springboot整合rabbitmq实现延迟队列

一、rabbitmq安装

使用dicker进行安装，点击查看

二、引入maven依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
    <version>2.5.15</version>
</dependency>

三、配置yml

spring:
  rabbitmq:
    host: localhost
    port: 5674
    username: admin
    password: 123456
    virtual-host: delayed_vhost # 创建对应的Virtual Hosts
    listener:
      simple:
        concurrency: 5
        prefetch: 10
        retry:
          enabled: true   # 允许消息消费失败的重试
          max-attempts: 3   # 消息最多消费次数3次
          initial-interval: 2000    # 消息多次消费的间隔2秒

四、RabbitmqConfig

package com.base.framework.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
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;


@Configuration
public class RabbitmqConfig {
    /**
     * 延时队列交换机
     * 注意这里的交换机类型：CustomExchange
     *
     * @return
     */
    @Bean
    public CustomExchange delayExchange() {
        Map<String, Object> args = new HashMap<>();
        args.put("x-delayed-type", "direct");
        //属性参数 交换机名称 交换机类型 是否持久化 是否自动删除 配置参数
        return new CustomExchange("delay_exchange", "x-delayed-message", true, false, args);
    }


    /**
     * 延时队列
     *
     * @return
     */
    @Bean
    public Queue delayQueue() {
        //属性参数 队列名称 是否持久化
        return new Queue("delay_queue", true);
    }

    /**
     * 给延时队列绑定交换机
     *
     * @return
     */
    @Bean
    public Binding cfgDelayBinding() {
        return BindingBuilder.bind(delayQueue()).to(delayExchange()).with("delay_key").noargs();
    }
}

五、配置RabbitListener

package com.base.system.listener;

import com.base.common.core.domain.entity.SysUser;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Slf4j
@Component
public class UserRabbitListener {

    @RabbitListener(queues = "delay_queue")
    public void consumeMessage(SysUser user) {
        log.info("收到消息：" + user.getUserName());
    }
}

六、发送消息

    private final RabbitTemplate rabbitTemplate;

    @GetMapping("createMessageTest")
    public String createMessageTest(@RequestParam Integer time) {

        SysUser sysUser = userService.selectUserById(1L);

        this.rabbitTemplate.convertAndSend(
                "delay_exchange",
                "delay_key",
                sysUser,
                message -> {
                    message.getMessageProperties().setDelay(time);
                    return message;
                }
        );
        return "创建消息成功";
    }