实测：springboot和rabbitmq实现延迟队列

1.在springboot中引入依赖

    <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-amqpartifactId>
        dependency>

2.application.yaml配置 

spring:
 rabbitmq:
    host: 101.200.170.1
    listener:
      simple:
        acknowledge-mode: manual
        prefetch: 10
    password: abc
    port: 5672
    username: mq-u
    virtual-host: /

3. 交互  队列  死信队列  死信交换 的配置

package com.jeesite.modules.test.MQMange;

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

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

//Fanout 类型 发布订阅模式
@Component
public class FanoutConfig {

    /**
     * 定义死信队列相关信息
     */
    public final static String deadQueueName = "dead_queue";
    public final static String deadRoutingKey = "dead_routing_key";
    public final static String deadExchangeName = "dead_exchange";
    /**
     * 死信队列 交换机标识符
     */
    public static final String DEAD_LETTER_QUEUE_KEY = "x-dead-letter-exchange";
    /**
     * 死信队列交换机绑定键标识符
     */
    public static final String DEAD_LETTER_ROUTING_KEY = "x-dead-letter-routing-key";

    // 邮件队列
    private String FANOUT_EMAIL_QUEUE = "fanout_email_queue";

    // 短信队列
    private String FANOUT_SMS_QUEUE = "fanout_sms_queue";
    // fanout 交换机
    private String EXCHANGE_NAME = "fanoutExchange";

    // 1.定义邮件队列
    @Bean
    public Queue fanOutEamilQueue() {
        // 将普通队列绑定到死信队列交换机上  这是重点：将普通队列绑定到死信队列上要设置 普通队列的x-dead-letter-exchange=死信交换名称 
          和 x-dead-letter-routing-key=死信队列的routing-key，这样普通队列的消息过期才会进入到死信队列
        Map args = new HashMap<>(2);
        args.put(DEAD_LETTER_QUEUE_KEY, deadExchangeName);
        args.put(DEAD_LETTER_ROUTING_KEY, deadRoutingKey);
        Queue queue = new Queue(FANOUT_EMAIL_QUEUE, true, false, false, args);
        return queue;
    }

    // 2.定义短信队列
    @Bean
    public Queue fanOutSmsQueue() {
        return new Queue(FANOUT_SMS_QUEUE);
    }

    // 2.定义交换机
    @Bean
    FanoutExchange fanoutExchange() {
        return new FanoutExchange(EXCHANGE_NAME);
    }

    // 3.队列与交换机绑定邮件队列
    @Bean
    Binding bindingExchangeEamil(Queue fanOutEamilQueue, FanoutExchange fanoutExchange) {
        return BindingBuilder.bind(fanOutEamilQueue).to(fanoutExchange);
    }

    // 4.队列与交换机绑定短信队列
    @Bean
    Binding bindingExchangeSms(Queue fanOutSmsQueue, FanoutExchange fanoutExchange) {
        return BindingBuilder.bind(fanOutSmsQueue).to(fanoutExchange);
    }

    /**
     * 创建配置死信邮件队列
     *
     * @return
     */
    @Bean
    public Queue deadQueue() {
        Queue queue = new Queue(deadQueueName, true);
        return queue;
    }
    /*
     * 创建死信交换机
     */
    @Bean
    public DirectExchange deadExchange() {
        return new DirectExchange(deadExchangeName);
    }
    /*
     * 死信队列与死信交换机绑定，此处用到了死信的RoutingKey
     */
    @Bean
    public Binding bindingDeadExchange(Queue deadQueue, DirectExchange deadExchange) {
        return BindingBuilder.bind(deadQueue).to(deadExchange).with(deadRoutingKey);
    }

}

4.创建消息生产者（设置5秒后失效）

package com.jeesite.modules.test.MQMange;


import java.util.UUID;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageBuilder;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.alibaba.fastjson.JSONObject;

@Component
public class FanoutProducer {
    @Autowired
    private AmqpTemplate amqpTemplate;

    public void send(String queueName) {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("email", "[email protected]");
        jsonObject.put("timestamp", 0);
        String jsonString = jsonObject.toJSONString();
        System.out.println("生产者jsonString:" + jsonString);
        // 设置消息唯一id 保证每次重试消息id唯一
        Message message = MessageBuilder.withBody(jsonString.getBytes())
                .setContentType(MessageProperties.CONTENT_TYPE_JSON).setContentEncoding("utf-8")
                .setMessageId(UUID.randomUUID() + "").setExpiration("50000").build(); //消息id设置在请求头里面 用UUID做全局ID
        amqpTemplate.convertAndSend(queueName, message);
    }
}

View Code

5.创建死信队列的消费者

package com.jeesite.modules.test.MQMange;

import java.util.Map;

import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Headers;
import org.springframework.stereotype.Component;

import com.rabbitmq.client.Channel;

//死信队列
@Component
public class FanoutDeadEamilConsumer {

    @RabbitListener(queues = "dead_queue")
    public void process(Message message, @Headers Map headers, Channel channel) throws Exception {
        // 获取消息Id
        String messageId = message.getMessageProperties().getMessageId();
        String msg = new String(message.getBody(), "UTF-8");
        System.out.println("死信邮件消费者获取生产者消息msg:"+msg+",消息id"+messageId);
        // // 手动ack
        Long deliveryTag = (Long) headers.get(AmqpHeaders.DELIVERY_TAG);
        // 手动签收
        channel.basicAck(deliveryTag, false);

        System.out.println("执行结束....");
    }

}

View Code

6.在controller里调用生产消息的方法并指定队列名称

   @GetMapping("/put1")
    public Map start1(Long userId, Long seckillId){
        Map map = new HashMap<>();
        fanoutProducer.send("fanout_email_queue");
        map.put("ID",System.currentTimeMillis());
        return map;
    }

View Code

7. 5秒后控制台打印死信队列的消费日志

8.完