actix 0.7.3

Actor framework for Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

//! Example of sync actor. It can be used for cpu bound tasks. Only one sync
//! actor runs within arbiter's thread. Sync actor processes one message at a
//! time. Sync arbiter can start multiple threads with separate instance of
//! actor in each.

extern crate actix;
extern crate futures;
extern crate tokio;

use actix::prelude::*;

struct Fibonacci(pub u32);

impl Message for Fibonacci {
    type Result = Result<u64, ()>;
}

struct SyncActor;

impl Actor for SyncActor {
    type Context = SyncContext<Self>;
}

impl Handler<Fibonacci> for SyncActor {
    type Result = Result<u64, ()>;

    fn handle(&mut self, msg: Fibonacci, _: &mut Self::Context) -> Self::Result {
        if msg.0 == 0 {
            Err(())
        } else if msg.0 == 1 {
            Ok(1)
        } else {
            let mut i = 0;
            let mut sum = 0;
            let mut last = 0;
            let mut curr = 1;
            while i < msg.0 - 1 {
                sum = last + curr;
                last = curr;
                curr = sum;
                i += 1;
            }
            Ok(sum)
        }
    }
}

fn main() {
    System::run(|| {
        // start sync arbiter with 3 threads
        let addr = SyncArbiter::start(3, || SyncActor);

        // send 5 messages
        for n in 5..10 {
            addr.do_send(Fibonacci(n));
        }

        tokio::spawn(futures::lazy(|| {
            System::current().stop();
            futures::future::result(Ok(()))
        }));
    });
}