lapin 4.9.1

An async AMQP 0-9-1 client library for Rust, targeting RabbitMQ.

Lapin implements the AMQP 0-9-1 specification on top of an async I/O layer. It is runtime-agnostic: the same code works with tokio (default), smol, or async-global-executor.

For full API documentation see docs.rs/lapin.

Quick start

use futures_lite::stream::StreamExt;
use lapin::{
    options::*, types::FieldTable, BasicProperties, Connection,
    ConnectionProperties, Result,
};

#[tokio::main]
async fn main() -> Result<()> {
    let addr = std::env::var("AMQP_ADDR")
        .unwrap_or_else(|_| "amqp://127.0.0.1:5672/%2f".into());

    let conn = Connection::connect(&addr, ConnectionProperties::default()).await?;
    let channel = conn.create_channel().await?;

    channel
        .queue_declare("hello".into(), QueueDeclareOptions::durable(), FieldTable::default())
        .await?;

    channel
        .basic_publish(
            "".into(),
            "hello".into(),
            BasicPublishOptions::default(),
            b"Hello, world!",
            BasicProperties::default(),
        )
        .await?
        .await?;

    let mut consumer = channel
        .basic_consume(
            "hello".into(),
            "my_consumer".into(),
            BasicConsumeOptions::default(),
            FieldTable::default(),
        )
        .await?;

    while let Some(delivery) = consumer.next().await {
        let delivery = delivery?;
        delivery.ack(BasicAckOptions::default()).await?;
    }
    Ok(())
}

Automatic connection recovery

Pass .enable_auto_recover() in ConnectionProperties to have lapin automatically reconnect and replay exchanges, queues, bindings, and consumers after a network failure:

use lapin::ConnectionProperties;

let props = ConnectionProperties::default().enable_auto_recover();

After catching a recoverable error on a channel, call channel.wait_for_recovery(error).await to block until recovery is complete.

Feature flags

Async runtime (pick exactly one)

TLS backend (pick at most one)

Rustls certificate store (when rustls is active)

Rustls crypto provider (at least one required)

Miscellaneous

Custom runtimes

Lapin can use any runtime by supplying an async_rs::Runtime value:

use lapin::{Connection, ConnectionProperties, Result};

async fn connect_with_custom_runtime() -> Result<()> {
    let runtime = async_rs::Runtime::tokio_current();
    let conn = Connection::connect_with_runtime(
        "amqp://localhost",
        ConnectionProperties::default(),
        runtime,
    ).await?;
    drop(conn);
    Ok(())
}

See async-rs for available runtime wrappers.