actix_daemon_utils/
looper.rs

1use crate::graceful_stop::{StopRequest, SystemTerminator};
2use actix::prelude::*;
3use std::sync::Arc;
4use std::time::Duration;
5
6/// This is a loop actor.
7#[allow(dead_code)]
8pub struct Looper {
9    task: Recipient<Task>,
10    system_terminator: Arc<SystemTerminator>,
11}
12
13#[derive(Message, Debug)]
14#[rtype(result = "()")]
15enum NextLoop {
16    Immediately,
17    Later(Duration),
18}
19
20/// This is a task call by Looper after specified seconds spend.
21#[derive(Message, Debug)]
22#[rtype(result = "Option<Duration>")]
23pub struct Task;
24
25impl Looper {
26    pub fn new(task: Recipient<Task>, system_terminator: Arc<SystemTerminator>) -> Self {
27        Self {
28            task: task,
29            system_terminator: system_terminator,
30        }
31    }
32}
33
34impl Actor for Looper {
35    type Context = Context<Self>;
36
37    fn started(&mut self, ctx: &mut Self::Context) {
38        ctx.notify(NextLoop::Immediately);
39    }
40}
41
42impl Handler<NextLoop> for Looper {
43    type Result = ();
44
45    fn handle(&mut self, msg: NextLoop, ctx: &mut Self::Context) {
46        if let NextLoop::Later(duration) = msg {
47            ctx.notify_later(NextLoop::Immediately, duration);
48            return;
49        }
50        self.task
51            .send(Task)
52            .into_actor(self)
53            .then(move |res, act, ctx2| {
54                ctx2.notify(match res {
55                    Ok(Some(duration)) => NextLoop::Later(duration),
56                    _ => NextLoop::Immediately,
57                });
58                async {}.into_actor(act)
59            })
60            .wait(ctx);
61    }
62}
63
64impl Handler<StopRequest> for Looper {
65    type Result = <StopRequest as Message>::Result;
66
67    fn handle(&mut self, _msg: StopRequest, ctx: &mut Self::Context) {
68        ctx.stop();
69    }
70}
actix_daemon_utils/looper.rs

actix_daemon_utils/
looper.rs
