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add some internal server documentation

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This commit is contained in:
Rob Ede 2021-11-28 00:35:34 +00:00
parent 18eced7305
commit 44e4381879
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GPG Key ID: 97C636207D3EF933
3 changed files with 35 additions and 30 deletions
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20
actix-server/src/server.rs
View File

@ -19,7 +19,7 @@ use crate::{
builder::ServerBuilder,
join_all::join_all,
service::InternalServiceFactory,
signals::{Signal, Signals},
signals::{SignalKind, Signals},
waker_queue::{WakerInterest, WakerQueue},
worker::{ServerWorker, ServerWorkerConfig, WorkerHandleServer},
ServerHandle,
@ -27,16 +27,22 @@ use crate::{
#[derive(Debug)]
pub(crate) enum ServerCommand {
/// TODO
/// Worker failed to accept connection, indicating a probable panic.
///
/// Contains index of faulted worker.
WorkerFaulted(usize),
/// Pause accepting connections.
///
/// Contains return channel to notify caller of successful state change.
Pause(oneshot::Sender<()>),
/// Resume accepting connections.
///
/// Contains return channel to notify caller of successful state change.
Resume(oneshot::Sender<()>),
/// TODO
/// Stop accepting connections and begin shutdown procedure.
Stop {
/// True if shut down should be graceful.
graceful: bool,
@ -324,9 +330,9 @@ impl ServerInner {
}
}
fn handle_signal(&mut self, signal: Signal) -> Option<BoxFuture<'static, ()>> {
fn handle_signal(&mut self, signal: SignalKind) -> Option<BoxFuture<'static, ()>> {
match signal {
Signal::Int => {
SignalKind::Int => {
info!("SIGINT received; starting forced shutdown");
self.exit = true;
self.handle_cmd(ServerCommand::Stop {
@ -335,7 +341,7 @@ impl ServerInner {
})
}
Signal::Term => {
SignalKind::Term => {
info!("SIGTERM received; starting graceful shutdown");
self.exit = true;
self.handle_cmd(ServerCommand::Stop {
@ -344,7 +350,7 @@ impl ServerInner {
})
}
Signal::Quit => {
SignalKind::Quit => {
info!("SIGQUIT received; starting forced shutdown");
self.exit = true;
self.handle_cmd(ServerCommand::Stop {

23
actix-server/src/signals.rs
View File

@ -11,7 +11,7 @@ use log::trace;
// #[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq)]
#[allow(dead_code)] // variants are never constructed on non-unix
pub(crate) enum Signal {
pub(crate) enum SignalKind {
/// `SIGINT`
Int,
@ -22,12 +22,12 @@ pub(crate) enum Signal {
Quit,
}
impl fmt::Display for Signal {
impl fmt::Display for SignalKind {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match self {
Signal::Int => "SIGINT",
Signal::Term => "SIGTERM",
Signal::Quit => "SIGQUIT",
SignalKind::Int => "SIGINT",
SignalKind::Term => "SIGTERM",
SignalKind::Quit => "SIGQUIT",
})
}
}
@ -38,7 +38,7 @@ pub(crate) struct Signals {
signals: futures_core::future::BoxFuture<'static, std::io::Result<()>>,
#[cfg(unix)]
signals: Vec<(Signal, actix_rt::signal::unix::Signal)>,
signals: Vec<(SignalKind, actix_rt::signal::unix::Signal)>,
}
impl Signals {
@ -58,9 +58,9 @@ impl Signals {
use actix_rt::signal::unix;
let sig_map = [
(unix::SignalKind::interrupt(), Signal::Int),
(unix::SignalKind::terminate(), Signal::Term),
(unix::SignalKind::quit(), Signal::Quit),
(unix::SignalKind::interrupt(), SignalKind::Int),
(unix::SignalKind::terminate(), SignalKind::Term),
(unix::SignalKind::quit(), SignalKind::Quit),
];
let signals = sig_map
@ -85,18 +85,17 @@ impl Signals {
}
impl Future for Signals {
type Output = Signal;
type Output = SignalKind;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
#[cfg(not(unix))]
{
self.signals.as_mut().poll(cx).map(|_| Signal::Int)
self.signals.as_mut().poll(cx).map(|_| SignalKind::Int)
}
#[cfg(unix)]
{
for (sig, fut) in self.signals.iter_mut() {
// TODO: match on if let Some ?
if Pin::new(fut).poll_recv(cx).is_ready() {
trace!("{} received", sig);
return Poll::Ready(*sig);

22
actix-server/src/socket.rs
View File

@ -159,24 +159,24 @@ pub enum MioStream {
Uds(mio::net::UnixStream),
}
/// helper trait for converting mio stream to tokio stream.
/// Helper trait for converting a Mio stream into a Tokio stream.
pub trait FromStream: Sized {
fn from_mio(sock: MioStream) -> io::Result<Self>;
}
#[cfg(windows)]
mod win_impl {
use super::*;
use std::os::windows::io::{FromRawSocket, IntoRawSocket};
// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
use super::*;
// TODO: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
impl FromStream for TcpStream {
fn from_mio(sock: MioStream) -> io::Result<Self> {
match sock {
MioStream::Tcp(mio) => {
let raw = IntoRawSocket::into_raw_socket(mio);
// SAFETY: This is a in place conversion from mio stream to tokio stream.
// SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
TcpStream::from_std(unsafe { FromRawSocket::from_raw_socket(raw) })
}
}
@ -186,19 +186,19 @@ mod win_impl {
#[cfg(unix)]
mod unix_impl {
use super::*;
use std::os::unix::io::{FromRawFd, IntoRawFd};
use actix_rt::net::UnixStream;
// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
use super::*;
// HACK: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
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.
// SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
TcpStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
}
MioStream::Uds(_) => {
@ -208,14 +208,14 @@ mod unix_impl {
}
}
// FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
// HACK: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
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.
// SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
UnixStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
}
}