RabbitMQ高级特性-TTL队列/消息

TTL

time to live,即生存时间

RabbitMQ 支持消息的过时时间，能够在发消息是指定

RabbitMQ 支持队列的过时时间，从消息入队开始计算，只要超过了队列的超时时间配置，那么消息会自动清除

代码

package com.wyg.rabbitmq.javaclient.ttl;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

/**
 * ttl队列/消息
 * 
 * @author wyg0405@gmail.com
 * @date 2019-11-22 13:25
 * @since JDK1.8
 * @version V1.0
 */

public class Producer {
    private static final String HOST = "localhost";
    private static final int PORT = 5672;
    private static final String USERNAME = "guset";
    private static final String PASSWORD = "guset";

    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(HOST);
        factory.setVirtualHost("/");
        factory.setPort(PORT);
        factory.setUsername(USERNAME);
        factory.setPassword(PASSWORD);
        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();
        String exchangeName = "test_ttl_exchange";
        String routingKey = "ttl.abc";
        String queueName = "test_ttl_queue";

        // 申明exchange
        channel.exchangeDeclare(exchangeName, "topic");
        // 申明 queue
        channel.queueDeclare(queueName, true, false, false, null);

        Map<String, Object> arguments = new HashMap<>();
        // 队列ttl，设置为8s
        arguments.put("message-ttl", 8000);
        channel.queueBind(queueName, exchangeName, routingKey, arguments);

        for (int i = 0; i < 3; i++) {
            // expiration("10000") 设置消息8s过时,消息的ttl
            AMQP.BasicProperties props = new AMQP.BasicProperties.Builder().deliveryMode(2).contentEncoding("UTF-8")
                .expiration("8000").build();

            String msg = "这是第" + i + "条ack消息";
            try {
                TimeUnit.SECONDS.sleep(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            channel.basicPublish(exchangeName, routingKey, false, props, msg.getBytes("UTF-8"));
        }

        channel.close();
        connection.close();
    }

}

运行结果(动图)，观察管理控制台，到期自动清除