SpringBoot+RabbitMQ 实现死信队列的示例

spring.application.name=spring-boot-rabbitmq

spring.rabbitmq.host=127.0.0.1
spring.rabbitmq.port=5672
spring.rabbitmq.username=admin
spring.rabbitmq.password=admin
#手动模式
spring.rabbitmq.listener.simple.acknowledge-mode=manual

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/**
 * @author wxd
 * @version V1.0
 * @description DeadConfig
 * @date 2022/6/13 13:55
 **/
@Configuration
public class DeadConfig {

    /* 正常配置 **********************************************************************************************************/

    /**
     * 正常交换机，开启持久化
     */
    @Bean
    DirectExchange normalExchange() {
        return new DirectExchange("normalExchange", true, false);
    }

    @Bean
    public Queue normalQueue() {
        // durable: 是否持久化,默认是false,持久化队列：会被存储在磁盘上，当消息代理重启时仍然存在，暂存队列：当前连接有效
        // exclusive: 默认也是false，只能被当前创建的连接使用，而且当连接关闭后队列即被删除。此参考优先级高于durable
        // autoDelete: 是否自动删除，当没有生产者或者消费者使用此队列，该队列会自动删除。
        Map<String, Object> args = deadQueueArgs();
        // 队列设置最大长度
        args.put("x-max-length", 5);
        return new Queue("normalQueue", true, false, false, args);
    }

    @Bean
    public Queue ttlQueue() {
        Map<String, Object> args = deadQueueArgs();
        // 队列设置消息过期时间 60 秒
        args.put("x-message-ttl", 60 * 1000);
        return new Queue("ttlQueue", true, false, false, args);
    }

    @Bean
    Binding normalRouteBinding() {
        return BindingBuilder.bind(normalQueue()).to(normalExchange()).with("normalRouting");
    }

    @Bean
    Binding ttlRouteBinding() {
        return BindingBuilder.bind(ttlQueue()).to(normalExchange()).with("ttlRouting");
    }

    /* 死信配置 **********************************************************************************************************/

    /**
     * 死信交换机
     */
    @Bean
    DirectExchange deadExchange() {
        return new DirectExchange("deadExchange", true, false);
    }

    /**
     * 死信队列
     */
    @Bean
    public Queue deadQueue() {
        return new Queue("deadQueue", true, false, false);
    }

    @Bean
    Binding deadRouteBinding() {
        return BindingBuilder.bind(deadQueue()).to(deadExchange()).with("deadRouting");
    }

    /**
     * 转发到 死信队列，配置参数
     */
    private Map<String, Object> deadQueueArgs() {
        Map<String, Object> map = new HashMap<>();
        // 绑定该队列到私信交换机
        map.put("x-dead-letter-exchange", "deadExchange");
        map.put("x-dead-letter-routing-key", "deadRouting");
        return map;
    }

package com.wxd.controller;

import com.alibaba.fastjson.JSONObject;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

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

/**
 * @author wxd
 * @version V1.0
 * @description HelloController
 * @date 2022/6/13 13:59
 **/
@RestController
public class HelloController {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    /**
     * 正常消息队列，队列最大长度5
     */
    @GetMapping("/normalQueue")
    public String normalQueue() {

        Map<String, Object> map = new HashMap<>(2);
        map.put("messageId", String.valueOf(UUID.randomUUID()));
        map.put("data", System.currentTimeMillis()   ", 正常队列消息，最大长度 5");

        rabbitTemplate.convertAndSend("normalExchange", "normalRouting", map,  new CorrelationData());
        return JSONObject.toJSONString(map);
    }
}

    /**
     * 消息 TTL, time to live
     */
    @GetMapping("/ttlToDead")
    public String ttlToDead() {

        Map<String, Object> map = new HashMap<>();
        map.put("messageId", String.valueOf(UUID.randomUUID()));
        map.put("data", System.currentTimeMillis()   ", ttl队列消息");

        rabbitTemplate.convertAndSend("normalExchange", "ttlRouting", map, new CorrelationData());
        return JSONObject.toJSONString(map);
    }

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.Map;

/**
 * @author wxd
 * @version V1.0
 * @description DeadConsumer
 * @date 2022/6/13 14:56
 **/
@Component
@RabbitListener(queues = "deadQueue")
public class DeadConsumer {
    @RabbitHandler
    public void process(Map<String, Object> message, Channel channel, Message mqMsg) throws IOException {
        System.out.println("死信队列收到消息 : "   message.toString());
        channel.basicAck(mqMsg.getMessageProperties().getDeliveryTag(), false);
    }
}