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pub use lapin; use lapin::{Connection, ConnectionProperties, ConnectionState, Error as LapinError}; pub use mobc; use mobc::async_trait; use mobc::Manager; /// A `mobc::Manager` for `lapin::Connection`s. /// /// ## Example /// /// ```no_run /// use mobc::Pool; /// use mobc_lapin::RMQConnectionManager; /// use tokio_amqp::*; /// use futures::StreamExt; /// use std::time::Duration; /// use lapin::{ /// options::*, types::FieldTable, BasicProperties, publisher_confirm::Confirmation, /// ConnectionProperties, /// }; /// /// const PAYLOAD: &[u8;13] = b"Hello, World!"; /// const QUEUE_NAME: &str = "test"; /// /// #[tokio::main] /// async fn main() { /// let addr = "amqp://rmq:rmq@127.0.0.1:5672/%2f"; /// let manager =RMQConnectionManager::new(addr.to_owned(), ConnectionProperties::default().with_tokio()); /// let pool = Pool::<RMQConnectionManager>::builder() /// .max_open(5) /// .build(manager); /// /// let conn = pool.get().await.unwrap(); /// let channel = conn.create_channel().await.unwrap(); /// let _ = channel /// .queue_declare( /// QUEUE_NAME, /// QueueDeclareOptions::default(), /// FieldTable::default(), /// ) /// .await.unwrap(); /// /// // send messages to the queue /// println!("spawning senders..."); /// for i in 0..50 { /// let send_pool = pool.clone(); /// let send_props = BasicProperties::default().with_kind(format!("Sender: {}", i).into()); /// tokio::spawn(async move { /// let mut interval = tokio::time::interval(Duration::from_millis(200)); /// loop { /// interval.tick().await; /// let send_conn = send_pool.get().await.unwrap(); /// let send_channel = send_conn.create_channel().await.unwrap(); /// let confirm = send_channel /// .basic_publish( /// "", /// QUEUE_NAME, /// BasicPublishOptions::default(), /// PAYLOAD.to_vec(), /// send_props.clone(), /// ) /// .await.unwrap() /// .await.unwrap(); /// assert_eq!(confirm, Confirmation::NotRequested); /// } /// /// }); /// } /// /// // listen for incoming messages from the queue /// let mut consumer = channel /// .basic_consume( /// QUEUE_NAME, /// "my_consumer", /// BasicConsumeOptions::default(), /// FieldTable::default(), /// ) /// .await.unwrap(); /// /// println!("listening to messages..."); /// while let Some(delivery) = consumer.next().await { /// let (channel, delivery) = delivery.expect("error in consumer"); /// println!("incoming message from: {:?}", delivery.properties.kind()); /// channel /// .basic_ack(delivery.delivery_tag, BasicAckOptions::default()) /// .await /// .expect("ack"); /// } /// } /// ``` #[derive(Clone, Debug)] pub struct RMQConnectionManager { addr: String, connection_properties: ConnectionProperties, } impl RMQConnectionManager { pub fn new(addr: String, connection_properties: ConnectionProperties) -> Self { Self { addr, connection_properties, } } } #[async_trait] impl Manager for RMQConnectionManager { type Connection = Connection; type Error = LapinError; async fn connect(&self) -> Result<Self::Connection, Self::Error> { let c = Connection::connect(self.addr.as_str(), self.connection_properties.clone()).await?; Ok(c) } async fn check(&self, conn: Self::Connection) -> Result<Self::Connection, Self::Error> { match conn.status().state() { ConnectionState::Connected => Ok(conn), other_state => Err(LapinError::InvalidConnectionState(other_state)), } } }