RabbitMQ实现死信队列

当一个队列的消息发送出现异常的时候，需要设置一个死信队列，将失败的消息放置死信队列，进行人工干预

rabbitMQ的配置文件：

spring:
  rabbitmq:
    virtual-host: /
    addresses: localhost
    username: guest
    password: guest
    port: 5672
  application:
    name: consumer-01
           

rabbitMQ的队列设置：

package com.example.consumer01.config;

import org.springframework.amqp.core.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author liyunxing
 * @package com.example.consumer01.config
 * @code
 * @description:
 * @since 2019/4/25 9:42
 */
@Configuration
public class RabbitConfig {

    //死信交换机
    public static final String X_DEAD_LETTER_EXCHANGE = "x-dead-letter-exchange";
    //死信路由
    public static final String X_DEAD_LETTER_ROUTING_KEY = "x-dead-letter-routing-key";
    //死信队列
    public static final String DEAD_QUEUE = "dead-queue";

    //普通交换机
    public static final String NORMAL_EXCHANGE = "normal-exchange";
    //普通路由
    public static final String NORMAL_ROUTING_KEY = "normal-routing-key";
    //普通队列
    public static final String NORMAL_QUEUE = "normal-queue";

    /**
     * 创建死信队列
     */
    @Bean
    public Queue getDeadQueue(){
        return new Queue(DEAD_QUEUE);
    }
    //创建死信交换机
    @Bean
    public Exchange getDeadExchange(){
        return ExchangeBuilder.directExchange(X_DEAD_LETTER_EXCHANGE).durable(true).build();
    }
    //队列与延时交换机进行绑定
    @Bean
    public Binding bindDead(){
        return BindingBuilder.bind(getDeadQueue()).to(getDeadExchange()).with(X_DEAD_LETTER_ROUTING_KEY).noargs();
    }

    //创建普通队列
    @Bean
    public Queue getNormalQueue(){
        Map args = new HashMap();
        //当消息发送异常的时候，消息需要路由到的交换机和routing-key，这里配的直接是发送至死信队列
        args.put("x-dead-letter-exchange",X_DEAD_LETTER_EXCHANGE);
        args.put("x-dead-letter-routing-key",X_DEAD_LETTER_ROUTING_KEY);
        //创建队列的时候，将死信绑定到队列中
        return QueueBuilder.durable(NORMAL_QUEUE).withArguments(args).build();
    }
    //创建普通交换机
    @Bean
    public Exchange getNormalExchange(){
        return ExchangeBuilder.directExchange(NORMAL_EXCHANGE).durable(true).build();
    }
    //普通队列与普通交换机进行绑定
    @Bean
    public Binding bindNormal(){
        return BindingBuilder.bind(getNormalQueue()).to(getNormalExchange()).with(NORMAL_ROUTING_KEY).noargs();
    }
}
           

RabbitMQ的监听：

package com.example.consumer01.rabbit;

import com.example.consumer01.config.RabbitConfig;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * @author liyunxing
 * @package com.example.consumer01.rabbit
 * @code
 * @description:
 * @since 2019/4/25 9:43
 */
@Component
public class Consumer01 {

    //监听死信队列
    @RabbitListener(queues = {RabbitConfig.DEAD_QUEUE})
    public void receiver(String msg){
        System.out.println("dead queue 收到消息>>>>>>>>>"+msg);
    }
}

           

RabbitMQ的生产者：

package com.example.consumer01;

import com.example.consumer01.config.RabbitConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class Consumer01ApplicationTests {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Test
    public void contextLoads() {
        String msg = "hello world";
        /**
         * 发送给普通对队列,设置五秒之后过期
         * 但是并没有实现消费的监听，因此该消息将在五秒之后过期
         */
        rabbitTemplate.convertAndSend(RabbitConfig.NORMAL_EXCHANGE,RabbitConfig.NORMAL_ROUTING_KEY,msg,message -> {
            message.getMessageProperties().setExpiration("5000");
            return message;
        });
    }
}