mirror of
https://github.com/fafhrd91/actix-net
synced 2024-11-27 18:02:58 +01:00
Refactor WorkerState::Shutdown (#310)
This commit is contained in:
fakeshadow
GitHub
parent
8079c50ddb
commit
8aade720ed
@ -1,17 +1,27 @@
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use std::future::Future;
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use std::pin::Pin;
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use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
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use std::sync::Arc;
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use std::task::{Context, Poll};
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use std::time::Duration;
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use std::{
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future::Future,
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mem,
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pin::Pin,
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sync::{
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atomic::{AtomicBool, AtomicUsize, Ordering},
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Arc,
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},
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task::{Context, Poll},
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time::Duration,
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};
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use actix_rt::time::{sleep, Sleep};
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use actix_rt::{spawn, Arbiter};
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use actix_rt::{
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spawn,
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time::{sleep, Instant, Sleep},
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Arbiter,
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};
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use actix_utils::counter::Counter;
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use futures_core::{future::LocalBoxFuture, ready};
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use log::{error, info, trace};
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use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender};
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use tokio::sync::oneshot;
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use tokio::sync::{
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mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender},
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oneshot,
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};
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use crate::service::{BoxedServerService, InternalServiceFactory};
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use crate::socket::MioStream;
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@ -132,7 +142,7 @@ pub(crate) struct ServerWorker {
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conns: Counter,
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factories: Vec<Box<dyn InternalServiceFactory>>,
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state: WorkerState,
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config: ServerWorkerConfig,
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shutdown_timeout: Duration,
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}
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struct WorkerService {
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@ -211,12 +221,12 @@ impl ServerWorker {
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let mut wrk = MAX_CONNS_COUNTER.with(move |conns| ServerWorker {
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rx,
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rx2,
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services: Default::default(),
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availability,
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factories,
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config,
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services: Vec::new(),
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state: Default::default(),
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shutdown_timeout: config.shutdown_timeout,
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conns: conns.clone(),
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state: WorkerState::Unavailable,
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});
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let fut = wrk
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@ -337,53 +347,61 @@ enum WorkerState {
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Token,
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LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>>,
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),
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Shutdown(
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Pin<Box<Sleep>>,
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Pin<Box<Sleep>>,
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Option<oneshot::Sender<bool>>,
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),
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// Shutdown keep states necessary for server shutdown:
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// Sleep for interval check the shutdown progress.
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// Instant for the start time of shutdown.
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// Sender for send back the shutdown outcome(force/grace) to StopCommand caller.
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Shutdown(Pin<Box<Sleep>>, Instant, oneshot::Sender<bool>),
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}
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impl Default for WorkerState {
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fn default() -> Self {
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Self::Unavailable
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}
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}
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impl Future for ServerWorker {
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type Output = ();
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fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let this = self.as_mut().get_mut();
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// `StopWorker` message handler
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if let Poll::Ready(Some(StopCommand { graceful, result })) =
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Pin::new(&mut self.rx2).poll_recv(cx)
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Pin::new(&mut this.rx2).poll_recv(cx)
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{
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self.availability.set(false);
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this.availability.set(false);
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let num = num_connections();
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if num == 0 {
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info!("Shutting down worker, 0 connections");
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let _ = result.send(true);
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return Poll::Ready(());
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} else if graceful {
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self.shutdown(false);
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info!("Graceful worker shutdown, {} connections", num);
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self.state = WorkerState::Shutdown(
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Box::pin(sleep(Duration::from_secs(1))),
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Box::pin(sleep(self.config.shutdown_timeout)),
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Some(result),
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);
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this.shutdown(false);
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let timer = Box::pin(sleep(Duration::from_secs(1)));
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let start_from = Instant::now();
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this.state = WorkerState::Shutdown(timer, start_from, result);
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} else {
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info!("Force shutdown worker, {} connections", num);
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self.shutdown(true);
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this.shutdown(true);
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let _ = result.send(false);
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return Poll::Ready(());
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}
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}
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match self.state {
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WorkerState::Unavailable => match self.check_readiness(cx) {
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match this.state {
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WorkerState::Unavailable => match this.check_readiness(cx) {
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Ok(true) => {
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self.state = WorkerState::Available;
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self.availability.set(true);
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this.state = WorkerState::Available;
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this.availability.set(true);
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self.poll(cx)
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}
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Ok(false) => Poll::Pending,
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Err((token, idx)) => {
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self.restart_service(token, idx);
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this.restart_service(token, idx);
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self.poll(cx)
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}
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},
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@ -391,7 +409,7 @@ impl Future for ServerWorker {
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let item = ready!(fut.as_mut().poll(cx)).unwrap_or_else(|_| {
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panic!(
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"Can not restart {:?} service",
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self.factories[idx].name(token)
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this.factories[idx].name(token)
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)
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});
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@ -403,60 +421,61 @@ impl Future for ServerWorker {
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trace!(
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"Service {:?} has been restarted",
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self.factories[idx].name(token)
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this.factories[idx].name(token)
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);
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self.services[token.0].created(service);
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self.state = WorkerState::Unavailable;
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this.services[token.0].created(service);
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this.state = WorkerState::Unavailable;
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self.poll(cx)
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}
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WorkerState::Shutdown(ref mut t1, ref mut t2, ref mut tx) => {
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let num = num_connections();
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if num == 0 {
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let _ = tx.take().unwrap().send(true);
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WorkerState::Shutdown(ref mut timer, ref start_from, _) => {
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// Wait for 1 second.
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ready!(timer.as_mut().poll(cx));
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if num_connections() == 0 {
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// Graceful shutdown.
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if let WorkerState::Shutdown(_, _, sender) = mem::take(&mut this.state) {
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let _ = sender.send(true);
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}
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Arbiter::current().stop();
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return Poll::Ready(());
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Poll::Ready(())
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} else if start_from.elapsed() >= this.shutdown_timeout {
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// Timeout forceful shutdown.
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if let WorkerState::Shutdown(_, _, sender) = mem::take(&mut this.state) {
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let _ = sender.send(false);
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}
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// check graceful timeout
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if Pin::new(t2).poll(cx).is_ready() {
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let _ = tx.take().unwrap().send(false);
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self.shutdown(true);
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Arbiter::current().stop();
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return Poll::Ready(());
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Poll::Ready(())
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} else {
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// Reset timer and wait for 1 second.
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let time = Instant::now() + Duration::from_secs(1);
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timer.as_mut().reset(time);
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timer.as_mut().poll(cx)
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}
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// sleep for 1 second and then check again
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if t1.as_mut().poll(cx).is_ready() {
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*t1 = Box::pin(sleep(Duration::from_secs(1)));
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let _ = t1.as_mut().poll(cx);
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}
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Poll::Pending
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}
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// actively poll stream and handle worker command
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WorkerState::Available => loop {
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match self.check_readiness(cx) {
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match this.check_readiness(cx) {
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Ok(true) => {}
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Ok(false) => {
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trace!("Worker is unavailable");
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self.availability.set(false);
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self.state = WorkerState::Unavailable;
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this.availability.set(false);
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this.state = WorkerState::Unavailable;
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return self.poll(cx);
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}
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Err((token, idx)) => {
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self.restart_service(token, idx);
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self.availability.set(false);
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this.restart_service(token, idx);
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this.availability.set(false);
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return self.poll(cx);
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}
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}
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match ready!(Pin::new(&mut self.rx).poll_recv(cx)) {
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match ready!(Pin::new(&mut this.rx).poll_recv(cx)) {
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// handle incoming io stream
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Some(WorkerCommand(msg)) => {
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let guard = self.conns.get();
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let _ = self.services[msg.token.0].service.call((guard, msg.io));
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let guard = this.conns.get();
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let _ = this.services[msg.token.0].service.call((guard, msg.io));
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}
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None => return Poll::Ready(()),
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};
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