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
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

//! Timers object for planning messages sending.
//!
//! This object is intermediate code for interact with scheduler of actor system . He presents
//! abstractions, for send a messages with delay and periodically through interval. For more
//! details, see the module level doc, section Timers.

use crate::common::tsafe::TSafe;
use crate::actors::abstract_actor_system::AbstractActorSystem;
use crate::actors::message::Message;
use crate::actors::scheduler::TaskGuard;
use crate::actors::abstract_actor_ref::ActorRef;
use std::collections::HashMap;
use std::time::Duration;
use std::sync::mpsc::channel;

pub type Timers = Box<AbstractTimers + Send>;

pub trait AbstractTimers {
    fn start_single(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, delay: Duration, msg: Message);
    fn start_periodic(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, interval: Duration, msg: Box<'static + Fn() -> Message + Send>);
    fn cancel(&mut self, key: u32);
    fn cancel_all(&mut self);
}

pub struct RealTimers {
    system: TSafe<AbstractActorSystem + Send>,
    tasks: HashMap<u32, TaskGuard>
}

impl RealTimers {
    pub fn new(system: TSafe<AbstractActorSystem + Send>) -> Timers {
        let r = RealTimers {
            system,
            tasks: HashMap::new()
        };

        Box::new(r)
    }
}

impl AbstractTimers for RealTimers {

    /// Starts single timer task. Accept as args - key, refs to self and receiver of message, delay
    /// and message for send. For example see module level doc or example actor in the examples
    /// module.
    fn start_single(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, delay: Duration, msg: Message)
    {
        let (msg_sender, msg_receiver) = channel();
        let (self_sender, self_receiver) = channel();
        let (to_sender, to_receiver) = channel();


        let scheduler = self.system.lock().unwrap().get_scheduler();
        let guard = scheduler.lock().unwrap().schedule_once(delay,move || {
            let msg = msg_receiver.recv().unwrap();
            let self_ = self_receiver.recv().unwrap();
            let mut to: ActorRef = to_receiver.recv().unwrap();

            to.tell(msg, Some(&self_));
        });

        self.tasks.insert(key, guard);

        msg_sender.send(msg);
        self_sender.send((*self_).clone());
        to_sender.send((*to).clone());
    }

    /// Starts single timer task. Accept as args - key, refs to self and receiver of message, delay
    /// and closure which produce a message for send. For example see the module level doc or
    /// example actor in the examples module.
    fn start_periodic(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, interval: Duration, msg: Box<'static + Fn() -> Message + Send>)
    {
        let (msg_sender, msg_receiver) = channel();
        let (self_sender, self_receiver) = channel();
        let (to_sender, to_receiver) = channel();

        let msg_sender_clone = msg_sender.clone();
        let self_sender_clone = self_sender.clone();
        let to_sender_clone = to_sender.clone();

        let scheduler = self.system.lock().unwrap().get_scheduler();
        let guard = scheduler.lock().unwrap().schedule_periodic(interval,move || {
            let msg: Box<'static + Fn() -> Message + Send> = msg_receiver.recv().unwrap();
            let self_: ActorRef = self_receiver.recv().unwrap();
            let mut to: ActorRef = to_receiver.recv().unwrap();

            to.tell(msg(), Some(&self_));

            msg_sender_clone.send(msg);
            self_sender_clone.send(self_);
            to_sender_clone.send(to);
        });

        self.tasks.insert(key, guard);

        msg_sender.send(msg);
        self_sender.send((*self_).clone());
        to_sender.send((*to).clone());
    }

    /// Cancel timer by it's key
    fn cancel(&mut self, key: u32) {
        self.tasks.remove(&key);
    }

    /// Cancels all timers
    fn cancel_all(&mut self) {
        self.tasks.clear();
    }
}

pub struct StubTimers {}

impl StubTimers {
    pub fn new() -> Timers {
        Box::new(StubTimers {})
    }
}

impl AbstractTimers for StubTimers {
    fn start_single(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, delay: Duration, msg: Message) {
        unimplemented!()
    }

    fn start_periodic(&mut self, key: u32, self_: &ActorRef, to: &ActorRef, interval: Duration, msg: Box<'static + Fn() -> Message + Send>)
    {
        unimplemented!()
    }

    fn cancel(&mut self, key: u32) {}

    fn cancel_all(&mut self) {}
}