基于插件实现RabbitMQ“延时队列“-编程知识

基于插件实现RabbitMQ“延时队列“

1.官网下载

在添加链接描述下载rabbitmq_delayed_message_exchange 插件,本文以v3.10.0为例
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1.1.上传安装包

scp /Users/hong/资料/rabbitmq_delayed_message_exchange-3.10.0.ez  root@10.211.55.4:/usr/local/software

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1.2.将文件移入RabbitMQ的安装目录下的plugins目录

mv rabbitmq_delayed_message_exchange-3.10.0.ez /usr/local/software/rabbitmq_server-3.10.0/plugins

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1.3.安装插件

rabbitmq-plugins enable rabbitmq_delayed_message_exchange

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1.4 重启后验证

rabbitmq-server start

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2.两种实现方式图解

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3.基于插件的延迟队列配置类

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package com.hong.springboot.rabbitmq.config;import org.springframework.amqp.core.*;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;import java.util.HashMap;
import java.util.Map;/*** @Description: 延迟队列配置类* @Author: hong* @Date: 2024-02-25 20:19* @Version: 1.0**/
@Configuration
public class DelayedQueueConfig {public static final String DELAYED_QUEUE_NAME = "delayed.queue";public static final String DELAYED_EXCHANGE_NAME = "delayed.exchange";public static final String DELAYED_ROUTING_KEY = "delayed.routingKey";/*** 基于延迟插件声明自定义交换机* @return*/@Beanpublic CustomExchange delayedExchange(){Map<String,Object> map = new HashMap<>();map.put("x-delayed-type","direct");/*** 声明自定义交换机* 第1个参数:交换机名称* 第2个参数:交换机类型* 第3个参数:是否需要持久化* 第4个参数:是否需要自动删除* 第5个参数:其他参数*/return new CustomExchange(DELAYED_EXCHANGE_NAME,"x-delayed-message",true,false,map);}@Beanpublic Queue delayedQueue(){return  new Queue(DELAYED_QUEUE_NAME);}@Beanpublic Binding delayedQueueBindingDelayedExchange(@Qualifier("delayedQueue") Queue delayedQueue,@Qualifier("delayedExchange") CustomExchange delayedExchange) {return BindingBuilder.bind(delayedQueue).to(delayedExchange).with(DELAYED_ROUTING_KEY).noargs();}
}

4.生产者发送消息

    /*** 基于延迟插件的发送消息* @param message* @param delayTime 延迟时间*/@GetMapping("sendDelayMsg/{message}/{delayTime}")public void sendMsg(@PathVariable String message, @PathVariable Integer delayTime) {rabbitTemplate.convertAndSend(DelayedQueueConfig.DELAYED_EXCHANGE_NAME, DelayedQueueConfig.DELAYED_ROUTING_KEY, message, correlationData -> {correlationData.getMessageProperties().setDelay(delayTime);return correlationData;});log.info("当前时间：{},发送一条时长{}毫秒TTL信息给延迟队列delayed.queue:{}", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) , delayTime, message);}

5.消费者端代码

package com.hong.springboot.rabbitmq.consumer;import com.hong.springboot.rabbitmq.config.DelayedQueueConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;import java.text.SimpleDateFormat;
import java.util.Date;/*** @Description: 基于延迟插件的延迟消费者* @Author: hong* @Date: 2024-02-25 21:27* @Version: 1.0**/
@Slf4j
@Component
public class DelayQueueConsumer {@RabbitListener(queues = DelayedQueueConfig.DELAYED_QUEUE_NAME)public void receiveDelayMessage(Message message){String msg = new String(message.getBody());log.info("当前时间：{},收到延迟队列信息{}",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) , msg);}
}

http://localhost:8080/ttl/sendDelayMsg/hello rabbitmq 1/20000
http://localhost:8080/ttl/sendDelayMsg/hello rabbitmq 2/2000
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基于插件的延迟与基于死信队列的结果恰好相反更符合预期,因此在实际项目中通常采用延迟插件方式来实现rabbitMQ的延迟队列