CleverCloud / Lapin

A Rust AMQP client library.

This project follows the AMQP 0.9.1 specifications, targeting especially RabbitMQ.

Feature switches

• codegen: generate code instead of using pregenerated one
• native-tls (default): enable amqps support through native-tls
• openssl: enable amqps support through openssl (preferred over native-tls when set)
• rustls: enable amqps support through rustls (preferred over openssl when set, uses rustls-native-certs by default)
• rustls-native-certs: same as rustls, be ensure we'll still use rustls-native-certs even if the default for rustls changes
• rustls-webpki-roots-certs: same as rustls but using webkit-roots instead of rustls-native-certs

Integration with async-io

Integration with async-io is provided by the async-lapin crate.

Integration with async-std

Integration with async-std is provided by the async-amqp crate.

Integration with bastion

Integration with bastion is provided by the bastion-amqp crate.

Integration with smol

Integration with smol is provided by the lapinou crate.

Integration with tokio

Integration with tokio is provided by the tokio-amqp crate.

Example

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

fn main() -> Result<()> {
    if std::env::var("RUST_LOG").is_err() {
        std::env::set_var("RUST_LOG", "info");
    }

    tracing_subscriber::fmt::init();

    let addr = std::env::var("AMQP_ADDR").unwrap_or_else(|_| "amqp://127.0.0.1:5672/%2f".into());

    async_global_executor::block_on(async {
        let conn = Connection::connect(
            &addr,
            ConnectionProperties::default(),
        )
        .await?;

        info!("CONNECTED");

        let channel_a = conn.create_channel().await?;
        let channel_b = conn.create_channel().await?;

        let queue = channel_a
            .queue_declare(
                "hello",
                QueueDeclareOptions::default(),
                FieldTable::default(),
            )
            .await?;

        info!(?queue, "Declared queue");

        let mut consumer = channel_b
            .basic_consume(
                "hello",
                "my_consumer",
                BasicConsumeOptions::default(),
                FieldTable::default(),
            )
            .await?;
        async_global_executor::spawn(async move {
            info!("will consume");
            while let Some(delivery) = consumer.next().await {
                let delivery = delivery.expect("error in consumer");
                delivery
                    .ack(BasicAckOptions::default())
                    .await
                    .expect("ack");
            }
        }).detach();

        let payload = b"Hello world!";

        loop {
            let confirm = channel_a
                .basic_publish(
                    "",
                    "hello",
                    BasicPublishOptions::default(),
                    payload.to_vec(),
                    BasicProperties::default(),
                )
                .await?
                .await?;
            assert_eq!(confirm, Confirmation::NotRequested);
        }
    })
}