yaaf 0.2.0

Yet Another Actor Framework
Documentation 
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use crate::{
    actor::{Actor, ActorId},
    context::Context,
    error::YaafInternalError,
    handler::Handler,
    message::Message,
    router::{ConcreteRouter, Router, SysRouter, SystemMessage},
};
use ::std::{any::TypeId, collections::HashMap, sync::Arc};
use ::tokio::{
    select, spawn,
    sync::mpsc::{channel, unbounded_channel, Receiver, Sender, UnboundedReceiver},
    sync::Mutex,
};

pub(crate) struct Mailbox<A: Actor + Handler<M>, M: Message> {
    context: Context<A>,
    done: Sender<()>,
    handler: Arc<Mutex<A>>,
    recv: UnboundedReceiver<M>,
    sys_recv: UnboundedReceiver<SystemMessage>,
}

impl<A: 'static + Actor + Handler<M>, M: Message> Mailbox<A, M> {
    pub(crate) async fn start(
        actor: Arc<Mutex<A>>,
        actor_id: ActorId,
        sys_router: &SysRouter,
        router: &ConcreteRouter<M>,
        publish_routers: HashMap<TypeId, Arc<dyn Router>>,
    ) -> Result<Receiver<()>, YaafInternalError> {
        let (sys_send, sys_recv) = unbounded_channel();
        sys_router
            .subscribe(None, sys_send)
            .await
            .map_err(|source| YaafInternalError::MailboxSystemSubscribeFailure {
                source: source.into(),
            })?;

        let (send, recv) = unbounded_channel();
        router
            .subscribe(Some(actor_id), send)
            .await
            .map_err(|source| YaafInternalError::MailboxSubscribeFailure {
                source: source.into(),
            })?;
        let (done, result) = channel(1);

        let context = Context::new(publish_routers);
        let mailbox = Mailbox {
            context,
            done,
            handler: actor,
            recv,
            sys_recv,
        };

        spawn(mailbox.run());
        Ok(result)
    }

    async fn run(mut self) {
        loop {
            select! {
                received = self.sys_recv.recv() => {
                    match received {
                        Some(message) => {
                            match message {
                                SystemMessage::Shutdown => {
                                    // TODO: log the error
                                    let _ = self.done.send(()).await;
                                    break;
                                }
                            }
                        },
                        None => {},
                    }
                }
                received = self.recv.recv() => {
                    match received {
                        Some(message) => {
                            let mut guard = self.handler.lock().await;
                            guard.handle(&mut self.context, message).await;
                        },
                        None => {},
                    }
                }
            }
        }
    }
}