messagebus/examples/demo_batch.rs

use std::sync::Arc;

use async_trait::async_trait;
use messagebus::{error, AsyncBatchHandler, BatchHandler, Bus, Message};
use thiserror::Error;

#[derive(Debug, Error, Clone)]
enum Error {
    #[error("Error({0})")]
    Error(Arc<anyhow::Error>),
}

impl<M: Message> From<error::Error<M>> for Error {
    fn from(err: error::Error<M>) -> Self {
        Self::Error(Arc::new(err.into()))
    }
}
struct TmpReceiver;

#[async_trait]
impl AsyncBatchHandler<i32> for TmpReceiver {
    type Error = Error;
    type Response = ();
    type InBatch = Vec<i32>;
    type OutBatch = Vec<()>;

    async fn handle(&self, msg: Vec<i32>, _bus: &Bus) -> Result<Vec<Self::Response>, Self::Error> {
        println!("---> [i32; {}] {:?}", msg.len(), msg);

        Ok(vec![])
    }
}

impl BatchHandler<i16> for TmpReceiver {
    type Error = Error;
    type Response = ();
    type InBatch = Vec<i16>;
    type OutBatch = Vec<()>;

    fn handle(&self, msg: Vec<i16>, _bus: &Bus) -> Result<Vec<Self::Response>, Self::Error> {
        println!("---> [i16; {}] {:?}", msg.len(), msg);
        Ok(vec![])
    }
}

#[tokio::main]
async fn main() {
    let (b, poller) = Bus::build()
        .register(TmpReceiver)
            .subscribe_batch_async::<i32>(16, Default::default())
            .subscribe_batch_sync::<i16>(16, Default::default())
        .done()
        .build();

    for i in 1..100i32 {
        b.send(i).await.unwrap();
    }

    b.send(1i16).await.unwrap();
    b.send(2i16).await.unwrap();
    b.send(3i16).await.unwrap();
    b.send(4i16).await.unwrap();
    b.send(5i16).await.unwrap();
    b.send(6i16).await.unwrap();
    b.send(7i16).await.unwrap();

    println!("flush");
    b.flush().await;

    println!("close");
    b.close().await;

    println!("closed");

    poller.await;
    println!("[done]");
}