RabbitMQ死信队列实战

ゞ浴缸里的玫瑰 2021-07-24 19:17 530阅读 0赞

**一 代码**

package com.rabbitmq.ttl;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.ConnectionFactory;
    import com.rabbitmq.client.MessageProperties;
    import com.rabbitmq.util.ConnectionUtils;
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.concurrent.TimeoutException;
    
    /**
    * 死信队列（路由键为rk的消息过期后被放置到死信队列）
    */
    public class DealQueue {
        private static final String IP_ADDRESS = "127.0.0.1";
        private static final int PORT = 5672;//RabbitMQ（AMQP） 服务端默认端口号为 5672
    
    
        public static void main(String[] args) throws IOException,
                TimeoutException {
    
            ConnectionFactory factory = new ConnectionFactory();
            factory.setHost(IP_ADDRESS);
            factory.setUsername("root");
            factory.setPassword("123456");
            Connection connection = factory.newConnection();
            Channel channel = connection.createChannel();
    
            channel.exchangeDeclare("exchange.dlx", "direct", true, false, null);
            channel.exchangeDeclare("exchange.normal", "fanout", true, false, null);
    
            Map<String, Object> arg = new HashMap<String, Object>(3);
            arg.put("x-message-ttl", 3000);
            arg.put("x-dead-letter-exchange", "exchange.dlx");
    
            channel.queueDeclare("queue.normal", false, false, false, arg);
            channel.queueBind("queue.normal", "exchange.normal", "");
    
            channel.queueDeclare("queue.dlx", false, false, false, null);
            channel.queueBind("queue.dlx", "exchange.dlx", "rk");
    
            String message = "delay message !";
    
            channel.basicPublish("exchange.normal", "rk", false,
                    MessageProperties.PERSISTENT_TEXT_PLAIN,
                    message.getBytes());
            ConnectionUtils.close(channel, connection);
        }
    }

**二 测试**

消息最终存于死信队列。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

**三 参考代码**

[https://github.com/cakin24/RabbitMQDemo/blob/master/src/main/java/com/rabbitmq/ttl/DealQueue.java][https_github.com_cakin24_RabbitMQDemo_blob_master_src_main_java_com_rabbitmq_ttl_DealQueue.java]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/dd749783ec3c4d9eae7387ea180a353a.png
[https_github.com_cakin24_RabbitMQDemo_blob_master_src_main_java_com_rabbitmq_ttl_DealQueue.java]: https://github.com/cakin24/RabbitMQDemo/blob/master/src/main/java/com/rabbitmq/ttl/DealQueue.java