SpringBoot+RabbitMQ实现消息订阅发送

RabbitMQ 安装 （docker）

1. 拉取rabbitmq镜像文件

  # 未指定版本，拉取最新版本
  root# docker pull rabbitmq

2. 启动镜像

  root# docker run -d --hostname my-rabbit --name rabbit -p 15672:15672 -p 5672:5672 rabbitmq

3. 配置rabbitmq插件

  # 配置rabbitmq web管理页面
  root# docker exec -it 容器id rabbitmq-plugins enable rabbitmq_management
  
  # 配置rabbitmq mqtt协议
  root# docker exec -it 容器id rabbitmq-plugins enable rabbitmq_mqtt

  # 如果我们需要浏览器通过websocket连接到rabbitmq，我们还需要启动rabbitmq_web_mqtt插件
  root# docker exec 容器id rabbitmq-plugins enable rabbitmq_web_mqtt

  # docker 查看已安装插件
  root# docker exec rabbitmq rabbitmq-plugins list

4. 访问web管理页面
   浏览器输入：ip+15672

5. 可能出现问题
   5.1 Stats in management UI are disabled on this node。

   • docker exec -it 容器id /bin/bash
   • cat /etc/rabbitmq/conf.d/management_agent.disable_metrics_collector.conf （true）
   • cd /etc/rabbitmq/conf.d/
   • echo management_agent.disable_metrics_collector = false > management_agent.disable_metrics_collector.conf （将true修改为false）
   • docker restart 容器id

SpringBoot 配置

1. 添加pom依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.3.12.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <version>2.3.12.RELEASE</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
            <version>2.3.12.RELEASE</version>
        </dependency>

2. 添加yml配置

server:
  port: 32372
spring:
  application:
    name: spring-rabbitmq
  # rabbitmq 配置信息
  rabbitmq:
    host: 192.168.48.132
    port: 5672
    username: guest
    password: guest

3. 生产者

package com.ao.springrabbitmq.service.producer;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class Producer {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    public void produce() {
        String message = "晚上加班";
        System.out.println("老板说：" + message);
        rabbitTemplate.convertAndSend("notice_queue", message);
    }
}

4. 消费者

package com.ao.springrabbitmq.service.consumer;

import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class Consumer {

    @RabbitHandler
    @RabbitListener(queuesToDeclare = @Queue("notice_queue"))
    public void process(String message) {
        System.out.println("打工人收到通知：" + message);
    }
}

5. 测试类

package com.ao.springrabbitmq;

import com.ao.springrabbitmq.service.producer.Producer;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class RabbitMQTests {

    @Autowired
    Producer producer;

    @Test
    public void amqpTest() throws InterruptedException {
        // 生产者发送消息
        producer.produce();
        Thread.sleep(1000);
    }
}