stateroom-server 0.2.5

Actix server actor implementation of Stateroom services
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
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

use crate::messages::{MessageData, MessageFromClient, MessageFromServer};
use actix::{Actor, AsyncContext, Context, Handler, Message, Recipient, SpawnHandle};
use stateroom::{MessageRecipient, StateroomContext, StateroomService, StateroomServiceFactory};
use std::time::Duration;

pub struct ServiceActor<J: StateroomService + Send + Sync + 'static> {
    service: J,
    timer_handle: Option<SpawnHandle>,
}

struct SetTimer(u32);

impl Message for SetTimer {
    type Result = ();
}
struct TimerFinished;

impl Message for TimerFinished {
    type Result = ();
}

/// A [StateroomContext] implementation for [StateroomService]s hosted in the
/// context of a [ServiceActor].
#[derive(Clone)]
pub struct ServiceActorContext {
    set_timer_recipient: Recipient<SetTimer>,
    send_message_recipient: Recipient<MessageFromServer>,
}

impl ServiceActorContext {
    fn try_send(&self, message: MessageFromServer) {
        self.send_message_recipient.do_send(message);
    }
}

impl StateroomContext for ServiceActorContext {
    fn send_message(&self, recipient: impl Into<MessageRecipient>, message: &str) {
        self.try_send(MessageFromServer::new(
            recipient.into(),
            message.to_string(),
        ));
    }

    fn send_binary(&self, recipient: impl Into<MessageRecipient>, message: &[u8]) {
        self.try_send(MessageFromServer::new_binary(
            recipient.into(),
            message.to_vec(),
        ));
    }

    fn set_timer(&self, ms_delay: u32) {
        self.set_timer_recipient.do_send(SetTimer(ms_delay));
    }
}

impl<J: StateroomService + Send + Sync + 'static + Unpin> ServiceActor<J> {
    #[must_use]
    pub fn new(
        ctx: &Context<Self>,
        service_factory: impl StateroomServiceFactory<ServiceActorContext, Service = J>,
        recipient: Recipient<MessageFromServer>,
    ) -> Option<Self> {
        let host_context = ServiceActorContext {
            set_timer_recipient: ctx.address().recipient(),
            send_message_recipient: recipient,
        };

        let service = service_factory.build("", host_context).unwrap();

        Some(ServiceActor {
            service,
            timer_handle: None,
        })
    }
}

impl<J: StateroomService + Send + Sync + 'static + Unpin> Actor for ServiceActor<J> {
    type Context = Context<Self>;

    fn stopping(&mut self, _ctx: &mut Self::Context) -> actix::Running {
        tracing::info!("Shutting down service");
        actix::Running::Stop
    }
}

impl<J: StateroomService + Send + Sync + 'static + Unpin> Handler<MessageFromClient> for ServiceActor<J> {
    type Result = ();

    fn handle(&mut self, msg: MessageFromClient, _ctx: &mut Self::Context) -> Self::Result {
        match msg {
            MessageFromClient::Connect(u, _) => {
                self.service.connect(u);
            }
            MessageFromClient::Disconnect(u) => {
                self.service.disconnect(u);
            }
            MessageFromClient::Message { data, from_client } => match data {
                MessageData::Binary(bin) => self.service.binary(from_client, &bin),
                MessageData::String(st) => self.service.message(from_client, &st),
            },
        }
    }
}

impl<J: StateroomService + Send + Sync + 'static + Unpin> Handler<SetTimer> for ServiceActor<J> {
    type Result = ();

    fn handle(&mut self, SetTimer(duration_ms): SetTimer, ctx: &mut Self::Context) -> Self::Result {
        tracing::info!(%duration_ms, "Timer set");

        if let Some(timer_handle) = self.timer_handle.take() {
            ctx.cancel_future(timer_handle);
        }

        if duration_ms > 0 {
            let handle =
                ctx.notify_later(TimerFinished, Duration::from_millis(u64::from(duration_ms)));
            self.timer_handle = Some(handle);
        }
    }
}

impl<J: StateroomService + Send + Sync + 'static + Unpin> Handler<TimerFinished> for ServiceActor<J> {
    type Result = ();

    fn handle(&mut self, _: TimerFinished, _: &mut Self::Context) -> Self::Result {
        tracing::info!("Timer finished.");
        self.service.timer();
    }
}