rabbitmq使用死信队列做延迟消息

 创建队列  交换机  和绑定关系

package com.test.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.Exchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Yang Kai
 * @create 2023/1/3 10:00
 */
@Configuration
public class MyMQConfig {
    /**
     * 用@Bean方式创建，如果rabbitMQ服务器没有这些的话，容器中的 Queue   Exchange  Binding 都会连上rabbitMQ服务器自动创建
     *
     * @return
     */
    //队列
    @Bean
    public Queue orderDelayQueue() {
        /**
         * 死信队列的属性
         * X-dead-letter-exchange: order-event-exchange
         * X-dead-letter-routing-key: order.release.order
         * X-message-ttl: 60000
         */
        Map arguments = new HashMap<>();
        //指定交换机
        arguments.put("x-dead-letter-exchange", "order-event-exchange");
        //死信路由
        arguments.put("x-dead-letter-routing-key", "order.release.order");
        //死信的存活时间
        arguments.put("x-message-ttl", 60000);
        //String name, boolean durable, boolean exclusive, boolean autoDelete, @Nullable Map arguments
        Queue queue = new Queue("order.delay.queue", true, false, false, arguments);
        return queue;
    }

    //队列
    @Bean
    public Queue orderReleaseOrderQueue() {
        return new Queue("order.release.order.queue", true, false, false);
    }

    //交换机
    @Bean
    public Exchange orderEventExchange() {
        //String name, boolean durable, boolean autoDelete, Map arguments
        return new TopicExchange("order-event-exchange", true, false);
    }

    //绑定关系
    @Bean
    public Binding orderCreateOrderBinding() {
        //String destination, Binding.DestinationType destinationType, String exchange, String routingKey, @Nullable Map arguments

        Binding binding = new Binding("order.delay.queue", //目标队列
                Binding.DestinationType.QUEUE,
                "order-event-exchange",//交换机
                "order.create.order",//队列和交换机绑定的路由
                null);
        return binding;
    }

    //绑定关系
    @Bean
    public Binding orderReleaseOrderQueueBinding() {
        Binding binding1 = new Binding("order.release.order.queue", //目标队列
                Binding.DestinationType.QUEUE,
                "order-event-exchange",//交换机
                "order.release.order",//队列和交换机绑定的路由
                null);
        return binding1;
    }
}

监听被死信队列过期的消息投递到正常队列的队

//监听正常队列，这个队列是被死信队列过期后投递的队列
    @RabbitListener(queues = "order.release.order.queue")
    public void listener(Message message, Student student, Channel channel, @Header(AmqpHeaders.DELIVERY_TAG) long deliveryTag) throws IOException {
        System.out.println("message:"+message);
        MessageProperties messageProperties = message.getMessageProperties();
        long tag = deliveryTag;
        Map headers = messageProperties.getHeaders();
        String messageId = headers.get("spring_returned_message_correlation").toString();
        System.out.println("message_id: "+messageId);
        if(stringRedisTemplate.opsForHash().entries("rabbitmq_log").containsKey(messageId)){
            //redis中包含该key,说明已经被消费过了
            System.out.println(messageId+"消息已经被消费过一次");
            //确认消息已被消费
            channel.basicAck(tag,false);
            return;
        }
        try {
            Date date = new Date();
            System.out.println("接收到死信队列的消息 = " + student);
            System.out.println("时间 = ：" + date);
            stringRedisTemplate.opsForHash().put("rabbitmq_log",messageId,"v");
            channel.basicAck(tag,false);
            System.out.println(messageId+"消息消费成");
        }catch (Exception e){
            e.printStackTrace();
            System.out.println("消息消费异常");
            channel.basicNack(tag,false,true);
        }
    }

发送消息

   //测试死信队列
    @Test
    public void contextLoadsxx() {
        String msgId = UUID.randomUUID().toString();
        System.out.println("1msgId:"+msgId);
        RabbitmqSendLog rabbitmqSendLog = new RabbitmqSendLog();
        rabbitmqSendLog.setMessageId(msgId);
        rabbitmqSendLog.setExchange("exchange-directs-user");
        rabbitmqSendLog.setRouteKey("route.user");
        rabbitmqSendLog.setCount(1);
        rabbitmqSendLog.setStatus(0);
        //1分钟后重试的时间
        rabbitmqSendLog.setTryTime(new Date(System.currentTimeMillis()+1000+60+1));
        Student student = new Student();
        student.setAddress("杭州1");
        student.setAge("112");
        student.setName("小明");
        String s = JSON.toJSONString(student);
        rabbitmqSendLog.setContent(s);
        int insert = rabbitmqSendLogMapper.insert(rabbitmqSendLog);
        try {
            rabbitTemplate.convertAndSend("order-event-exchange", "order.create.order", student,new CorrelationData(msgId));
        }catch (Exception e){
            //如果mq网络原因.发送邮件,活着其他方式通知
//            rabbitmqSendLogMapper.insert(rabbitmqSendLog);
        }

    }

发送时间

 收到消息时间