diff options
Diffstat (limited to 'src/util/background/worker.rs')
| -rw-r--r-- | src/util/background/worker.rs | 85 |
1 files changed, 29 insertions, 56 deletions
diff --git a/src/util/background/worker.rs b/src/util/background/worker.rs index f5e3addb..8165e2cb 100644 --- a/src/util/background/worker.rs +++ b/src/util/background/worker.rs @@ -1,6 +1,6 @@ use std::collections::HashMap; use std::sync::Arc; -use std::time::{Duration, Instant}; +use std::time::Duration; use async_trait::async_trait; use futures::future::*; @@ -10,10 +10,14 @@ use serde::{Deserialize, Serialize}; use tokio::select; use tokio::sync::{mpsc, watch}; -use crate::background::WorkerInfo; +use crate::background::{WorkerInfo, WorkerStatus}; use crate::error::Error; use crate::time::now_msec; +// All workers that haven't exited for this time after an exit signal was recieved +// will be interrupted in the middle of whatever they are doing. +const EXIT_DEADLINE: Duration = Duration::from_secs(8); + #[derive(PartialEq, Copy, Clone, Serialize, Deserialize, Debug)] pub enum WorkerState { Busy, @@ -26,7 +30,7 @@ impl std::fmt::Display for WorkerState { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { WorkerState::Busy => write!(f, "Busy"), - WorkerState::Throttled(t) => write!(f, "Thr:{:.3}", t), + WorkerState::Throttled(_) => write!(f, "Busy*"), WorkerState::Idle => write!(f, "Idle"), WorkerState::Done => write!(f, "Done"), } @@ -37,8 +41,8 @@ impl std::fmt::Display for WorkerState { pub trait Worker: Send { fn name(&self) -> String; - fn info(&self) -> Option<String> { - None + fn status(&self) -> WorkerStatus { + Default::default() } /// Work: do a basic unit of work, if one is available (otherwise, should return @@ -50,10 +54,8 @@ pub trait Worker: Send { async fn work(&mut self, must_exit: &mut watch::Receiver<bool>) -> Result<WorkerState, Error>; /// Wait for work: await for some task to become available. This future can be interrupted in - /// the middle for any reason. This future doesn't have to await on must_exit.changed(), we - /// are doing it for you. Therefore it only receives a read refernce to must_exit which allows - /// it to check if we are exiting. - async fn wait_for_work(&mut self, must_exit: &watch::Receiver<bool>) -> WorkerState; + /// the middle for any reason, for example if an interrupt signal was recieved. + async fn wait_for_work(&mut self) -> WorkerState; } pub(crate) struct WorkerProcessor { @@ -93,11 +95,9 @@ impl WorkerProcessor { let task_id = next_task_id; next_task_id += 1; let stop_signal = self.stop_signal.clone(); - let stop_signal_worker = self.stop_signal.clone(); let mut worker = WorkerHandler { task_id, stop_signal, - stop_signal_worker, worker: new_worker, state: WorkerState::Busy, errors: 0, @@ -119,7 +119,7 @@ impl WorkerProcessor { match wi.get_mut(&worker.task_id) { Some(i) => { i.state = worker.state; - i.info = worker.worker.info(); + i.status = worker.worker.status(); i.errors = worker.errors; i.consecutive_errors = worker.consecutive_errors; if worker.last_error.is_some() { @@ -130,7 +130,7 @@ impl WorkerProcessor { wi.insert(worker.task_id, WorkerInfo { name: worker.worker.name(), state: worker.state, - info: worker.worker.info(), + status: worker.worker.status(), errors: worker.errors, consecutive_errors: worker.consecutive_errors, last_error: worker.last_error.take(), @@ -153,26 +153,14 @@ impl WorkerProcessor { } // We are exiting, drain everything - let drain_half_time = Instant::now() + Duration::from_secs(5); let drain_everything = async move { - while let Some(mut worker) = workers.next().await { - if worker.state == WorkerState::Done { - info!( - "Worker {} (TID {}) exited", - worker.worker.name(), - worker.task_id - ); - } else if Instant::now() > drain_half_time { - warn!("Worker {} (TID {}) interrupted between two iterations in state {:?} (this should be fine)", worker.worker.name(), worker.task_id, worker.state); - } else { - workers.push( - async move { - worker.step().await; - worker - } - .boxed(), - ); - } + while let Some(worker) = workers.next().await { + info!( + "Worker {} (TID {}) exited (last state: {:?})", + worker.worker.name(), + worker.task_id, + worker.state + ); } }; @@ -180,7 +168,7 @@ impl WorkerProcessor { _ = drain_everything => { info!("All workers exited peacefully \\o/"); } - _ = tokio::time::sleep(Duration::from_secs(9)) => { + _ = tokio::time::sleep(EXIT_DEADLINE) => { error!("Some workers could not exit in time, we are cancelling some things in the middle"); } } @@ -190,7 +178,6 @@ impl WorkerProcessor { struct WorkerHandler { task_id: usize, stop_signal: watch::Receiver<bool>, - stop_signal_worker: watch::Receiver<bool>, worker: Box<dyn Worker>, state: WorkerState, errors: usize, @@ -225,33 +212,19 @@ impl WorkerHandler { }, WorkerState::Throttled(delay) => { // Sleep for given delay and go back to busy state - if !*self.stop_signal.borrow() { - select! { - _ = tokio::time::sleep(Duration::from_secs_f32(delay)) => (), - _ = self.stop_signal.changed() => (), + select! { + _ = tokio::time::sleep(Duration::from_secs_f32(delay)) => { + self.state = WorkerState::Busy; } + _ = self.stop_signal.changed() => (), } - self.state = WorkerState::Busy; } WorkerState::Idle => { - if *self.stop_signal.borrow() { - select! { - new_st = self.worker.wait_for_work(&self.stop_signal_worker) => { - self.state = new_st; - } - _ = tokio::time::sleep(Duration::from_secs(1)) => { - // stay in Idle state - } - } - } else { - select! { - new_st = self.worker.wait_for_work(&self.stop_signal_worker) => { - self.state = new_st; - } - _ = self.stop_signal.changed() => { - // stay in Idle state - } + select! { + new_st = self.worker.wait_for_work() => { + self.state = new_st; } + _ = self.stop_signal.changed() => (), } } WorkerState::Done => unreachable!(), |