SpringBoot 整合 RabbitMQ 实践

作者：Cott www.cnblogs.com/cott/p/12402423.html

前文总结了，本文基于这套框架，引入RabbitMQ消息队列。

1.在linux环境使用docker安装RabbitMQ

//拉取镜像
docker pull rabbitmq:management
//启动镜像
docker run -di --name myrabbit -e RABBITMQ_DEFAULT_USER=admin -e RABBITMQ_DEFAULT_PASS=admin -p 15672:15672 -p5672:5672 -p 25672:25672 -p 61613:61613 -p 1883:1883 rabbitmq:management

安装成功后登陆控制台

2.生产者

pom.xml中引入RabbitMQ依赖

!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-amqp --
dependency
   groupIdorg.springframework.boot/groupId
   artifactIdspring-boot-starter-amqp/artifactId
　　version1.3.5.RELEASE/version
/dependency

配置RabbitMQ服务端连接，和交换机名称

application.yml

spring:
  rabbitmq:
    port: 5672
    username: admin
    password: admin
    host: 192.168.200.128
    virtual-host: /

order:
  fanout:
    exchange: order.fanout.exchange

生产者向MQ发送消息

Producer.java

package com.cott.gmail.bootuserserviceprovider.mq;

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

import java.util.Date;
import java.util.UUID;

@Component
public class Producer {
    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Value("${order.fanout.exchange}")
    private String exchangeName;

    public void sendMsg() {
        String orderId = UUID.randomUUID().toString();
        String message = "你的订单信息是：" + orderId + ",日期是：" + new Date();
        rabbitTemplate.convertAndSend(exchangeName, message);
    }
}

在用户接口的实现类中，调用生产者的方法

UserServiceImpl.java

package com.cott.gmail.bootuserserviceprovider.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.cott.gmail.bean.UserAddress;
import com.cott.gmail.bootuserserviceprovider.mq.Producer;
import com.cott.gmail.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;

@Service
@Component
public class UserServiceImpl implements UserService {

    @Autowired
    Producer producer;

    @Override
    public ListUserAddress getAddress(String uesrId) {
        producer.sendMsg();
        UserAddress userAddress1 = new UserAddress();
        userAddress1.setId(1);
        userAddress1.setUserAddress("1");
        userAddress1.setUserId("1");
        UserAddress userAddress2 = new UserAddress();
        userAddress2.setId(2);
        userAddress2.setUserAddress("2");
        userAddress2.setUserId("2");

        return Arrays.asList(userAddress1, userAddress2);
    }
}

3.消费者

pom.xml中引入RabbitMQ依赖

!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-amqp --
dependency
   groupIdorg.springframework.boot/groupId
   artifactIdspring-boot-starter-amqp/artifactId
　　version1.3.5.RELEASE/version
/dependency

配置RabbitMQ服务端信息，和交换机以及队列名称

application.yml

spring:
  rabbitmq:
    port: 5672
    username: admin
    password: admin
    host: 192.168.200.128
    virtual-host: /

order:
  fanout:
    exchange: order.fanout.exchange
    queue: order.fanout.queue

@RabbitListener注解，绑定队列，交换机，以及选择交换模式FANOUT

@RabbitListener 可以标注在类上面，需配合 @RabbitHandler 注解一起使用

@RabbitListener 标注在类上面表示当有收到消息的时候，就交给 @RabbitHandler 的方法处理，具体使用哪个方法处理，根据 MessageConverter 转换后的参数类型

@RabbitListener 标注在类上面表示当有收到消息的时候，就交给 @RabbitHandler 的方法处理，具体使用哪个方法处理，根据 MessageConverter 转换后的参数类型

Consumer.java（消费者）

package com.cott.gmail.bootorderserviceconsumer.service.impl;

import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.stereotype.Component;

@Component
@RabbitListener(bindings = @QueueBinding(value = @Queue(value = "${order.fanout.queue}", autoDelete = "true"), exchange =
@Exchange(value = "${order.fanout.exchange}", type = ExchangeTypes.FANOUT)))
public class Consumer {

    @RabbitHandler
    public void processMessage(String msg) {
        System.out.format("Receiving Message: -----[%s]----- n.", msg);
    }
}

消费者中有调用生产者getAddress()的方法，生产者向MQ中发送一条消息，同时消费者监听MQ，消费消息。

OrderServiceImpl.java

package com.cott.gmail.bootorderserviceconsumer.service.impl;

import com.alibaba.dubbo.config.annotation.Reference;
import com.cott.gmail.bean.UserAddress;
import com.cott.gmail.service.OrderService;
import com.cott.gmail.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class OrderServiceImpl implements OrderService {

    @Reference
    UserService userService;

    @Override
    public ListUserAddress initOrder(String id) {
        System.out.println("id= " + id);
        ListUserAddress list = userService.getAddress("1");
        for (UserAddress user : list
        ) {
            System.out.println(user.getUserAddress());
        }
        return list;
    }
}

4.验证

先后启动生产者和消费者，在浏览器发起请求

消费者控制台输出

同时在RabbitMQ控制台查看监控日志

END

Java面试题专栏

我知道你 “在看”

原文始发于微信公众号（Java知音）：