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Use named type for WorkerState::Restarting and Shutdown (#317)

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fakeshadow 2021-04-04 13:53:19 -07:00 committed by GitHub
parent 8aade720ed
commit 3859e91799
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1 changed files with 53 additions and 36 deletions
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89
actix-server/src/worker.rs
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@ -34,7 +34,7 @@ pub(crate) struct WorkerCommand(Conn);
/// and `false` if some connections still alive.
pub(crate) struct StopCommand {
graceful: bool,
result: oneshot::Sender<bool>,
tx: oneshot::Sender<bool>,
}
#[derive(Debug)]
@ -98,8 +98,8 @@ impl WorkerHandle {
}
pub fn stop(&self, graceful: bool) -> oneshot::Receiver<bool> {
let (result, rx) = oneshot::channel();
let _ = self.tx2.send(StopCommand { graceful, result });
let (tx, rx) = oneshot::channel();
let _ = self.tx2.send(StopCommand { graceful, tx });
rx
}
}
@ -221,7 +221,7 @@ impl ServerWorker {
let mut wrk = MAX_CONNS_COUNTER.with(move |conns| ServerWorker {
rx,
rx2,
services: Default::default(),
services: Vec::new(),
availability,
factories,
state: Default::default(),
@ -272,11 +272,15 @@ impl ServerWorker {
WorkerHandle::new(idx, tx1, tx2, avail)
}
fn restart_service(&mut self, token: Token, idx: usize) {
let factory = &self.factories[idx];
fn restart_service(&mut self, token: Token, factory_id: usize) {
let factory = &self.factories[factory_id];
trace!("Service {:?} failed, restarting", factory.name(token));
self.services[token.0].status = WorkerServiceStatus::Restarting;
self.state = WorkerState::Restarting(idx, token, factory.create());
self.state = WorkerState::Restarting(Restart {
factory_id,
token,
fut: factory.create(),
});
}
fn shutdown(&mut self, force: bool) {
@ -342,16 +346,24 @@ impl ServerWorker {
enum WorkerState {
Available,
Unavailable,
Restarting(
usize,
Token,
LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>>,
),
// Shutdown keep states necessary for server shutdown:
// Sleep for interval check the shutdown progress.
// Instant for the start time of shutdown.
// Sender for send back the shutdown outcome(force/grace) to StopCommand caller.
Shutdown(Pin<Box<Sleep>>, Instant, oneshot::Sender<bool>),
Restarting(Restart),
Shutdown(Shutdown),
}
struct Restart {
factory_id: usize,
token: Token,
fut: LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>>,
}
// Shutdown keep states necessary for server shutdown:
// Sleep for interval check the shutdown progress.
// Instant for the start time of shutdown.
// Sender for send back the shutdown outcome(force/grace) to StopCommand caller.
struct Shutdown {
timer: Pin<Box<Sleep>>,
start_from: Instant,
tx: oneshot::Sender<bool>,
}
impl Default for WorkerState {
@ -367,27 +379,29 @@ impl Future for ServerWorker {
let this = self.as_mut().get_mut();
// `StopWorker` message handler
if let Poll::Ready(Some(StopCommand { graceful, result })) =
if let Poll::Ready(Some(StopCommand { graceful, tx })) =
Pin::new(&mut this.rx2).poll_recv(cx)
{
this.availability.set(false);
let num = num_connections();
if num == 0 {
info!("Shutting down worker, 0 connections");
let _ = result.send(true);
let _ = tx.send(true);
return Poll::Ready(());
} else if graceful {
info!("Graceful worker shutdown, {} connections", num);
this.shutdown(false);
let timer = Box::pin(sleep(Duration::from_secs(1)));
let start_from = Instant::now();
this.state = WorkerState::Shutdown(timer, start_from, result);
this.state = WorkerState::Shutdown(Shutdown {
timer: Box::pin(sleep(Duration::from_secs(1))),
start_from: Instant::now(),
tx,
});
} else {
info!("Force shutdown worker, {} connections", num);
this.shutdown(true);
let _ = result.send(false);
let _ = tx.send(false);
return Poll::Ready(());
}
}
@ -405,11 +419,14 @@ impl Future for ServerWorker {
self.poll(cx)
}
},
WorkerState::Restarting(idx, token, ref mut fut) => {
let item = ready!(fut.as_mut().poll(cx)).unwrap_or_else(|_| {
WorkerState::Restarting(ref mut restart) => {
let factory_id = restart.factory_id;
let token = restart.token;
let item = ready!(restart.fut.as_mut().poll(cx)).unwrap_or_else(|_| {
panic!(
"Can not restart {:?} service",
this.factories[idx].name(token)
this.factories[factory_id].name(token)
)
});
@ -421,7 +438,7 @@ impl Future for ServerWorker {
trace!(
"Service {:?} has been restarted",
this.factories[idx].name(token)
this.factories[factory_id].name(token)
);
this.services[token.0].created(service);
@ -429,29 +446,29 @@ impl Future for ServerWorker {
self.poll(cx)
}
WorkerState::Shutdown(ref mut timer, ref start_from, _) => {
WorkerState::Shutdown(ref mut shutdown) => {
// Wait for 1 second.
ready!(timer.as_mut().poll(cx));
ready!(shutdown.timer.as_mut().poll(cx));
if num_connections() == 0 {
// Graceful shutdown.
if let WorkerState::Shutdown(_, _, sender) = mem::take(&mut this.state) {
let _ = sender.send(true);
if let WorkerState::Shutdown(shutdown) = mem::take(&mut this.state) {
let _ = shutdown.tx.send(true);
}
Arbiter::current().stop();
Poll::Ready(())
} else if start_from.elapsed() >= this.shutdown_timeout {
} else if shutdown.start_from.elapsed() >= this.shutdown_timeout {
// Timeout forceful shutdown.
if let WorkerState::Shutdown(_, _, sender) = mem::take(&mut this.state) {
let _ = sender.send(false);
if let WorkerState::Shutdown(shutdown) = mem::take(&mut this.state) {
let _ = shutdown.tx.send(false);
}
Arbiter::current().stop();
Poll::Ready(())
} else {
// Reset timer and wait for 1 second.
let time = Instant::now() + Duration::from_secs(1);
timer.as_mut().reset(time);
timer.as_mut().poll(cx)
shutdown.timer.as_mut().reset(time);
shutdown.timer.as_mut().poll(cx)
}
}
// actively poll stream and handle worker command