cmq 0.0.1

Composable Message Queue
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

pub mod agent;

use crate::pubsub::registrar::Registrar;
use crate::pubsub::{PubEvent, PubSub, SubId};
use agent::PubAgent;
use anyhow::{Error, Result};
use crb::agent::Address;
use crb::superagent::{Drainer, InteractExt};
use derive_more::{Deref, DerefMut};
use std::sync::Arc;

#[derive(Deref, DerefMut)]
pub struct Pub<T: PubSub> {
    inner: Arc<T::Publisher>,
}

impl<T: PubSub> Clone for Pub<T> {
    fn clone(&self) -> Self {
        Self {
            inner: self.inner.clone(),
        }
    }
}

impl<T: PubSub> Pub<T> {
    pub fn new(state: T) -> Self {
        let agent = PubAgent::new(state);
        let registrar = Registrar::link();
        let agent = registrar.spawn_pub(agent);
        let pub_inner = PubInner { agent };
        let publisher = T::Publisher::from(pub_inner);
        let inner = Arc::new(publisher);
        Self { inner }
    }

    pub async fn events(&mut self) -> Result<Drainer<PubEvent<T>>> {
        let request = agent::GetEvents::new();
        self.interact(request).await.map_err(Error::from)
    }

    pub fn broadcast(&self, delta: T::Delta) -> Result<()> {
        let delta = agent::Dispatch::new(None, delta);
        self.event(delta)
    }

    pub fn direct(&self, sub_id: SubId, delta: T::Delta) -> Result<()> {
        let delta = agent::Dispatch::new(Some(sub_id), delta);
        self.event(delta)
    }
}

#[derive(Deref, DerefMut)]
pub struct PubInner<T: PubSub> {
    agent: Address<PubAgent<T>>,
}