actix_tls::accept::rustls::Acceptor as RustlsAcceptor;
 use futures_util::future::ok;
 use log::info;
-use rust_tls::{
+use rustls::{
     internal::pemfile::certs, internal::pemfile::rsa_private_keys, NoClientAuth, ServerConfig,
 };
 

actix-tls/src/accept/mod.rs

@@ -0,0 +1,42 @@
+//! TLS acceptor services for Actix ecosystem.
+//!
+//! ## Crate Features
+//! * `openssl` - TLS acceptor using the `openssl` crate.
+//! * `rustls` - TLS acceptor using the `rustls` crate.
+//! * `native-tls` - TLS acceptor using the `native-tls` crate.
+
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+use actix_utils::counter::Counter;
+
+#[cfg(feature = "openssl")]
+pub mod openssl;
+
+#[cfg(feature = "rustls")]
+pub mod rustls;
+
+#[cfg(feature = "native-tls")]
+pub mod nativetls;
+
+pub(crate) static MAX_CONN: AtomicUsize = AtomicUsize::new(256);
+
+thread_local! {
+    static MAX_CONN_COUNTER: Counter = Counter::new(MAX_CONN.load(Ordering::Relaxed));
+}
+
+/// Sets the maximum per-worker concurrent TLS connection limit.
+///
+/// All listeners will stop accepting connections when this limit is reached.
+/// It can be used to regulate the global TLS CPU usage.
+///
+/// By default, the connection limit is 256.
+pub fn max_concurrent_tls_connect(num: usize) {
+    MAX_CONN.store(num, Ordering::Relaxed);
+}
+
+/// TLS error combined with service error.
+#[derive(Debug)]
+pub enum TlsError<E1, E2> {
+    Tls(E1),
+    Service(E2),
+}

actix-tls/src/accept/nativetls.rs

@@ -7,13 +7,13 @@ use actix_utils::counter::Counter;
 use futures_util::future::{self, FutureExt, LocalBoxFuture, TryFutureExt};
 
 pub use native_tls::Error;
-pub use tokio_tls::{TlsAcceptor, TlsStream};
+pub use tokio_native_tls::{TlsAcceptor, TlsStream};
 
-use crate::MAX_CONN_COUNTER;
+use super::MAX_CONN_COUNTER;
 
 /// Accept TLS connections via `native-tls` package.
 ///
-/// `nativetls` feature enables this `Acceptor` type.
+/// `native-tls` feature enables this `Acceptor` type.
 pub struct Acceptor<T> {
     acceptor: TlsAcceptor,
     io: PhantomData<T>,
@@ -43,11 +43,10 @@ impl<T> Clone for Acceptor<T> {
     }
 }
 
-impl<T> ServiceFactory for Acceptor<T>
+impl<T> ServiceFactory<T> for Acceptor<T>
 where
     T: AsyncRead + AsyncWrite + Unpin + 'static,
 {
-    type Request = T;
     type Response = TlsStream<T>;
     type Error = Error;
     type Service = NativeTlsAcceptorService<T>;
@@ -83,11 +82,10 @@ impl<T> Clone for NativeTlsAcceptorService<T> {
     }
 }
 
-impl<T> Service for NativeTlsAcceptorService<T>
+impl<T> Service<T> for NativeTlsAcceptorService<T>
 where
     T: AsyncRead + AsyncWrite + Unpin + 'static,
 {
-    type Request = T;
     type Response = TlsStream<T>;
     type Error = Error;
     type Future = LocalBoxFuture<'static, Result<TlsStream<T>, Error>>;
@@ -100,10 +98,10 @@ where
         }
     }
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, io: T) -> Self::Future {
         let guard = self.conns.get();
         let this = self.clone();
-        async move { this.acceptor.accept(req).await }
+        async move { this.acceptor.accept(io).await }
             .map_ok(move |io| {
                 // Required to preserve `CounterGuard` until `Self::Future` is completely resolved.
                 let _ = guard;

actix-tls/src/accept/openssl.rs

@@ -6,12 +6,17 @@ use std::task::{Context, Poll};
 use actix_codec::{AsyncRead, AsyncWrite};
 use actix_service::{Service, ServiceFactory};
 use actix_utils::counter::{Counter, CounterGuard};
-use futures_util::future::{ok, FutureExt, LocalBoxFuture, Ready};
+use futures_util::{
+    future::{ok, Ready},
+    ready,
+};
 
-pub use open_ssl::ssl::{AlpnError, SslAcceptor, SslAcceptorBuilder};
-pub use tokio_openssl::{HandshakeError, SslStream};
+pub use openssl::ssl::{
+    AlpnError, Error as SslError, HandshakeError, Ssl, SslAcceptor, SslAcceptorBuilder,
+};
+pub use tokio_openssl::SslStream;
 
-use crate::MAX_CONN_COUNTER;
+use super::MAX_CONN_COUNTER;
 
 /// Accept TLS connections via `openssl` package.
 ///
@@ -42,10 +47,12 @@ impl<T: AsyncRead + AsyncWrite> Clone for Acceptor<T> {
     }
 }
 
-impl<T: AsyncRead + AsyncWrite + Unpin + 'static> ServiceFactory for Acceptor<T> {
-    type Request = T;
+impl<T> ServiceFactory<T> for Acceptor<T>
+where
+    T: AsyncRead + AsyncWrite + Unpin + 'static,
+{
     type Response = SslStream<T>;
-    type Error = HandshakeError<T>;
+    type Error = SslError;
     type Config = ();
     type Service = AcceptorService<T>;
     type InitError = ();
@@ -68,10 +75,12 @@ pub struct AcceptorService<T> {
     io: PhantomData<T>,
 }
 
-impl<T: AsyncRead + AsyncWrite + Unpin + 'static> Service for AcceptorService<T> {
-    type Request = T;
+impl<T> Service<T> for AcceptorService<T>
+where
+    T: AsyncRead + AsyncWrite + Unpin + 'static,
+{
     type Response = SslStream<T>;
-    type Error = HandshakeError<T>;
+    type Error = SslError;
     type Future = AcceptorServiceResponse<T>;
 
     fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
@@ -82,15 +91,14 @@ impl<T: AsyncRead + AsyncWrite + Unpin + 'static> Service for AcceptorService<T>
         }
     }
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, io: T) -> Self::Future {
         let acc = self.acceptor.clone();
+        let ssl_ctx = acc.into_context();
+        let ssl = Ssl::new(&ssl_ctx).expect("Provided SSL acceptor was invalid.");
+
         AcceptorServiceResponse {
             _guard: self.conns.get(),
-            fut: async move {
-                let acc = acc;
-                tokio_openssl::accept(&acc, req).await
-            }
-            .boxed_local(),
+            stream: Some(SslStream::new(ssl, io).unwrap()),
         }
     }
 }
@@ -99,15 +107,15 @@ pub struct AcceptorServiceResponse<T>
 where
     T: AsyncRead + AsyncWrite,
 {
-    fut: LocalBoxFuture<'static, Result<SslStream<T>, HandshakeError<T>>>,
+    stream: Option<SslStream<T>>,
     _guard: CounterGuard,
 }
 
 impl<T: AsyncRead + AsyncWrite + Unpin> Future for AcceptorServiceResponse<T> {
-    type Output = Result<SslStream<T>, HandshakeError<T>>;
+    type Output = Result<SslStream<T>, SslError>;
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let io = futures_util::ready!(Pin::new(&mut self.fut).poll(cx))?;
-        Poll::Ready(Ok(io))
+        ready!(Pin::new(self.stream.as_mut().unwrap()).poll_accept(cx))?;
+        Poll::Ready(Ok(self.stream.take().expect("SSL connect has resolved.")))
     }
 }

actix-tls/src/accept/rustls.rs

@@ -11,11 +11,11 @@ use actix_utils::counter::{Counter, CounterGuard};
 use futures_util::future::{ok, Ready};
 use tokio_rustls::{Accept, TlsAcceptor};
 
-pub use rust_tls::{ServerConfig, Session};
+pub use rustls::{ServerConfig, Session};
 pub use tokio_rustls::server::TlsStream;
 pub use webpki_roots::TLS_SERVER_ROOTS;
 
-use crate::MAX_CONN_COUNTER;
+use super::MAX_CONN_COUNTER;
 
 /// Accept TLS connections via `rustls` package.
 ///
@@ -25,7 +25,10 @@ pub struct Acceptor<T> {
     io: PhantomData<T>,
 }
 
-impl<T: AsyncRead + AsyncWrite> Acceptor<T> {
+impl<T> Acceptor<T>
+where
+    T: AsyncRead + AsyncWrite,
+{
     /// Create Rustls based `Acceptor` service factory.
     #[inline]
     pub fn new(config: ServerConfig) -> Self {
@@ -46,8 +49,10 @@ impl<T> Clone for Acceptor<T> {
     }
 }
 
-impl<T: AsyncRead + AsyncWrite + Unpin> ServiceFactory for Acceptor<T> {
-    type Request = T;
+impl<T> ServiceFactory<T> for Acceptor<T>
+where
+    T: AsyncRead + AsyncWrite + Unpin,
+{
     type Response = TlsStream<T>;
     type Error = io::Error;
     type Service = AcceptorService<T>;
@@ -74,8 +79,10 @@ pub struct AcceptorService<T> {
     conns: Counter,
 }
 
-impl<T: AsyncRead + AsyncWrite + Unpin> Service for AcceptorService<T> {
-    type Request = T;
+impl<T> Service<T> for AcceptorService<T>
+where
+    T: AsyncRead + AsyncWrite + Unpin,
+{
     type Response = TlsStream<T>;
     type Error = io::Error;
     type Future = AcceptorServiceFut<T>;
@@ -88,7 +95,7 @@ impl<T: AsyncRead + AsyncWrite + Unpin> Service for AcceptorService<T> {
         }
     }
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, req: T) -> Self::Future {
         AcceptorServiceFut {
             _guard: self.conns.get(),
             fut: self.acceptor.accept(req),
@@ -104,7 +111,10 @@ where
     _guard: CounterGuard,
 }
 
-impl<T: AsyncRead + AsyncWrite + Unpin> Future for AcceptorServiceFut<T> {
+impl<T> Future for AcceptorServiceFut<T>
+where
+    T: AsyncRead + AsyncWrite + Unpin,
+{
     type Output = Result<TlsStream<T>, io::Error>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {

actix-tls/src/connect/connect.rs

@@ -138,7 +138,7 @@ impl<T: Address> fmt::Display for Connect<T> {
     }
 }
 
-/// Iterator over addresses in a [`Connect`](struct.Connect.html) request.
+/// Iterator over addresses in a [`Connect`] request.
 #[derive(Clone)]
 pub struct ConnectAddrsIter<'a> {
     inner: Either<Option<SocketAddr>, vec_deque::Iter<'a, SocketAddr>>,
@@ -173,7 +173,7 @@ impl ExactSizeIterator for ConnectAddrsIter<'_> {}
 
 impl FusedIterator for ConnectAddrsIter<'_> {}
 
-/// Owned iterator over addresses in a [`Connect`](struct.Connect.html) request.
+/// Owned iterator over addresses in a [`Connect`] request.
 #[derive(Debug)]
 pub struct ConnectTakeAddrsIter {
     inner: Either<Option<SocketAddr>, vec_deque::IntoIter<SocketAddr>>,

actix-tls/src/connect/connector.rs

@@ -9,6 +9,7 @@ use std::task::{Context, Poll};
 use actix_rt::net::TcpStream;
 use actix_service::{Service, ServiceFactory};
 use futures_util::future::{err, ok, BoxFuture, Either, FutureExt, Ready};
+use log::{error, trace};
 
 use super::connect::{Address, Connect, Connection};
 use super::error::ConnectError;
@@ -40,8 +41,7 @@ impl<T> Clone for TcpConnectorFactory<T> {
     }
 }
 
-impl<T: Address> ServiceFactory for TcpConnectorFactory<T> {
-    type Request = Connect<T>;
+impl<T: Address> ServiceFactory<Connect<T>> for TcpConnectorFactory<T> {
     type Response = Connection<T, TcpStream>;
     type Error = ConnectError;
     type Config = ();
@@ -70,16 +70,13 @@ impl<T> Clone for TcpConnector<T> {
     }
 }
 
-impl<T: Address> Service for TcpConnector<T> {
-    type Request = Connect<T>;
+impl<T: Address> Service<Connect<T>> for TcpConnector<T> {
     type Response = Connection<T, TcpStream>;
     type Error = ConnectError;
     #[allow(clippy::type_complexity)]
     type Future = Either<TcpConnectorResponse<T>, Ready<Result<Self::Response, Self::Error>>>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, req: Connect<T>) -> Self::Future {
         let port = req.port();

actix-tls/src/connect/mod.rs

@@ -5,20 +5,12 @@
 //! * `openssl` - enables TLS support via `openssl` crate
 //! * `rustls` - enables TLS support via `rustls` crate
 
-#![deny(rust_2018_idioms)]
-#![recursion_limit = "128"]
-
-#[macro_use]
-extern crate log;
-
 mod connect;
 mod connector;
 mod error;
 mod resolve;
 mod service;
 pub mod ssl;
-
-#[cfg(feature = "uri")]
 mod uri;
 
 use actix_rt::{net::TcpStream, Arbiter};
@@ -74,8 +66,8 @@ pub async fn start_default_resolver() -> Result<AsyncResolver, ConnectError> {
 /// Create TCP connector service.
 pub fn new_connector<T: Address + 'static>(
     resolver: AsyncResolver,
-) -> impl Service<Request = Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError>
-       + Clone {
+) -> impl Service<Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError> + Clone
+{
     pipeline(Resolver::new(resolver)).and_then(TcpConnector::new())
 }
 
@@ -83,8 +75,8 @@ pub fn new_connector<T: Address + 'static>(
 pub fn new_connector_factory<T: Address + 'static>(
     resolver: AsyncResolver,
 ) -> impl ServiceFactory<
+    Connect<T>,
     Config = (),
-    Request = Connect<T>,
     Response = Connection<T, TcpStream>,
     Error = ConnectError,
     InitError = (),
@@ -94,15 +86,15 @@ pub fn new_connector_factory<T: Address + 'static>(
 
 /// Create connector service with default parameters.
 pub fn default_connector<T: Address + 'static>(
-) -> impl Service<Request = Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError>
-       + Clone {
+) -> impl Service<Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError> + Clone
+{
     pipeline(Resolver::default()).and_then(TcpConnector::new())
 }
 
 /// Create connector service factory with default parameters.
 pub fn default_connector_factory<T: Address + 'static>() -> impl ServiceFactory<
+    Connect<T>,
     Config = (),
-    Request = Connect<T>,
     Response = Connection<T, TcpStream>,
     Error = ConnectError,
     InitError = (),

actix-tls/src/connect/resolve.rs

@@ -6,12 +6,13 @@ use std::task::{Context, Poll};
 
 use actix_service::{Service, ServiceFactory};
 use futures_util::future::{ok, Either, Ready};
+use log::trace;
 use trust_dns_resolver::TokioAsyncResolver as AsyncResolver;
 use trust_dns_resolver::{error::ResolveError, lookup_ip::LookupIp};
 
-use crate::connect::{Address, Connect};
-use crate::error::ConnectError;
-use crate::get_default_resolver;
+use super::connect::{Address, Connect};
+use super::error::ConnectError;
+use super::get_default_resolver;
 
 /// DNS Resolver Service factory
 pub struct ResolverFactory<T> {
@@ -54,8 +55,7 @@ impl<T> Clone for ResolverFactory<T> {
     }
 }
 
-impl<T: Address> ServiceFactory for ResolverFactory<T> {
-    type Request = Connect<T>;
+impl<T: Address> ServiceFactory<Connect<T>> for ResolverFactory<T> {
     type Response = Connect<T>;
     type Error = ConnectError;
     type Config = ();
@@ -102,8 +102,7 @@ impl<T> Clone for Resolver<T> {
     }
 }
 
-impl<T: Address> Service for Resolver<T> {
-    type Request = Connect<T>;
+impl<T: Address> Service<Connect<T>> for Resolver<T> {
     type Response = Connect<T>;
     type Error = ConnectError;
     #[allow(clippy::type_complexity)]
@@ -112,9 +111,7 @@ impl<T: Address> Service for Resolver<T> {
         Ready<Result<Connect<T>, Self::Error>>,
     >;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, mut req: Connect<T>) -> Self::Future {
         if req.addr.is_some() {

actix-tls/src/connect/service.rs

@@ -8,10 +8,10 @@ use either::Either;
 use futures_util::future::{ok, Ready};
 use trust_dns_resolver::TokioAsyncResolver as AsyncResolver;
 
-use crate::connect::{Address, Connect, Connection};
-use crate::connector::{TcpConnector, TcpConnectorFactory};
-use crate::error::ConnectError;
-use crate::resolve::{Resolver, ResolverFactory};
+use super::connect::{Address, Connect, Connection};
+use super::connector::{TcpConnector, TcpConnectorFactory};
+use super::error::ConnectError;
+use super::resolve::{Resolver, ResolverFactory};
 
 pub struct ConnectServiceFactory<T> {
     tcp: TcpConnectorFactory<T>,
@@ -70,8 +70,7 @@ impl<T> Clone for ConnectServiceFactory<T> {
     }
 }
 
-impl<T: Address> ServiceFactory for ConnectServiceFactory<T> {
-    type Request = Connect<T>;
+impl<T: Address> ServiceFactory<Connect<T>> for ConnectServiceFactory<T> {
     type Response = Connection<T, TcpStream>;
     type Error = ConnectError;
     type Config = ();
@@ -90,15 +89,12 @@ pub struct ConnectService<T> {
     resolver: Resolver<T>,
 }
 
-impl<T: Address> Service for ConnectService<T> {
-    type Request = Connect<T>;
+impl<T: Address> Service<Connect<T>> for ConnectService<T> {
     type Response = Connection<T, TcpStream>;
     type Error = ConnectError;
     type Future = ConnectServiceResponse<T>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, req: Connect<T>) -> Self::Future {
         ConnectServiceResponse {
@@ -109,8 +105,8 @@ impl<T: Address> Service for ConnectService<T> {
 }
 
 enum ConnectState<T: Address> {
-    Resolve(<Resolver<T> as Service>::Future),
-    Connect(<TcpConnector<T> as Service>::Future),
+    Resolve(<Resolver<T> as Service<Connect<T>>>::Future),
+    Connect(<TcpConnector<T> as Service<Connect<T>>>::Future),
 }
 
 impl<T: Address> ConnectState<T> {
@@ -160,15 +156,12 @@ pub struct TcpConnectService<T> {
     resolver: Resolver<T>,
 }
 
-impl<T: Address + 'static> Service for TcpConnectService<T> {
-    type Request = Connect<T>;
+impl<T: Address + 'static> Service<Connect<T>> for TcpConnectService<T> {
     type Response = TcpStream;
     type Error = ConnectError;
     type Future = TcpConnectServiceResponse<T>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, req: Connect<T>) -> Self::Future {
         TcpConnectServiceResponse {
@@ -179,8 +172,8 @@ impl<T: Address + 'static> Service for TcpConnectService<T> {
 }
 
 enum TcpConnectState<T: Address> {
-    Resolve(<Resolver<T> as Service>::Future),
-    Connect(<TcpConnector<T> as Service>::Future),
+    Resolve(<Resolver<T> as Service<Connect<T>>>::Future),
+    Connect(<TcpConnector<T> as Service<Connect<T>>>::Future),
 }
 
 impl<T: Address> TcpConnectState<T> {

actix-tls/src/connect/ssl/openssl.rs

@@ -4,16 +4,19 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 use std::{fmt, io};
 
-pub use open_ssl::ssl::{Error as SslError, SslConnector, SslMethod};
-pub use tokio_openssl::{HandshakeError, SslStream};
-
 use actix_codec::{AsyncRead, AsyncWrite};
 use actix_rt::net::TcpStream;
 use actix_service::{Service, ServiceFactory};
-use futures_util::future::{err, ok, Either, FutureExt, LocalBoxFuture, Ready};
+use futures_util::{
+    future::{err, ok, Either, Ready},
+    ready,
+};
+use log::trace;
+pub use openssl::ssl::{Error as SslError, HandshakeError, SslConnector, SslMethod};
+pub use tokio_openssl::SslStream;
 use trust_dns_resolver::TokioAsyncResolver as AsyncResolver;
 
-use crate::{
+use crate::connect::{
     Address, Connect, ConnectError, ConnectService, ConnectServiceFactory, Connection,
 };
 
@@ -54,12 +57,11 @@ impl<T, U> Clone for OpensslConnector<T, U> {
     }
 }
 
-impl<T, U> ServiceFactory for OpensslConnector<T, U>
+impl<T, U> ServiceFactory<Connection<T, U>> for OpensslConnector<T, U>
 where
     T: Address + 'static,
     U: AsyncRead + AsyncWrite + Unpin + fmt::Debug + 'static,
 {
-    type Request = Connection<T, U>;
     type Response = Connection<T, SslStream<U>>;
     type Error = io::Error;
     type Config = ();
@@ -89,20 +91,17 @@ impl<T, U> Clone for OpensslConnectorService<T, U> {
     }
 }
 
-impl<T, U> Service for OpensslConnectorService<T, U>
+impl<T, U> Service<Connection<T, U>> for OpensslConnectorService<T, U>
 where
     T: Address + 'static,
     U: AsyncRead + AsyncWrite + Unpin + fmt::Debug + 'static,
 {
-    type Request = Connection<T, U>;
     type Response = Connection<T, SslStream<U>>;
     type Error = io::Error;
     #[allow(clippy::type_complexity)]
     type Future = Either<ConnectAsyncExt<T, U>, Ready<Result<Self::Response, Self::Error>>>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, stream: Connection<T, U>) -> Self::Future {
         trace!("SSL Handshake start for: {:?}", stream.host());
@@ -111,18 +110,23 @@ where
 
         match self.connector.configure() {
             Err(e) => Either::Right(err(io::Error::new(io::ErrorKind::Other, e))),
-            Ok(config) => Either::Left(ConnectAsyncExt {
-                fut: async move { tokio_openssl::connect(config, &host, io).await }
-                    .boxed_local(),
-                stream: Some(stream),
-                _t: PhantomData,
-            }),
+            Ok(config) => {
+                let ssl = config
+                    .into_ssl(&host)
+                    .expect("SSL connect configuration was invalid.");
+
+                Either::Left(ConnectAsyncExt {
+                    io: Some(SslStream::new(ssl, io).unwrap()),
+                    stream: Some(stream),
+                    _t: PhantomData,
+                })
+            }
         }
     }
 }
 
 pub struct ConnectAsyncExt<T, U> {
-    fut: LocalBoxFuture<'static, Result<SslStream<U>, HandshakeError<U>>>,
+    io: Option<SslStream<U>>,
     stream: Option<Connection<T, ()>>,
     _t: PhantomData<U>,
 }
@@ -136,17 +140,16 @@ where
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.get_mut();
 
-        match Pin::new(&mut this.fut).poll(cx) {
-            Poll::Ready(Ok(stream)) => {
-                let s = this.stream.take().unwrap();
-                trace!("SSL Handshake success: {:?}", s.host());
-                Poll::Ready(Ok(s.replace(stream).1))
+        match ready!(Pin::new(this.io.as_mut().unwrap()).poll_connect(cx)) {
+            Ok(_) => {
+                let stream = this.stream.take().unwrap();
+                trace!("SSL Handshake success: {:?}", stream.host());
+                Poll::Ready(Ok(stream.replace(this.io.take().unwrap()).1))
             }
-            Poll::Ready(Err(e)) => {
+            Err(e) => {
                 trace!("SSL Handshake error: {:?}", e);
                 Poll::Ready(Err(io::Error::new(io::ErrorKind::Other, format!("{}", e))))
             }
-            Poll::Pending => Poll::Pending,
         }
     }
 }
@@ -194,8 +197,7 @@ impl<T> Clone for OpensslConnectServiceFactory<T> {
     }
 }
 
-impl<T: Address + 'static> ServiceFactory for OpensslConnectServiceFactory<T> {
-    type Request = Connect<T>;
+impl<T: Address + 'static> ServiceFactory<Connect<T>> for OpensslConnectServiceFactory<T> {
     type Response = SslStream<TcpStream>;
     type Error = ConnectError;
     type Config = ();
@@ -214,15 +216,12 @@ pub struct OpensslConnectService<T> {
     openssl: OpensslConnectorService<T, TcpStream>,
 }
 
-impl<T: Address + 'static> Service for OpensslConnectService<T> {
-    type Request = Connect<T>;
+impl<T: Address + 'static> Service<Connect<T>> for OpensslConnectService<T> {
     type Response = SslStream<TcpStream>;
     type Error = ConnectError;
     type Future = OpensslConnectServiceResponse<T>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, req: Connect<T>) -> Self::Future {
         OpensslConnectServiceResponse {
@@ -234,8 +233,10 @@ impl<T: Address + 'static> Service for OpensslConnectService<T> {
 }
 
 pub struct OpensslConnectServiceResponse<T: Address + 'static> {
-    fut1: Option<<ConnectService<T> as Service>::Future>,
-    fut2: Option<<OpensslConnectorService<T, TcpStream> as Service>::Future>,
+    fut1: Option<<ConnectService<T> as Service<Connect<T>>>::Future>,
+    fut2: Option<
+        <OpensslConnectorService<T, TcpStream> as Service<Connection<T, TcpStream>>>::Future,
+    >,
     openssl: OpensslConnectorService<T, TcpStream>,
 }
 
@@ -244,7 +245,7 @@ impl<T: Address> Future for OpensslConnectServiceResponse<T> {
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         if let Some(ref mut fut) = self.fut1 {
-            match futures_util::ready!(Pin::new(fut).poll(cx)) {
+            match ready!(Pin::new(fut).poll(cx)) {
                 Ok(res) => {
                     let _ = self.fut1.take();
                     self.fut2 = Some(self.openssl.call(res));
@@ -254,7 +255,7 @@ impl<T: Address> Future for OpensslConnectServiceResponse<T> {
         }
 
         if let Some(ref mut fut) = self.fut2 {
-            match futures_util::ready!(Pin::new(fut).poll(cx)) {
+            match ready!(Pin::new(fut).poll(cx)) {
                 Ok(connect) => Poll::Ready(Ok(connect.into_parts().0)),
                 Err(e) => Poll::Ready(Err(ConnectError::Io(io::Error::new(
                     io::ErrorKind::Other,

actix-tls/src/connect/ssl/rustls.rs

@@ -5,16 +5,17 @@ use std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
 
-pub use rust_tls::Session;
+pub use rustls::Session;
 pub use tokio_rustls::{client::TlsStream, rustls::ClientConfig};
 
 use actix_codec::{AsyncRead, AsyncWrite};
 use actix_service::{Service, ServiceFactory};
 use futures_util::future::{ok, Ready};
+use log::trace;
 use tokio_rustls::{Connect, TlsConnector};
 use webpki::DNSNameRef;
 
-use crate::{Address, Connection};
+use crate::connect::{Address, Connection};
 
 /// Rustls connector factory
 pub struct RustlsConnector<T, U> {
@@ -53,11 +54,10 @@ impl<T, U> Clone for RustlsConnector<T, U> {
     }
 }
 
-impl<T: Address, U> ServiceFactory for RustlsConnector<T, U>
+impl<T: Address, U> ServiceFactory<Connection<T, U>> for RustlsConnector<T, U>
 where
     U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
 {
-    type Request = Connection<T, U>;
     type Response = Connection<T, TlsStream<U>>;
     type Error = std::io::Error;
     type Config = ();
@@ -87,18 +87,15 @@ impl<T, U> Clone for RustlsConnectorService<T, U> {
     }
 }
 
-impl<T: Address, U> Service for RustlsConnectorService<T, U>
+impl<T: Address, U> Service<Connection<T, U>> for RustlsConnectorService<T, U>
 where
     U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
 {
-    type Request = Connection<T, U>;
     type Response = Connection<T, TlsStream<U>>;
     type Error = std::io::Error;
     type Future = ConnectAsyncExt<T, U>;
 
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
+    actix_service::always_ready!();
 
     fn call(&mut self, stream: Connection<T, U>) -> Self::Future {
         trace!("SSL Handshake start for: {:?}", stream.host());

actix-tls/src/connect/uri.rs

@@ -1,6 +1,6 @@
 use http::Uri;
 
-use crate::Address;
+use super::Address;
 
 impl Address for Uri {
     fn host(&self) -> &str {

actix-tls/src/lib.rs

@@ -1,44 +1,17 @@
-//! TLS acceptor services for Actix ecosystem.
-//!
-//! ## Crate Features
-//! * `openssl` - TLS acceptor using the `openssl` crate.
-//! * `rustls` - TLS acceptor using the `rustls` crate.
-//! * `nativetls` - TLS acceptor using the `native-tls` crate.
+//! TLS acceptor and connector services for Actix ecosystem
 
-#![deny(rust_2018_idioms)]
-
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-use actix_utils::counter::Counter;
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
+#[cfg(feature = "native-tls")]
+extern crate tls_native_tls as native_tls;
 #[cfg(feature = "openssl")]
-pub mod openssl;
-
+extern crate tls_openssl as openssl;
 #[cfg(feature = "rustls")]
-pub mod rustls;
+extern crate tls_rustls as rustls;
 
-#[cfg(feature = "nativetls")]
-pub mod nativetls;
-
-pub(crate) static MAX_CONN: AtomicUsize = AtomicUsize::new(256);
-
-thread_local! {
-    static MAX_CONN_COUNTER: Counter = Counter::new(MAX_CONN.load(Ordering::Relaxed));
-}
-
-/// Sets the maximum per-worker concurrent TLS connection limit.
-///
-/// All listeners will stop accepting connections when this limit is reached.
-/// It can be used to regulate the global TLS CPU usage.
-///
-/// By default, the connection limit is 256.
-pub fn max_concurrent_tls_connect(num: usize) {
-    MAX_CONN.store(num, Ordering::Relaxed);
-}
-
-/// TLS error combined with service error.
-#[derive(Debug)]
-pub enum TlsError<E1, E2> {
-    Tls(E1),
-    Service(E2),
-}
+#[cfg(feature = "accept")]
+pub mod accept;
+#[cfg(feature = "connect")]
+pub mod connect;

actix-tracing/Cargo.toml

@@ -16,11 +16,12 @@ name = "actix_tracing"
 path = "src/lib.rs"
 
 [dependencies]
-actix-service = "1.0.4"
+actix-service = "2.0.0-beta.1"
+
 futures-util = { version = "0.3.4", default-features = false }
 tracing = "0.1"
 tracing-futures = "0.2"
 
 [dev_dependencies]
 actix-rt = "1.0"
-slab = "0.4"
+slab = "0.4"

actix-tracing/src/lib.rs

@@ -1,8 +1,10 @@
 //! Actix tracing - support for tokio tracing with Actix services.
-#![deny(rust_2018_idioms, warnings)]
 
-use std::marker::PhantomData;
-use std::task::{Context, Poll};
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
+use core::marker::PhantomData;
 
 use actix_service::{
     apply, dev::ApplyTransform, IntoServiceFactory, Service, ServiceFactory, Transform,
@@ -24,21 +26,18 @@ impl<S, F> TracingService<S, F> {
     }
 }
 
-impl<S, F> Service for TracingService<S, F>
+impl<S, Req, F> Service<Req> for TracingService<S, F>
 where
-    S: Service,
-    F: Fn(&S::Request) -> Option<tracing::Span>,
+    S: Service<Req>,
+    F: Fn(&Req) -> Option<tracing::Span>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Future = Either<S::Future, Instrumented<S::Future>>;
 
-    fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.inner.poll_ready(ctx)
-    }
+    actix_service::forward_ready!(inner);
 
-    fn call(&mut self, req: Self::Request) -> Self::Future {
+    fn call(&mut self, req: Req) -> Self::Future {
         let span = (self.make_span)(&req);
         let _enter = span.as_ref().map(|s| s.enter());
 
@@ -57,8 +56,6 @@ where
 }
 
 /// A `Transform` implementation that wraps services with a [`TracingService`].
-///
-/// [`TracingService`]: struct.TracingService.html
 pub struct TracingTransform<S, U, F> {
     make_span: F,
     _p: PhantomData<fn(S, U)>,
@@ -73,18 +70,12 @@ impl<S, U, F> TracingTransform<S, U, F> {
     }
 }
 
-impl<S, U, F> Transform<S> for TracingTransform<S, U, F>
+impl<S, Req, U, F> Transform<S, Req> for TracingTransform<S, U, F>
 where
-    S: Service,
-    U: ServiceFactory<
-        Request = S::Request,
-        Response = S::Response,
-        Error = S::Error,
-        Service = S,
-    >,
-    F: Fn(&S::Request) -> Option<tracing::Span> + Clone,
+    S: Service<Req>,
+    U: ServiceFactory<Req, Response = S::Response, Error = S::Error, Service = S>,
+    F: Fn(&Req) -> Option<tracing::Span> + Clone,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = S::Error;
     type Transform = TracingService<S, F>;
@@ -109,14 +100,14 @@ where
 ///     |req: &Request| Some(span!(Level::INFO, "request", req.id))
 /// );
 /// ```
-pub fn trace<S, U, F>(
-    service_factory: U,
+pub fn trace<S, Req, I, F>(
+    service_factory: I,
     make_span: F,
-) -> ApplyTransform<TracingTransform<S::Service, S, F>, S>
+) -> ApplyTransform<TracingTransform<S::Service, S, F>, S, Req>
 where
-    S: ServiceFactory,
-    F: Fn(&S::Request) -> Option<tracing::Span> + Clone,
-    U: IntoServiceFactory<S>,
+    I: IntoServiceFactory<S, Req>,
+    S: ServiceFactory<Req>,
+    F: Fn(&Req) -> Option<tracing::Span> + Clone,
 {
     apply(
         TracingTransform::new(make_span),

actix-utils/CHANGES.md

@@ -1,223 +1,156 @@
 # Changes
 
 ## Unreleased - 2020-xx-xx
-* Upgrade `pin-project` to `1.0`.
+
+
+## 3.0.0-beta.1 - 2020-12-28
+* Update `bytes` dependency to `1`. [#237]
+* Use `pin-project-lite` to replace `pin-project`. [#229]
+* Remove `condition`,`either`,`inflight`,`keepalive`,`oneshot`,`order`,`stream` and `time` mods. [#229]
+
+[#229]: https://github.com/actix/actix-net/pull/229
+[#237]: https://github.com/actix/actix-net/pull/237
+
 
 ## 2.0.0 - 2020-08-23
 * No changes from beta 1.
 
+
 ## 2.0.0-beta.1 - 2020-08-19
 * Upgrade `tokio-util` to `0.3`.
 * Remove unsound custom Cell and use `std::cell::RefCell` instead, as well as `actix-service`.
 * Rename method to correctly spelled `LocalWaker::is_registered`.
 
-## [1.0.6] - 2020-01-08
 
-* Add `Clone` impl for `condition::Waiter`
+## 1.0.6 - 2020-01-08
+* Add `Clone` impl for `condition::Waiter`.
 
-## [1.0.5] - 2020-01-08
 
+## 1.0.5 - 2020-01-08
 * Add `Condition` type.
-
 * Add `Pool` of one-shot's.
 
-## [1.0.4] - 2019-12-20
 
+## 1.0.4 - 2019-12-20
 * Add methods to check `LocalWaker` registration state.
 
-## [1.0.3] - 2019-12-11
 
+## 1.0.3 - 2019-12-11
 * Revert InOrder service changes
 
-## [1.0.2] - 2019-12-11
 
-* Allow to create `framed::Dispatcher` with custom `mpsc::Receiver`
+## 1.0.2 - 2019-12-11
+* Allow to create `framed::Dispatcher` with custom `mpsc::Receiver`.
+* Add `oneshot::Sender::is_canceled()` method.
 
-* Add `oneshot::Sender::is_canceled()` method
 
-## [1.0.1] - 2019-12-11
+## 1.0.1 - 2019-12-11
+* Optimize InOrder service.
 
-* Optimize InOrder service
 
-## [1.0.0] - 2019-12-11
+## 1.0.0 - 2019-12-11
+* Simplify oneshot and mpsc implementations.
 
-* Simplify oneshot and mpsc implementations
 
-## [1.0.0-alpha.3] - 2019-12-07
+## 1.0.0-alpha.3 - 2019-12-07
+* Migrate to tokio 0.2.
+* Fix oneshot.
 
-* Migrate to tokio 0.2
 
-* Fix oneshot
+## 1.0.0-alpha.2 - 2019-12-02
+* Migrate to `std::future`.
 
-## [1.0.0-alpha.2] - 2019-12-02
-
-* Migrate to `std::future`
-
-## [0.4.7] - 2019-10-14
 
+## 0.4.7 - 2019-10-14
 * Re-register task on every framed transport poll.
 
 
-## [0.4.6] - 2019-10-08
-
+## 0.4.6 - 2019-10-08
 * Refactor `Counter` type. register current task in available method.
 
 
-## [0.4.5] - 2019-07-19
-
-### Removed
-
-* Deprecated `CloneableService` as it is not safe
+## 0.4.5 - 2019-07-19
+* Deprecated `CloneableService` as it is not safe.
 
 
-## [0.4.4] - 2019-07-17
-
-### Changed
-
-* Undeprecate `FramedTransport` as it is actually useful
+## 0.4.4 - 2019-07-17
+* Undeprecate `FramedTransport` as it is actually useful.
 
 
-## [0.4.3] - 2019-07-17
-
-### Deprecated
-
-* Deprecate `CloneableService` as it is not safe and in general not very useful
-
-* Deprecate `FramedTransport` in favor of `actix-ioframe`
+## 0.4.3 - 2019-07-17
+* Deprecate `CloneableService` as it is not safe and in general not very useful.
+* Deprecate `FramedTransport` in favor of `actix-ioframe`.
 
 
-## [0.4.2] - 2019-06-26
-
-### Fixed
-
-* Do not block on sink drop for FramedTransport
+## 0.4.2 - 2019-06-26
+* Do not block on sink drop for FramedTransport.
 
 
-## [0.4.1] - 2019-05-15
-
-### Changed
-
-* Change `Either` constructor
+## 0.4.1 - 2019-05-15
+* Change `Either` constructor.
 
 
-## [0.4.0] - 2019-05-11
+## 0.4.0 - 2019-05-11
+* Change `Either` to handle two nexted services.
+* Upgrade actix-service 0.4.
+* Removed framed related services.
+* Removed stream related services.
 
-### Changed
-
-* Change `Either` to handle two nexted services
-
-* Upgrade actix-service 0.4
-
-### Deleted
-
-* Framed related services
-
-* Stream related services
-
-## [0.3.5] - 2019-04-04
-
-### Added
 
+## 0.3.5 - 2019-04-04
 * Allow to send messages to `FramedTransport` via mpsc channel.
-
-### Changed
-
-* Remove 'static constraint from Clonable service
+* Remove `'static` constraint from Clonable service.
 
 
-## [0.3.4] - 2019-03-12
-
-### Changed
-
+## 0.3.4 - 2019-03-12
 * `TimeoutService`, `InOrderService`, `InFlightService` accepts generic IntoService services.
-
-### Fixed
-
-* Fix `InFlightService::poll_ready()` nested service readiness check
-
-* Fix `InOrderService::poll_ready()` nested service readiness check
+* Fix `InFlightService::poll_ready()` nested service readiness check.
+* Fix `InOrderService::poll_ready()` nested service readiness check.
 
 
-## [0.3.3] - 2019-03-09
-
-### Changed
-
-* Revert IntoFuture change
-
-* Add generic config param for IntoFramed and TakeOne new services
+## 0.3.3 - 2019-03-09
+* Revert IntoFuture change.
+* Add generic config param for IntoFramed and TakeOne new services.
 
 
-## [0.3.2] - 2019-03-04
+## 0.3.2 - 2019-03-04
+* Use IntoFuture for new services.
 
-### Changed
-
-* Use IntoFuture for new services
+## 0.3.1 - 2019-03-04
+* Use new type of transform trait.
 
 
-## [0.3.1] - 2019-03-04
-
-### Changed
-
-* Use new type of transform trait
-
-
-## [0.3.0] - 2019-03-02
-
-### Changed
-
+## 0.3.0 - 2019-03-02
 * Use new `NewService` trait
-
 * BoxedNewService` and `BoxedService` types moved to actix-service crate.
 
 
-## [0.2.4] - 2019-02-21
-
-### Changed
-
+## 0.2.4 - 2019-02-21
 * Custom `BoxedNewService` implementation.
 
 
-## [0.2.3] - 2019-02-21
-
-### Added
-
-* Add `BoxedNewService` and `BoxedService`
+## 0.2.3 - 2019-02-21
+* Add `BoxedNewService` and `BoxedService`.
 
 
-## [0.2.2] - 2019-02-11
-
-### Added
-
-* Add `Display` impl for `TimeoutError`
-
-* Add `Display` impl for `InOrderError`
+## 0.2.2 - 2019-02-11
+* Add `Display` impl for `TimeoutError`.
+* Add `Display` impl for `InOrderError`.
 
 
-## [0.2.1] - 2019-02-06
-
-### Added
-
+## 0.2.1 - 2019-02-06
 * Add `InOrder` service. the service yields responses as they become available,
   in the order that their originating requests were submitted to the service.
-
-### Changed
-
-* Convert `Timeout` and `InFlight` services to a transforms
+* Convert `Timeout` and `InFlight` services to a transforms.
 
 
-## [0.2.0] - 2019-02-01
-
-* Fix framed transport error handling
-
-* Added Clone impl for Either service
-
-* Added Clone impl for Timeout service factory
-
-* Added Service and NewService for Stream dispatcher
-
-* Switch to actix-service 0.2
+## 0.2.0 - 2019-02-01
+* Fix framed transport error handling.
+* Added Clone impl for Either service.
+* Added Clone impl for Timeout service factory.
+* Added Service and NewService for Stream dispatcher.
+* Switch to actix-service 0.2.
 
 
-## [0.1.0] - 2018-12-09
-
-* Move utils services to separate crate
+## 0.1.0 - 2018-12-09
+* Move utils services to separate crate.

actix-utils/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "actix-utils"
-version = "2.0.0"
+version = "3.0.0-beta.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "Various network related services and utilities for the Actix ecosystem."
+description = "Various network related services and utilities for the Actix ecosystem"
 keywords = ["network", "framework", "async", "futures"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
@@ -16,15 +16,14 @@ name = "actix_utils"
 path = "src/lib.rs"
 
 [dependencies]
-actix-codec = "0.3.0"
-actix-rt = "1.1.1"
-actix-service = "1.0.6"
-bitflags = "1.2.1"
-bytes = "0.5.3"
-either = "1.5.3"
-futures-channel = { version = "0.3.4", default-features = false }
-futures-sink = { version = "0.3.4", default-features = false }
-futures-util = { version = "0.3.4", default-features = false }
+actix-codec = "0.4.0-beta.1"
+actix-rt = "2.0.0-beta.1"
+actix-service = "2.0.0-beta.1"
+
+futures-core = { version = "0.3.7", default-features = false }
+futures-sink = { version = "0.3.7", default-features = false }
 log = "0.4"
-pin-project = "1.0.0"
-slab = "0.4"
+pin-project-lite = "0.2.0"
+
+[dev-dependencies]
+futures-util = { version = "0.3.7", default-features = false }

actix-utils/src/condition.rs

@@ -1,129 +0,0 @@
-use std::cell::RefCell;
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-use slab::Slab;
-
-use crate::task::LocalWaker;
-
-/// Condition allows to notify multiple receivers at the same time
-pub struct Condition(Rc<RefCell<Inner>>);
-
-struct Inner {
-    data: Slab<Option<LocalWaker>>,
-}
-
-impl Default for Condition {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl Condition {
-    pub fn new() -> Condition {
-        Condition(Rc::new(RefCell::new(Inner { data: Slab::new() })))
-    }
-
-    /// Get condition waiter
-    pub fn wait(&mut self) -> Waiter {
-        let token = self.0.borrow_mut().data.insert(None);
-        Waiter {
-            token,
-            inner: self.0.clone(),
-        }
-    }
-
-    /// Notify all waiters
-    pub fn notify(&self) {
-        let inner = self.0.borrow();
-        for item in inner.data.iter() {
-            if let Some(waker) = item.1 {
-                waker.wake();
-            }
-        }
-    }
-}
-
-impl Drop for Condition {
-    fn drop(&mut self) {
-        self.notify()
-    }
-}
-
-#[must_use = "Waiter do nothing unless polled"]
-pub struct Waiter {
-    token: usize,
-    inner: Rc<RefCell<Inner>>,
-}
-
-impl Clone for Waiter {
-    fn clone(&self) -> Self {
-        let token = self.inner.borrow_mut().data.insert(None);
-        Waiter {
-            token,
-            inner: self.inner.clone(),
-        }
-    }
-}
-
-impl Future for Waiter {
-    type Output = ();
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
-
-        let mut inner = this.inner.borrow_mut();
-        let inner = unsafe { inner.data.get_unchecked_mut(this.token) };
-        if inner.is_none() {
-            let waker = LocalWaker::default();
-            waker.register(cx.waker());
-            *inner = Some(waker);
-            Poll::Pending
-        } else if inner.as_mut().unwrap().register(cx.waker()) {
-            Poll::Pending
-        } else {
-            Poll::Ready(())
-        }
-    }
-}
-
-impl Drop for Waiter {
-    fn drop(&mut self) {
-        self.inner.borrow_mut().data.remove(self.token);
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use futures_util::future::lazy;
-
-    #[actix_rt::test]
-    async fn test_condition() {
-        let mut cond = Condition::new();
-        let mut waiter = cond.wait();
-        assert_eq!(
-            lazy(|cx| Pin::new(&mut waiter).poll(cx)).await,
-            Poll::Pending
-        );
-        cond.notify();
-        waiter.await;
-
-        let mut waiter = cond.wait();
-        assert_eq!(
-            lazy(|cx| Pin::new(&mut waiter).poll(cx)).await,
-            Poll::Pending
-        );
-        let mut waiter2 = waiter.clone();
-        assert_eq!(
-            lazy(|cx| Pin::new(&mut waiter2).poll(cx)).await,
-            Poll::Pending
-        );
-
-        drop(cond);
-        waiter.await;
-        waiter2.await;
-    }
-}

actix-utils/src/counter.rs

@@ -1,6 +1,7 @@
-use std::cell::Cell;
+use core::cell::Cell;
+use core::task;
+
 use std::rc::Rc;
-use std::task;
 
 use crate::task::LocalWaker;
 

actix-utils/src/dispatcher.rs

@@ -1,15 +1,17 @@
-//! Framed dispatcher service and related utilities
+//! Framed dispatcher service and related utilities.
 
 #![allow(type_alias_bounds)]
 
-use std::pin::Pin;
-use std::task::{Context, Poll};
-use std::{fmt, mem};
+use core::future::Future;
+use core::pin::Pin;
+use core::task::{Context, Poll};
+use core::{fmt, mem};
 
 use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
 use actix_service::{IntoService, Service};
-use futures_util::{future::Future, stream::Stream, FutureExt};
+use futures_core::stream::Stream;
 use log::debug;
+use pin_project_lite::pin_project;
 
 use crate::mpsc;
 
@@ -61,28 +63,35 @@ pub enum Message<T> {
     Close,
 }
 
-/// Dispatcher is a future that reads frames from Framed object
-/// and passes them to the service.
-#[pin_project::pin_project]
-pub struct Dispatcher<S, T, U, I>
-where
-    S: Service<Request = <U as Decoder>::Item, Response = I>,
-    S::Error: 'static,
-    S::Future: 'static,
-    T: AsyncRead + AsyncWrite,
-    U: Encoder<I> + Decoder,
-    I: 'static,
-    <U as Encoder<I>>::Error: std::fmt::Debug,
-{
-    service: S,
-    state: State<S, U, I>,
-    #[pin]
-    framed: Framed<T, U>,
-    rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
-    tx: mpsc::Sender<Result<Message<I>, S::Error>>,
+pin_project! {
+    /// Dispatcher is a future that reads frames from Framed object
+    /// and passes them to the service.
+    pub struct Dispatcher<S, T, U, I>
+    where
+        S: Service<<U as Decoder>::Item, Response = I>,
+        S::Error: 'static,
+        S::Future: 'static,
+        T: AsyncRead,
+        T: AsyncWrite,
+        U: Encoder<I>,
+        U: Decoder,
+        I: 'static,
+        <U as Encoder<I>>::Error: fmt::Debug,
+    {
+        service: S,
+        state: State<S, U, I>,
+        #[pin]
+        framed: Framed<T, U>,
+        rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
+        tx: mpsc::Sender<Result<Message<I>, S::Error>>,
+    }
 }
 
-enum State<S: Service, U: Encoder<I> + Decoder, I> {
+enum State<S, U, I>
+where
+    S: Service<<U as Decoder>::Item>,
+    U: Encoder<I> + Decoder,
+{
     Processing,
     Error(DispatcherError<S::Error, U, I>),
     FramedError(DispatcherError<S::Error, U, I>),
@@ -90,7 +99,11 @@ enum State<S: Service, U: Encoder<I> + Decoder, I> {
     Stopping,
 }
 
-impl<S: Service, U: Encoder<I> + Decoder, I> State<S, U, I> {
+impl<S, U, I> State<S, U, I>
+where
+    S: Service<<U as Decoder>::Item>,
+    U: Encoder<I> + Decoder,
+{
     fn take_error(&mut self) -> DispatcherError<S::Error, U, I> {
         match mem::replace(self, State::Processing) {
             State::Error(err) => err,
@@ -108,16 +121,19 @@ impl<S: Service, U: Encoder<I> + Decoder, I> State<S, U, I> {
 
 impl<S, T, U, I> Dispatcher<S, T, U, I>
 where
-    S: Service<Request = <U as Decoder>::Item, Response = I>,
+    S: Service<<U as Decoder>::Item, Response = I>,
     S::Error: 'static,
     S::Future: 'static,
     T: AsyncRead + AsyncWrite,
     U: Decoder + Encoder<I>,
     I: 'static,
-    <U as Decoder>::Error: std::fmt::Debug,
-    <U as Encoder<I>>::Error: std::fmt::Debug,
+    <U as Decoder>::Error: fmt::Debug,
+    <U as Encoder<I>>::Error: fmt::Debug,
 {
-    pub fn new<F: IntoService<S>>(framed: Framed<T, U>, service: F) -> Self {
+    pub fn new<F>(framed: Framed<T, U>, service: F) -> Self
+    where
+        F: IntoService<S, <U as Decoder>::Item>,
+    {
         let (tx, rx) = mpsc::channel();
         Dispatcher {
             framed,
@@ -129,11 +145,14 @@ where
     }
 
     /// Construct new `Dispatcher` instance with customer `mpsc::Receiver`
-    pub fn with_rx<F: IntoService<S>>(
+    pub fn with_rx<F>(
         framed: Framed<T, U>,
         service: F,
         rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
-    ) -> Self {
+    ) -> Self
+    where
+        F: IntoService<S, <U as Decoder>::Item>,
+    {
         let tx = rx.sender();
         Dispatcher {
             framed,
@@ -172,13 +191,13 @@ where
 
     fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool
     where
-        S: Service<Request = <U as Decoder>::Item, Response = I>,
+        S: Service<<U as Decoder>::Item, Response = I>,
         S::Error: 'static,
         S::Future: 'static,
         T: AsyncRead + AsyncWrite,
         U: Decoder + Encoder<I>,
         I: 'static,
-        <U as Encoder<I>>::Error: std::fmt::Debug,
+        <U as Encoder<I>>::Error: fmt::Debug,
     {
         loop {
             let this = self.as_mut().project();
@@ -198,9 +217,11 @@ where
                     };
 
                     let tx = this.tx.clone();
-                    actix_rt::spawn(this.service.call(item).map(move |item| {
+                    let fut = this.service.call(item);
+                    actix_rt::spawn(async move {
+                        let item = fut.await;
                         let _ = tx.send(item.map(Message::Item));
-                    }));
+                    });
                 }
                 Poll::Pending => return false,
                 Poll::Ready(Err(err)) => {
@@ -214,13 +235,13 @@ where
     /// write to framed object
     fn poll_write(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool
     where
-        S: Service<Request = <U as Decoder>::Item, Response = I>,
+        S: Service<<U as Decoder>::Item, Response = I>,
         S::Error: 'static,
         S::Future: 'static,
         T: AsyncRead + AsyncWrite,
         U: Decoder + Encoder<I>,
         I: 'static,
-        <U as Encoder<I>>::Error: std::fmt::Debug,
+        <U as Encoder<I>>::Error: fmt::Debug,
     {
         loop {
             let mut this = self.as_mut().project();
@@ -265,14 +286,14 @@ where
 
 impl<S, T, U, I> Future for Dispatcher<S, T, U, I>
 where
-    S: Service<Request = <U as Decoder>::Item, Response = I>,
+    S: Service<<U as Decoder>::Item, Response = I>,
     S::Error: 'static,
     S::Future: 'static,
     T: AsyncRead + AsyncWrite,
     U: Decoder + Encoder<I>,
     I: 'static,
-    <U as Encoder<I>>::Error: std::fmt::Debug,
-    <U as Decoder>::Error: std::fmt::Debug,
+    <U as Encoder<I>>::Error: fmt::Debug,
+    <U as Decoder>::Error: fmt::Debug,
 {
     type Output = Result<(), DispatcherError<S::Error, U, I>>;
 
@@ -290,10 +311,8 @@ where
                 }
                 State::Error(_) => {
                     // flush write buffer
-                    if !this.framed.is_write_buf_empty() {
-                        if let Poll::Pending = this.framed.flush(cx) {
-                            return Poll::Pending;
-                        }
+                    if !this.framed.is_write_buf_empty() && this.framed.flush(cx).is_pending() {
+                        return Poll::Pending;
                     }
                     Poll::Ready(Err(this.state.take_error()))
                 }

actix-utils/src/either.rs

@@ -1,153 +0,0 @@
-//! Contains `Either` service and related types and functions.
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use actix_service::{Service, ServiceFactory};
-use futures_util::{future, future::Future, ready};
-
-/// Combine two different service types into a single type.
-///
-/// Both services must be of the same request, response, and error types.
-/// `EitherService` is useful for handling conditional branching in service
-/// middleware to different inner service types.
-pub struct EitherService<A, B> {
-    left: A,
-    right: B,
-}
-
-impl<A: Clone, B: Clone> Clone for EitherService<A, B> {
-    fn clone(&self) -> Self {
-        EitherService {
-            left: self.left.clone(),
-            right: self.right.clone(),
-        }
-    }
-}
-
-impl<A, B> Service for EitherService<A, B>
-where
-    A: Service,
-    B: Service<Response = A::Response, Error = A::Error>,
-{
-    type Request = either::Either<A::Request, B::Request>;
-    type Response = A::Response;
-    type Error = A::Error;
-    type Future = future::Either<A::Future, B::Future>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        let left = self.left.poll_ready(cx)?;
-        let right = self.right.poll_ready(cx)?;
-
-        if left.is_ready() && right.is_ready() {
-            Poll::Ready(Ok(()))
-        } else {
-            Poll::Pending
-        }
-    }
-
-    fn call(&mut self, req: either::Either<A::Request, B::Request>) -> Self::Future {
-        match req {
-            either::Either::Left(req) => future::Either::Left(self.left.call(req)),
-            either::Either::Right(req) => future::Either::Right(self.right.call(req)),
-        }
-    }
-}
-
-/// Combine two different new service types into a single service.
-pub struct Either<A, B> {
-    left: A,
-    right: B,
-}
-
-impl<A, B> Either<A, B> {
-    pub fn new(left: A, right: B) -> Either<A, B>
-    where
-        A: ServiceFactory,
-        A::Config: Clone,
-        B: ServiceFactory<
-            Config = A::Config,
-            Response = A::Response,
-            Error = A::Error,
-            InitError = A::InitError,
-        >,
-    {
-        Either { left, right }
-    }
-}
-
-impl<A, B> ServiceFactory for Either<A, B>
-where
-    A: ServiceFactory,
-    A::Config: Clone,
-    B: ServiceFactory<
-        Config = A::Config,
-        Response = A::Response,
-        Error = A::Error,
-        InitError = A::InitError,
-    >,
-{
-    type Request = either::Either<A::Request, B::Request>;
-    type Response = A::Response;
-    type Error = A::Error;
-    type InitError = A::InitError;
-    type Config = A::Config;
-    type Service = EitherService<A::Service, B::Service>;
-    type Future = EitherNewService<A, B>;
-
-    fn new_service(&self, cfg: A::Config) -> Self::Future {
-        EitherNewService {
-            left: None,
-            right: None,
-            left_fut: self.left.new_service(cfg.clone()),
-            right_fut: self.right.new_service(cfg),
-        }
-    }
-}
-
-impl<A: Clone, B: Clone> Clone for Either<A, B> {
-    fn clone(&self) -> Self {
-        Self {
-            left: self.left.clone(),
-            right: self.right.clone(),
-        }
-    }
-}
-
-#[doc(hidden)]
-#[pin_project::pin_project]
-pub struct EitherNewService<A: ServiceFactory, B: ServiceFactory> {
-    left: Option<A::Service>,
-    right: Option<B::Service>,
-    #[pin]
-    left_fut: A::Future,
-    #[pin]
-    right_fut: B::Future,
-}
-
-impl<A, B> Future for EitherNewService<A, B>
-where
-    A: ServiceFactory,
-    B: ServiceFactory<Response = A::Response, Error = A::Error, InitError = A::InitError>,
-{
-    type Output = Result<EitherService<A::Service, B::Service>, A::InitError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.project();
-
-        if this.left.is_none() {
-            *this.left = Some(ready!(this.left_fut.poll(cx))?);
-        }
-        if this.right.is_none() {
-            *this.right = Some(ready!(this.right_fut.poll(cx))?);
-        }
-
-        if this.left.is_some() && this.right.is_some() {
-            Poll::Ready(Ok(EitherService {
-                left: this.left.take().unwrap(),
-                right: this.right.take().unwrap(),
-            }))
-        } else {
-            Poll::Pending
-        }
-    }
-}

actix-utils/src/inflight.rs

@@ -1,169 +0,0 @@
-use std::convert::Infallible;
-use std::future::Future;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use actix_service::{IntoService, Service, Transform};
-use futures_util::future::{ok, Ready};
-
-use super::counter::{Counter, CounterGuard};
-
-/// InFlight - new service for service that can limit number of in-flight
-/// async requests.
-///
-/// Default number of in-flight requests is 15
-pub struct InFlight {
-    max_inflight: usize,
-}
-
-impl InFlight {
-    pub fn new(max: usize) -> Self {
-        Self { max_inflight: max }
-    }
-}
-
-impl Default for InFlight {
-    fn default() -> Self {
-        Self::new(15)
-    }
-}
-
-impl<S> Transform<S> for InFlight
-where
-    S: Service,
-{
-    type Request = S::Request;
-    type Response = S::Response;
-    type Error = S::Error;
-    type InitError = Infallible;
-    type Transform = InFlightService<S>;
-    type Future = Ready<Result<Self::Transform, Self::InitError>>;
-
-    fn new_transform(&self, service: S) -> Self::Future {
-        ok(InFlightService::new(self.max_inflight, service))
-    }
-}
-
-pub struct InFlightService<S> {
-    count: Counter,
-    service: S,
-}
-
-impl<S> InFlightService<S>
-where
-    S: Service,
-{
-    pub fn new<U>(max: usize, service: U) -> Self
-    where
-        U: IntoService<S>,
-    {
-        Self {
-            count: Counter::new(max),
-            service: service.into_service(),
-        }
-    }
-}
-
-impl<T> Service for InFlightService<T>
-where
-    T: Service,
-{
-    type Request = T::Request;
-    type Response = T::Response;
-    type Error = T::Error;
-    type Future = InFlightServiceResponse<T>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        if let Poll::Pending = self.service.poll_ready(cx)? {
-            Poll::Pending
-        } else if !self.count.available(cx) {
-            log::trace!("InFlight limit exceeded");
-            Poll::Pending
-        } else {
-            Poll::Ready(Ok(()))
-        }
-    }
-
-    fn call(&mut self, req: T::Request) -> Self::Future {
-        InFlightServiceResponse {
-            fut: self.service.call(req),
-            _guard: self.count.get(),
-        }
-    }
-}
-
-#[doc(hidden)]
-#[pin_project::pin_project]
-pub struct InFlightServiceResponse<T: Service> {
-    #[pin]
-    fut: T::Future,
-    _guard: CounterGuard,
-}
-
-impl<T: Service> Future for InFlightServiceResponse<T> {
-    type Output = Result<T::Response, T::Error>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        self.project().fut.poll(cx)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-
-    use std::task::{Context, Poll};
-    use std::time::Duration;
-
-    use super::*;
-    use actix_service::{apply, fn_factory, Service, ServiceFactory};
-    use futures_util::future::{lazy, ok, FutureExt, LocalBoxFuture};
-
-    struct SleepService(Duration);
-
-    impl Service for SleepService {
-        type Request = ();
-        type Response = ();
-        type Error = ();
-        type Future = LocalBoxFuture<'static, Result<(), ()>>;
-
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
-
-        fn call(&mut self, _: ()) -> Self::Future {
-            actix_rt::time::delay_for(self.0)
-                .then(|_| ok::<_, ()>(()))
-                .boxed_local()
-        }
-    }
-
-    #[actix_rt::test]
-    async fn test_transform() {
-        let wait_time = Duration::from_millis(50);
-
-        let mut srv = InFlightService::new(1, SleepService(wait_time));
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
-
-        let res = srv.call(());
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Pending);
-
-        let _ = res.await;
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
-    }
-
-    #[actix_rt::test]
-    async fn test_new_transform() {
-        let wait_time = Duration::from_millis(50);
-
-        let srv = apply(InFlight::new(1), fn_factory(|| ok(SleepService(wait_time))));
-
-        let mut srv = srv.new_service(&()).await.unwrap();
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
-
-        let res = srv.call(());
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Pending);
-
-        let _ = res.await;
-        assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
-    }
-}

actix-utils/src/keepalive.rs

@@ -1,125 +0,0 @@
-use std::convert::Infallible;
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-use std::time::Duration;
-
-use actix_rt::time::{delay_until, Delay, Instant};
-use actix_service::{Service, ServiceFactory};
-use futures_util::future::{ok, Ready};
-
-use super::time::{LowResTime, LowResTimeService};
-
-pub struct KeepAlive<R, E, F> {
-    f: F,
-    ka: Duration,
-    time: LowResTime,
-    _t: PhantomData<(R, E)>,
-}
-
-impl<R, E, F> KeepAlive<R, E, F>
-where
-    F: Fn() -> E + Clone,
-{
-    pub fn new(ka: Duration, time: LowResTime, f: F) -> Self {
-        KeepAlive {
-            f,
-            ka,
-            time,
-            _t: PhantomData,
-        }
-    }
-}
-
-impl<R, E, F> Clone for KeepAlive<R, E, F>
-where
-    F: Clone,
-{
-    fn clone(&self) -> Self {
-        KeepAlive {
-            f: self.f.clone(),
-            ka: self.ka,
-            time: self.time.clone(),
-            _t: PhantomData,
-        }
-    }
-}
-
-impl<R, E, F> ServiceFactory for KeepAlive<R, E, F>
-where
-    F: Fn() -> E + Clone,
-{
-    type Request = R;
-    type Response = R;
-    type Error = E;
-    type InitError = Infallible;
-    type Config = ();
-    type Service = KeepAliveService<R, E, F>;
-    type Future = Ready<Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        ok(KeepAliveService::new(
-            self.ka,
-            self.time.timer(),
-            self.f.clone(),
-        ))
-    }
-}
-
-pub struct KeepAliveService<R, E, F> {
-    f: F,
-    ka: Duration,
-    time: LowResTimeService,
-    delay: Delay,
-    expire: Instant,
-    _t: PhantomData<(R, E)>,
-}
-
-impl<R, E, F> KeepAliveService<R, E, F>
-where
-    F: Fn() -> E,
-{
-    pub fn new(ka: Duration, time: LowResTimeService, f: F) -> Self {
-        let expire = Instant::from_std(time.now() + ka);
-        KeepAliveService {
-            f,
-            ka,
-            time,
-            expire,
-            delay: delay_until(expire),
-            _t: PhantomData,
-        }
-    }
-}
-
-impl<R, E, F> Service for KeepAliveService<R, E, F>
-where
-    F: Fn() -> E,
-{
-    type Request = R;
-    type Response = R;
-    type Error = E;
-    type Future = Ready<Result<R, E>>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        match Pin::new(&mut self.delay).poll(cx) {
-            Poll::Ready(_) => {
-                let now = Instant::from_std(self.time.now());
-                if self.expire <= now {
-                    Poll::Ready(Err((self.f)()))
-                } else {
-                    self.delay.reset(self.expire);
-                    let _ = Pin::new(&mut self.delay).poll(cx);
-                    Poll::Ready(Ok(()))
-                }
-            }
-            Poll::Pending => Poll::Ready(Ok(())),
-        }
-    }
-
-    fn call(&mut self, req: R) -> Self::Future {
-        self.expire = Instant::from_std(self.time.now() + self.ka);
-        ok(req)
-    }
-}

actix-utils/src/lib.rs

@@ -1,18 +1,12 @@
-//! Actix utils - various helper services
+//! Various network related services and utilities for the Actix ecosystem.
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
-pub mod condition;
 pub mod counter;
 pub mod dispatcher;
-pub mod either;
-pub mod inflight;
-pub mod keepalive;
 pub mod mpsc;
-pub mod oneshot;
-pub mod order;
-pub mod stream;
 pub mod task;
-pub mod time;
 pub mod timeout;

actix-utils/src/mpsc.rs

@@ -1,15 +1,17 @@
 //! A multi-producer, single-consumer, futures-aware, FIFO queue.
-use std::any::Any;
-use std::cell::RefCell;
+
+use core::any::Any;
+use core::cell::RefCell;
+use core::fmt;
+use core::pin::Pin;
+use core::task::{Context, Poll};
+
 use std::collections::VecDeque;
 use std::error::Error;
-use std::fmt;
-use std::pin::Pin;
 use std::rc::Rc;
-use std::task::{Context, Poll};
 
+use futures_core::stream::Stream;
 use futures_sink::Sink;
-use futures_util::stream::Stream;
 
 use crate::task::LocalWaker;
 

actix-utils/src/oneshot.rs

@@ -1,316 +0,0 @@
-//! A one-shot, futures-aware channel.
-use std::cell::RefCell;
-use std::future::Future;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-pub use futures_channel::oneshot::Canceled;
-use slab::Slab;
-
-use crate::task::LocalWaker;
-
-/// Creates a new futures-aware, one-shot channel.
-pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
-    let inner = Rc::new(RefCell::new(Inner {
-        value: None,
-        rx_task: LocalWaker::new(),
-    }));
-    let tx = Sender {
-        inner: inner.clone(),
-    };
-    let rx = Receiver { inner };
-    (tx, rx)
-}
-
-/// Creates a new futures-aware, pool of one-shot's.
-pub fn pool<T>() -> Pool<T> {
-    Pool(Rc::new(RefCell::new(Slab::new())))
-}
-
-/// Represents the completion half of a oneshot through which the result of a
-/// computation is signaled.
-#[derive(Debug)]
-pub struct Sender<T> {
-    inner: Rc<RefCell<Inner<T>>>,
-}
-
-/// A future representing the completion of a computation happening elsewhere in
-/// memory.
-#[derive(Debug)]
-#[must_use = "futures do nothing unless polled"]
-pub struct Receiver<T> {
-    inner: Rc<RefCell<Inner<T>>>,
-}
-
-// The channels do not ever project Pin to the inner T
-impl<T> Unpin for Receiver<T> {}
-impl<T> Unpin for Sender<T> {}
-
-#[derive(Debug)]
-struct Inner<T> {
-    value: Option<T>,
-    rx_task: LocalWaker,
-}
-
-impl<T> Sender<T> {
-    /// Completes this oneshot with a successful result.
-    ///
-    /// This function will consume `self` and indicate to the other end, the
-    /// `Receiver`, that the error provided is the result of the computation this
-    /// represents.
-    ///
-    /// If the value is successfully enqueued for the remote end to receive,
-    /// then `Ok(())` is returned. If the receiving end was dropped before
-    /// this function was called, however, then `Err` is returned with the value
-    /// provided.
-    pub fn send(self, val: T) -> Result<(), T> {
-        if Rc::strong_count(&self.inner) == 2 {
-            let mut inner = self.inner.borrow_mut();
-            inner.value = Some(val);
-            inner.rx_task.wake();
-            Ok(())
-        } else {
-            Err(val)
-        }
-    }
-
-    /// Tests to see whether this `Sender`'s corresponding `Receiver`
-    /// has gone away.
-    pub fn is_canceled(&self) -> bool {
-        Rc::strong_count(&self.inner) == 1
-    }
-}
-
-impl<T> Drop for Sender<T> {
-    fn drop(&mut self) {
-        self.inner.borrow().rx_task.wake();
-    }
-}
-
-impl<T> Future for Receiver<T> {
-    type Output = Result<T, Canceled>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
-
-        // If we've got a value, then skip the logic below as we're done.
-        if let Some(val) = this.inner.borrow_mut().value.take() {
-            return Poll::Ready(Ok(val));
-        }
-
-        // Check if sender is dropped and return error if it is.
-        if Rc::strong_count(&this.inner) == 1 {
-            Poll::Ready(Err(Canceled))
-        } else {
-            this.inner.borrow().rx_task.register(cx.waker());
-            Poll::Pending
-        }
-    }
-}
-
-/// Futures-aware, pool of one-shot's.
-pub struct Pool<T>(Rc<RefCell<Slab<PoolInner<T>>>>);
-
-bitflags::bitflags! {
-    pub struct Flags: u8 {
-        const SENDER = 0b0000_0001;
-        const RECEIVER = 0b0000_0010;
-    }
-}
-
-#[derive(Debug)]
-struct PoolInner<T> {
-    flags: Flags,
-    value: Option<T>,
-    waker: LocalWaker,
-}
-
-impl<T> Pool<T> {
-    pub fn channel(&mut self) -> (PSender<T>, PReceiver<T>) {
-        let token = self.0.borrow_mut().insert(PoolInner {
-            flags: Flags::all(),
-            value: None,
-            waker: LocalWaker::default(),
-        });
-
-        (
-            PSender {
-                token,
-                inner: self.0.clone(),
-            },
-            PReceiver {
-                token,
-                inner: self.0.clone(),
-            },
-        )
-    }
-}
-
-impl<T> Clone for Pool<T> {
-    fn clone(&self) -> Self {
-        Pool(self.0.clone())
-    }
-}
-
-/// Represents the completion half of a oneshot through which the result of a
-/// computation is signaled.
-#[derive(Debug)]
-pub struct PSender<T> {
-    token: usize,
-    inner: Rc<RefCell<Slab<PoolInner<T>>>>,
-}
-
-/// A future representing the completion of a computation happening elsewhere in
-/// memory.
-#[derive(Debug)]
-#[must_use = "futures do nothing unless polled"]
-pub struct PReceiver<T> {
-    token: usize,
-    inner: Rc<RefCell<Slab<PoolInner<T>>>>,
-}
-
-// The one-shots do not ever project Pin to the inner T
-impl<T> Unpin for PReceiver<T> {}
-impl<T> Unpin for PSender<T> {}
-
-impl<T> PSender<T> {
-    /// Completes this oneshot with a successful result.
-    ///
-    /// This function will consume `self` and indicate to the other end, the
-    /// `Receiver`, that the error provided is the result of the computation this
-    /// represents.
-    ///
-    /// If the value is successfully enqueued for the remote end to receive,
-    /// then `Ok(())` is returned. If the receiving end was dropped before
-    /// this function was called, however, then `Err` is returned with the value
-    /// provided.
-    pub fn send(self, val: T) -> Result<(), T> {
-        let mut inner = self.inner.borrow_mut();
-        let inner = unsafe { inner.get_unchecked_mut(self.token) };
-
-        if inner.flags.contains(Flags::RECEIVER) {
-            inner.value = Some(val);
-            inner.waker.wake();
-            Ok(())
-        } else {
-            Err(val)
-        }
-    }
-
-    /// Tests to see whether this `Sender`'s corresponding `Receiver`
-    /// has gone away.
-    pub fn is_canceled(&self) -> bool {
-        !unsafe { self.inner.borrow().get_unchecked(self.token) }
-            .flags
-            .contains(Flags::RECEIVER)
-    }
-}
-
-impl<T> Drop for PSender<T> {
-    fn drop(&mut self) {
-        let mut inner = self.inner.borrow_mut();
-        let inner_token = unsafe { inner.get_unchecked_mut(self.token) };
-        if inner_token.flags.contains(Flags::RECEIVER) {
-            inner_token.waker.wake();
-            inner_token.flags.remove(Flags::SENDER);
-        } else {
-            inner.remove(self.token);
-        }
-    }
-}
-
-impl<T> Drop for PReceiver<T> {
-    fn drop(&mut self) {
-        let mut inner = self.inner.borrow_mut();
-        let inner_token = unsafe { inner.get_unchecked_mut(self.token) };
-        if inner_token.flags.contains(Flags::SENDER) {
-            inner_token.flags.remove(Flags::RECEIVER);
-        } else {
-            inner.remove(self.token);
-        }
-    }
-}
-
-impl<T> Future for PReceiver<T> {
-    type Output = Result<T, Canceled>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
-        let mut inner = this.inner.borrow_mut();
-        let inner = unsafe { inner.get_unchecked_mut(this.token) };
-
-        // If we've got a value, then skip the logic below as we're done.
-        if let Some(val) = inner.value.take() {
-            return Poll::Ready(Ok(val));
-        }
-
-        // Check if sender is dropped and return error if it is.
-        if !inner.flags.contains(Flags::SENDER) {
-            Poll::Ready(Err(Canceled))
-        } else {
-            inner.waker.register(cx.waker());
-            Poll::Pending
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use futures_util::future::lazy;
-
-    #[actix_rt::test]
-    async fn test_oneshot() {
-        let (tx, rx) = channel();
-        tx.send("test").unwrap();
-        assert_eq!(rx.await.unwrap(), "test");
-
-        let (tx, rx) = channel();
-        assert!(!tx.is_canceled());
-        drop(rx);
-        assert!(tx.is_canceled());
-        assert!(tx.send("test").is_err());
-
-        let (tx, rx) = channel::<&'static str>();
-        drop(tx);
-        assert!(rx.await.is_err());
-
-        let (tx, mut rx) = channel::<&'static str>();
-        assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
-        tx.send("test").unwrap();
-        assert_eq!(rx.await.unwrap(), "test");
-
-        let (tx, mut rx) = channel::<&'static str>();
-        assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
-        drop(tx);
-        assert!(rx.await.is_err());
-    }
-
-    #[actix_rt::test]
-    async fn test_pool() {
-        let (tx, rx) = pool().channel();
-        tx.send("test").unwrap();
-        assert_eq!(rx.await.unwrap(), "test");
-
-        let (tx, rx) = pool().channel();
-        assert!(!tx.is_canceled());
-        drop(rx);
-        assert!(tx.is_canceled());
-        assert!(tx.send("test").is_err());
-
-        let (tx, rx) = pool::<&'static str>().channel();
-        drop(tx);
-        assert!(rx.await.is_err());
-
-        let (tx, mut rx) = pool::<&'static str>().channel();
-        assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
-        tx.send("test").unwrap();
-        assert_eq!(rx.await.unwrap(), "test");
-
-        let (tx, mut rx) = pool::<&'static str>().channel();
-        assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
-        drop(tx);
-        assert!(rx.await.is_err());
-    }
-}

actix-utils/src/order.rs

@@ -1,278 +0,0 @@
-use std::collections::VecDeque;
-use std::convert::Infallible;
-use std::fmt;
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-use actix_service::{IntoService, Service, Transform};
-use futures_util::future::{ok, Ready};
-
-use crate::oneshot;
-use crate::task::LocalWaker;
-
-struct Record<I, E> {
-    rx: oneshot::Receiver<Result<I, E>>,
-    tx: oneshot::Sender<Result<I, E>>,
-}
-
-/// Timeout error
-pub enum InOrderError<E> {
-    /// Service error
-    Service(E),
-    /// Service call dropped
-    Disconnected,
-}
-
-impl<E> From<E> for InOrderError<E> {
-    fn from(err: E) -> Self {
-        InOrderError::Service(err)
-    }
-}
-
-impl<E: fmt::Debug> fmt::Debug for InOrderError<E> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            InOrderError::Service(e) => write!(f, "InOrderError::Service({:?})", e),
-            InOrderError::Disconnected => write!(f, "InOrderError::Disconnected"),
-        }
-    }
-}
-
-impl<E: fmt::Display> fmt::Display for InOrderError<E> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            InOrderError::Service(e) => e.fmt(f),
-            InOrderError::Disconnected => write!(f, "InOrder service disconnected"),
-        }
-    }
-}
-
-/// InOrder - The service will yield responses as they become available,
-/// in the order that their originating requests were submitted to the service.
-pub struct InOrder<S> {
-    _t: PhantomData<S>,
-}
-
-impl<S> InOrder<S>
-where
-    S: Service,
-    S::Response: 'static,
-    S::Future: 'static,
-    S::Error: 'static,
-{
-    pub fn new() -> Self {
-        Self { _t: PhantomData }
-    }
-
-    pub fn service(service: S) -> InOrderService<S> {
-        InOrderService::new(service)
-    }
-}
-
-impl<S> Default for InOrder<S>
-where
-    S: Service,
-    S::Response: 'static,
-    S::Future: 'static,
-    S::Error: 'static,
-{
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl<S> Transform<S> for InOrder<S>
-where
-    S: Service,
-    S::Response: 'static,
-    S::Future: 'static,
-    S::Error: 'static,
-{
-    type Request = S::Request;
-    type Response = S::Response;
-    type Error = InOrderError<S::Error>;
-    type InitError = Infallible;
-    type Transform = InOrderService<S>;
-    type Future = Ready<Result<Self::Transform, Self::InitError>>;
-
-    fn new_transform(&self, service: S) -> Self::Future {
-        ok(InOrderService::new(service))
-    }
-}
-
-pub struct InOrderService<S: Service> {
-    service: S,
-    waker: Rc<LocalWaker>,
-    acks: VecDeque<Record<S::Response, S::Error>>,
-}
-
-impl<S> InOrderService<S>
-where
-    S: Service,
-    S::Response: 'static,
-    S::Future: 'static,
-    S::Error: 'static,
-{
-    pub fn new<U>(service: U) -> Self
-    where
-        U: IntoService<S>,
-    {
-        Self {
-            service: service.into_service(),
-            acks: VecDeque::new(),
-            waker: Rc::new(LocalWaker::new()),
-        }
-    }
-}
-
-impl<S> Service for InOrderService<S>
-where
-    S: Service,
-    S::Response: 'static,
-    S::Future: 'static,
-    S::Error: 'static,
-{
-    type Request = S::Request;
-    type Response = S::Response;
-    type Error = InOrderError<S::Error>;
-    type Future = InOrderServiceResponse<S>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        // poll_ready could be called from different task
-        self.waker.register(cx.waker());
-
-        // check acks
-        while !self.acks.is_empty() {
-            let rec = self.acks.front_mut().unwrap();
-            match Pin::new(&mut rec.rx).poll(cx) {
-                Poll::Ready(Ok(res)) => {
-                    let rec = self.acks.pop_front().unwrap();
-                    let _ = rec.tx.send(res);
-                }
-                Poll::Pending => break,
-                Poll::Ready(Err(oneshot::Canceled)) => {
-                    return Poll::Ready(Err(InOrderError::Disconnected))
-                }
-            }
-        }
-
-        // check nested service
-        if let Poll::Pending = self.service.poll_ready(cx).map_err(InOrderError::Service)? {
-            Poll::Pending
-        } else {
-            Poll::Ready(Ok(()))
-        }
-    }
-
-    fn call(&mut self, request: S::Request) -> Self::Future {
-        let (tx1, rx1) = oneshot::channel();
-        let (tx2, rx2) = oneshot::channel();
-        self.acks.push_back(Record { rx: rx1, tx: tx2 });
-
-        let waker = self.waker.clone();
-        let fut = self.service.call(request);
-        actix_rt::spawn(async move {
-            let res = fut.await;
-            waker.wake();
-            let _ = tx1.send(res);
-        });
-
-        InOrderServiceResponse { rx: rx2 }
-    }
-}
-
-#[doc(hidden)]
-pub struct InOrderServiceResponse<S: Service> {
-    rx: oneshot::Receiver<Result<S::Response, S::Error>>,
-}
-
-impl<S: Service> Future for InOrderServiceResponse<S> {
-    type Output = Result<S::Response, InOrderError<S::Error>>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        match Pin::new(&mut self.rx).poll(cx) {
-            Poll::Pending => Poll::Pending,
-            Poll::Ready(Ok(Ok(res))) => Poll::Ready(Ok(res)),
-            Poll::Ready(Ok(Err(e))) => Poll::Ready(Err(e.into())),
-            Poll::Ready(Err(_)) => Poll::Ready(Err(InOrderError::Disconnected)),
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-
-    use std::task::{Context, Poll};
-    use std::time::Duration;
-
-    use super::*;
-    use actix_service::Service;
-    use futures_channel::oneshot;
-    use futures_util::future::{lazy, poll_fn, FutureExt, LocalBoxFuture};
-
-    struct Srv;
-
-    impl Service for Srv {
-        type Request = oneshot::Receiver<usize>;
-        type Response = usize;
-        type Error = ();
-        type Future = LocalBoxFuture<'static, Result<usize, ()>>;
-
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
-
-        fn call(&mut self, req: oneshot::Receiver<usize>) -> Self::Future {
-            req.map(|res| res.map_err(|_| ())).boxed_local()
-        }
-    }
-
-    #[actix_rt::test]
-    async fn test_in_order() {
-        let (tx1, rx1) = oneshot::channel();
-        let (tx2, rx2) = oneshot::channel();
-        let (tx3, rx3) = oneshot::channel();
-        let (tx_stop, rx_stop) = oneshot::channel();
-
-        let h = std::thread::spawn(move || {
-            let rx1 = rx1;
-            let rx2 = rx2;
-            let rx3 = rx3;
-            let tx_stop = tx_stop;
-            actix_rt::System::new("test").block_on(async {
-                let mut srv = InOrderService::new(Srv);
-
-                let _ = lazy(|cx| srv.poll_ready(cx)).await;
-                let res1 = srv.call(rx1);
-                let res2 = srv.call(rx2);
-                let res3 = srv.call(rx3);
-
-                actix_rt::spawn(async move {
-                    poll_fn(|cx| {
-                        let _ = srv.poll_ready(cx);
-                        Poll::<()>::Pending
-                    })
-                    .await;
-                });
-
-                assert_eq!(res1.await.unwrap(), 1);
-                assert_eq!(res2.await.unwrap(), 2);
-                assert_eq!(res3.await.unwrap(), 3);
-
-                let _ = tx_stop.send(());
-                actix_rt::System::current().stop();
-            });
-        });
-
-        let _ = tx3.send(3);
-        std::thread::sleep(Duration::from_millis(50));
-        let _ = tx2.send(2);
-        let _ = tx1.send(1);
-
-        let _ = rx_stop.await;
-        let _ = h.join();
-    }
-}

actix-utils/src/stream.rs

@@ -1,76 +0,0 @@
-use std::future::Future;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use actix_service::{IntoService, Service};
-use futures_util::{stream::Stream, FutureExt};
-
-use crate::mpsc;
-
-#[pin_project::pin_project]
-pub struct Dispatcher<S, T>
-where
-    S: Stream,
-    T: Service<Request = S::Item, Response = ()> + 'static,
-{
-    #[pin]
-    stream: S,
-    service: T,
-    err_rx: mpsc::Receiver<T::Error>,
-    err_tx: mpsc::Sender<T::Error>,
-}
-
-impl<S, T> Dispatcher<S, T>
-where
-    S: Stream,
-    T: Service<Request = S::Item, Response = ()> + 'static,
-{
-    pub fn new<F>(stream: S, service: F) -> Self
-    where
-        F: IntoService<T>,
-    {
-        let (err_tx, err_rx) = mpsc::channel();
-        Dispatcher {
-            err_rx,
-            err_tx,
-            stream,
-            service: service.into_service(),
-        }
-    }
-}
-
-impl<S, T> Future for Dispatcher<S, T>
-where
-    S: Stream,
-    T: Service<Request = S::Item, Response = ()> + 'static,
-{
-    type Output = Result<(), T::Error>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.as_mut().project();
-
-        if let Poll::Ready(Some(e)) = Pin::new(&mut this.err_rx).poll_next(cx) {
-            return Poll::Ready(Err(e));
-        }
-
-        loop {
-            return match this.service.poll_ready(cx)? {
-                Poll::Ready(_) => match this.stream.poll_next(cx) {
-                    Poll::Ready(Some(item)) => {
-                        let stop = this.err_tx.clone();
-                        actix_rt::spawn(this.service.call(item).map(move |res| {
-                            if let Err(e) = res {
-                                let _ = stop.send(e);
-                            }
-                        }));
-                        this = self.as_mut().project();
-                        continue;
-                    }
-                    Poll::Pending => Poll::Pending,
-                    Poll::Ready(None) => Poll::Ready(Ok(())),
-                },
-                Poll::Pending => Poll::Pending,
-            };
-        }
-    }
-}

actix-utils/src/task.rs

@@ -1,7 +1,7 @@
-use std::cell::UnsafeCell;
-use std::marker::PhantomData;
-use std::task::Waker;
-use std::{fmt, rc};
+use core::cell::UnsafeCell;
+use core::fmt;
+use core::marker::PhantomData;
+use core::task::Waker;
 
 /// A synchronization primitive for task wakeup.
 ///
@@ -19,10 +19,12 @@ use std::{fmt, rc};
 ///
 /// A single `AtomicWaker` may be reused for any number of calls to `register` or
 /// `wake`.
+// TODO: Refactor to Cell when remove deprecated methods (@botika)
 #[derive(Default)]
 pub struct LocalWaker {
     pub(crate) waker: UnsafeCell<Option<Waker>>,
-    _t: PhantomData<rc::Rc<()>>,
+    // mark LocalWaker as a !Send type.
+    _t: PhantomData<*const ()>,
 }
 
 impl LocalWaker {
@@ -34,6 +36,10 @@ impl LocalWaker {
         }
     }
 
+    #[deprecated(
+        since = "2.1.0",
+        note = "In favor of `wake`. State of the register doesn't matter at `wake` up"
+    )]
     #[inline]
     /// Check if waker has been registered.
     pub fn is_registered(&self) -> bool {
@@ -47,9 +53,8 @@ impl LocalWaker {
     pub fn register(&self, waker: &Waker) -> bool {
         unsafe {
             let w = self.waker.get();
-            let is_registered = (*w).is_some();
-            *w = Some(waker.clone());
-            is_registered
+            let last_waker = w.replace(Some(waker.clone()));
+            last_waker.is_some()
         }
     }
 
@@ -63,6 +68,7 @@ impl LocalWaker {
         }
     }
 
+    #[inline]
     /// Returns the last `Waker` passed to `register`, so that the user can wake it.
     ///
     /// If a waker has not been registered, this returns `None`.

actix-utils/src/time.rs

@@ -1,225 +0,0 @@
-use std::cell::RefCell;
-use std::convert::Infallible;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-use std::time::{self, Duration, Instant};
-
-use actix_rt::time::delay_for;
-use actix_service::{Service, ServiceFactory};
-use futures_util::future::{ok, ready, FutureExt, Ready};
-
-#[derive(Clone, Debug)]
-pub struct LowResTime(Rc<RefCell<Inner>>);
-
-#[derive(Debug)]
-struct Inner {
-    resolution: Duration,
-    current: Option<Instant>,
-}
-
-impl Inner {
-    fn new(resolution: Duration) -> Self {
-        Inner {
-            resolution,
-            current: None,
-        }
-    }
-}
-
-impl LowResTime {
-    pub fn with(resolution: Duration) -> LowResTime {
-        LowResTime(Rc::new(RefCell::new(Inner::new(resolution))))
-    }
-
-    pub fn timer(&self) -> LowResTimeService {
-        LowResTimeService(self.0.clone())
-    }
-}
-
-impl Default for LowResTime {
-    fn default() -> Self {
-        LowResTime(Rc::new(RefCell::new(Inner::new(Duration::from_secs(1)))))
-    }
-}
-
-impl ServiceFactory for LowResTime {
-    type Request = ();
-    type Response = Instant;
-    type Error = Infallible;
-    type InitError = Infallible;
-    type Config = ();
-    type Service = LowResTimeService;
-    type Future = Ready<Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        ok(self.timer())
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct LowResTimeService(Rc<RefCell<Inner>>);
-
-impl LowResTimeService {
-    pub fn with(resolution: Duration) -> LowResTimeService {
-        LowResTimeService(Rc::new(RefCell::new(Inner::new(resolution))))
-    }
-
-    /// Get current time. This function has to be called from
-    /// future's poll method, otherwise it panics.
-    pub fn now(&self) -> Instant {
-        let cur = self.0.borrow().current;
-        if let Some(cur) = cur {
-            cur
-        } else {
-            let now = Instant::now();
-            let inner = self.0.clone();
-            let interval = {
-                let mut b = inner.borrow_mut();
-                b.current = Some(now);
-                b.resolution
-            };
-
-            actix_rt::spawn(delay_for(interval).then(move |_| {
-                inner.borrow_mut().current.take();
-                ready(())
-            }));
-            now
-        }
-    }
-}
-
-impl Service for LowResTimeService {
-    type Request = ();
-    type Response = Instant;
-    type Error = Infallible;
-    type Future = Ready<Result<Self::Response, Self::Error>>;
-
-    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        Poll::Ready(Ok(()))
-    }
-
-    fn call(&mut self, _: ()) -> Self::Future {
-        ok(self.now())
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct SystemTime(Rc<RefCell<SystemTimeInner>>);
-
-#[derive(Debug)]
-struct SystemTimeInner {
-    resolution: Duration,
-    current: Option<time::SystemTime>,
-}
-
-impl SystemTimeInner {
-    fn new(resolution: Duration) -> Self {
-        SystemTimeInner {
-            resolution,
-            current: None,
-        }
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct SystemTimeService(Rc<RefCell<SystemTimeInner>>);
-
-impl SystemTimeService {
-    pub fn with(resolution: Duration) -> SystemTimeService {
-        SystemTimeService(Rc::new(RefCell::new(SystemTimeInner::new(resolution))))
-    }
-
-    /// Get current time. This function has to be called from
-    /// future's poll method, otherwise it panics.
-    pub fn now(&self) -> time::SystemTime {
-        let cur = self.0.borrow().current;
-        if let Some(cur) = cur {
-            cur
-        } else {
-            let now = time::SystemTime::now();
-            let inner = self.0.clone();
-            let interval = {
-                let mut b = inner.borrow_mut();
-                b.current = Some(now);
-                b.resolution
-            };
-
-            actix_rt::spawn(delay_for(interval).then(move |_| {
-                inner.borrow_mut().current.take();
-                ready(())
-            }));
-            now
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use std::time::{Duration, SystemTime};
-
-    /// State Under Test: Two calls of `SystemTimeService::now()` return the same value if they are done within resolution interval of `SystemTimeService`.
-    ///
-    /// Expected Behavior: Two back-to-back calls of `SystemTimeService::now()` return the same value.
-    #[actix_rt::test]
-    async fn system_time_service_time_does_not_immediately_change() {
-        let resolution = Duration::from_millis(50);
-
-        let time_service = SystemTimeService::with(resolution);
-        assert_eq!(time_service.now(), time_service.now());
-    }
-
-    /// State Under Test: Two calls of `LowResTimeService::now()` return the same value if they are done within resolution interval of `SystemTimeService`.
-    ///
-    /// Expected Behavior: Two back-to-back calls of `LowResTimeService::now()` return the same value.
-    #[actix_rt::test]
-    async fn low_res_time_service_time_does_not_immediately_change() {
-        let resolution = Duration::from_millis(50);
-        let time_service = LowResTimeService::with(resolution);
-        assert_eq!(time_service.now(), time_service.now());
-    }
-
-    /// State Under Test: `SystemTimeService::now()` updates returned value every resolution period.
-    ///
-    /// Expected Behavior: Two calls of `LowResTimeService::now()` made in subsequent resolution interval return different values
-    /// and second value is greater than the first one at least by a resolution interval.
-    #[actix_rt::test]
-    async fn system_time_service_time_updates_after_resolution_interval() {
-        let resolution = Duration::from_millis(100);
-        let wait_time = Duration::from_millis(300);
-
-        let time_service = SystemTimeService::with(resolution);
-
-        let first_time = time_service
-            .now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .unwrap();
-
-        delay_for(wait_time).await;
-
-        let second_time = time_service
-            .now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .unwrap();
-
-        assert!(second_time - first_time >= wait_time);
-    }
-
-    /// State Under Test: `LowResTimeService::now()` updates returned value every resolution period.
-    ///
-    /// Expected Behavior: Two calls of `LowResTimeService::now()` made in subsequent resolution interval return different values
-    /// and second value is greater than the first one at least by a resolution interval.
-    #[actix_rt::test]
-    async fn low_res_time_service_time_updates_after_resolution_interval() {
-        let resolution = Duration::from_millis(100);
-        let wait_time = Duration::from_millis(300);
-        let time_service = LowResTimeService::with(resolution);
-
-        let first_time = time_service.now();
-
-        delay_for(wait_time).await;
-
-        let second_time = time_service.now();
-        assert!(second_time - first_time >= wait_time);
-    }
-}

actix-utils/src/timeout.rs

@@ -1,16 +1,16 @@
 //! Service that applies a timeout to requests.
 //!
-//! If the response does not complete within the specified timeout, the response
-//! will be aborted.
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-use std::{fmt, time};
+//! If the response does not complete within the specified timeout, the response will be aborted.
 
-use actix_rt::time::{delay_for, Delay};
+use core::future::Future;
+use core::marker::PhantomData;
+use core::pin::Pin;
+use core::task::{Context, Poll};
+use core::{fmt, time};
+
+use actix_rt::time::{sleep, Sleep};
 use actix_service::{IntoService, Service, Transform};
-use futures_util::future::{ok, Ready};
+use pin_project_lite::pin_project;
 
 /// Applies a timeout to requests.
 #[derive(Debug)]
@@ -78,126 +78,149 @@ impl<E> Clone for Timeout<E> {
     }
 }
 
-impl<S, E> Transform<S> for Timeout<E>
+impl<S, E, Req> Transform<S, Req> for Timeout<E>
 where
-    S: Service,
+    S: Service<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = TimeoutError<S::Error>;
+    type Transform = TimeoutService<S, Req>;
     type InitError = E;
-    type Transform = TimeoutService<S>;
-    type Future = Ready<Result<Self::Transform, Self::InitError>>;
+    type Future = TimeoutFuture<Self::Transform, Self::InitError>;
 
     fn new_transform(&self, service: S) -> Self::Future {
-        ok(TimeoutService {
+        let service = TimeoutService {
             service,
             timeout: self.timeout,
-        })
+            _phantom: PhantomData,
+        };
+
+        TimeoutFuture {
+            service: Some(service),
+            _err: PhantomData,
+        }
+    }
+}
+
+pub struct TimeoutFuture<T, E> {
+    service: Option<T>,
+    _err: PhantomData<E>,
+}
+
+impl<T, E> Unpin for TimeoutFuture<T, E> {}
+
+impl<T, E> Future for TimeoutFuture<T, E> {
+    type Output = Result<T, E>;
+
+    fn poll(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
+        Poll::Ready(Ok(self.get_mut().service.take().unwrap()))
     }
 }
 
 /// Applies a timeout to requests.
 #[derive(Debug, Clone)]
-pub struct TimeoutService<S> {
+pub struct TimeoutService<S, Req> {
     service: S,
     timeout: time::Duration,
+    _phantom: PhantomData<Req>,
 }
 
-impl<S> TimeoutService<S>
+impl<S, Req> TimeoutService<S, Req>
 where
-    S: Service,
+    S: Service<Req>,
 {
     pub fn new<U>(timeout: time::Duration, service: U) -> Self
     where
-        U: IntoService<S>,
+        U: IntoService<S, Req>,
     {
         TimeoutService {
             timeout,
             service: service.into_service(),
+            _phantom: PhantomData,
         }
     }
 }
 
-impl<S> Service for TimeoutService<S>
+impl<S, Req> Service<Req> for TimeoutService<S, Req>
 where
-    S: Service,
+    S: Service<Req>,
 {
-    type Request = S::Request;
     type Response = S::Response;
     type Error = TimeoutError<S::Error>;
-    type Future = TimeoutServiceResponse<S>;
+    type Future = TimeoutServiceResponse<S, Req>;
 
     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx).map_err(TimeoutError::Service)
     }
 
-    fn call(&mut self, request: S::Request) -> Self::Future {
+    fn call(&mut self, request: Req) -> Self::Future {
         TimeoutServiceResponse {
             fut: self.service.call(request),
-            sleep: delay_for(self.timeout),
+            sleep: sleep(self.timeout),
         }
     }
 }
 
-/// `TimeoutService` response future
-#[pin_project::pin_project]
-#[derive(Debug)]
-pub struct TimeoutServiceResponse<T: Service> {
-    #[pin]
-    fut: T::Future,
-    sleep: Delay,
+pin_project! {
+    /// `TimeoutService` response future
+    #[derive(Debug)]
+    pub struct TimeoutServiceResponse<S, Req>
+    where
+        S: Service<Req>
+    {
+        #[pin]
+        fut: S::Future,
+        #[pin]
+        sleep: Sleep,
+    }
 }
 
-impl<T> Future for TimeoutServiceResponse<T>
+impl<S, Req> Future for TimeoutServiceResponse<S, Req>
 where
-    T: Service,
+    S: Service<Req>,
 {
-    type Output = Result<T::Response, TimeoutError<T::Error>>;
+    type Output = Result<S::Response, TimeoutError<S::Error>>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.project();
+        let this = self.project();
 
         // First, try polling the future
-        match this.fut.poll(cx) {
-            Poll::Ready(Ok(v)) => return Poll::Ready(Ok(v)),
-            Poll::Ready(Err(e)) => return Poll::Ready(Err(TimeoutError::Service(e))),
-            Poll::Pending => {}
+        if let Poll::Ready(res) = this.fut.poll(cx) {
+            return match res {
+                Ok(v) => Poll::Ready(Ok(v)),
+                Err(e) => Poll::Ready(Err(TimeoutError::Service(e))),
+            };
         }
 
         // Now check the sleep
-        match Pin::new(&mut this.sleep).poll(cx) {
-            Poll::Pending => Poll::Pending,
-            Poll::Ready(_) => Poll::Ready(Err(TimeoutError::Timeout)),
-        }
+        this.sleep.poll(cx).map(|_| Err(TimeoutError::Timeout))
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use std::task::{Context, Poll};
-    use std::time::Duration;
+    use core::task::Poll;
+    use core::time::Duration;
 
     use super::*;
     use actix_service::{apply, fn_factory, Service, ServiceFactory};
-    use futures_util::future::{ok, FutureExt, LocalBoxFuture};
+    use futures_core::future::LocalBoxFuture;
 
     struct SleepService(Duration);
 
-    impl Service for SleepService {
-        type Request = ();
+    impl Service<()> for SleepService {
         type Response = ();
         type Error = ();
         type Future = LocalBoxFuture<'static, Result<(), ()>>;
 
-        fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-            Poll::Ready(Ok(()))
-        }
+        actix_service::always_ready!();
 
         fn call(&mut self, _: ()) -> Self::Future {
-            actix_rt::time::delay_for(self.0)
-                .then(|_| ok::<_, ()>(()))
-                .boxed_local()
+            let sleep = actix_rt::time::sleep(self.0);
+            Box::pin(async move {
+                sleep.await;
+                Ok(())
+            })
         }
     }
 
@@ -226,7 +249,7 @@ mod tests {
 
         let timeout = apply(
             Timeout::new(resolution),
-            fn_factory(|| ok::<_, ()>(SleepService(wait_time))),
+            fn_factory(|| async { Ok::<_, ()>(SleepService(wait_time)) }),
         );
         let mut srv = timeout.new_service(&()).await.unwrap();
 

codecov.yml

@@ -1,3 +1,5 @@
+comment: false
+
 coverage:
   status:
     project:

router/src/de.rs

@@ -42,7 +42,7 @@ macro_rules! parse_single_value {
     };
 }
 
-pub struct PathDeserializer<'de, T: ResourcePath + 'de> {
+pub struct PathDeserializer<'de, T: ResourcePath> {
     path: &'de Path<T>,
 }