actor-helper 0.3.0

Helper library for building actor systems
Documentation 
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use std::io;

use actor_helper::{Handle, act, act_ok};

// Public API
pub struct Counter {
    handle: Handle<CounterActor, io::Error>,
}

impl Default for Counter {
    fn default() -> Self {
        Self {
            handle: Handle::spawn(CounterActor { value: 0 }).0,
        }
    }
}

impl Counter {
    pub async fn increment(&self, by: i32) -> io::Result<()> {
        self.handle
            .call(act_ok!(actor => async move {
                actor.value += by;
            }))
            .await
    }

    pub async fn get(&self) -> io::Result<i32> {
        self.handle
            .call(act_ok!(actor => async move {
                actor.value
            }))
            .await
    }

    pub async fn set_positive(&self, value: i32) -> io::Result<()> {
        self.handle
            .call(act!(actor => async move {
                if value <= 0 {
                    Err(io::Error::other("Value must be positive"))
                } else {
                    actor.value = value;
                    Ok(())
                }
            }))
            .await
    }

    pub async fn stop(&self) {
        self.handle.shutdown();
        self.handle.wait_stopped().await;
    }
}

// Private actor implementation
struct CounterActor {
    value: i32,
}

#[async_std::main]
async fn main() -> io::Result<()> {
    let counter = Counter::default();

    counter.increment(5).await?;
    println!("Value: {}", counter.get().await?);

    counter.set_positive(10).await?;
    println!("Value: {}", counter.get().await?);

    counter.stop().await;

    assert_eq!(counter.handle.state(), actor_helper::ActorState::Stopped);

    Ok(())
}