SpringBoot(5) ------>整合RabbitMQ

RabbitMQ安装

1、拉取镜像

docker pull rabbitmq:3.7.7-management

选择带有“mangement”的版本（包含web管理页面）；

2、启动

docker run -d --name rabbitmq3.7.7 -p 5672:5672 -p 15672:15672 -v `pwd`/data:/var/lib/rabbitmq --hostname myRabbit -e RABBITMQ_DEFAULT_VHOST=my_vhost  -e RABBITMQ_DEFAULT_USER=admin -e RABBITMQ_DEFAULT_PASS=admin df80af9ca0c9

• -d 后台运行容器；
• --name 指定容器名；
• -p 指定服务运行的端口（5672：应用访问端口；15672：控制台Web端口号）；
• -v 映射目录或文件；
• --hostname 主机名（RabbitMQ的一个重要注意事项是它根据所谓的 “节点名称” 存储数据，默认为主机名）；
• -e 指定环境变量；（RABBITMQ_DEFAULT_VHOST：默认虚拟机名；RABBITMQ_DEFAULT_USER：默认的用户名；RABBITMQ_DEFAULT_PASS：默认用户名的密码）
• df80af9ca0c9  容器id

3、浏览器访问

 http://Server-IP:15672

整合SpringBoot

1、向pom文件添加依赖

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

2、application.yml配置

#rabbitmq配置
spring:
  rabbitmq:
    host: 192.168.0.18
    username: guest
    password: guest   #默认guest
    virtual-host: /   #默认/ 可以不写

3、rabbit配置类

　1）启动时创建交换机、消息队列与绑定规则配置

@Configuration
public class RabbitConfig {

    @Bean
    public Queue empQueue() {
        return new Queue("EmpQueue",true);
    }
    @Bean
    public Queue leaderQueue() {
        return new Queue("LeaderQueue",true);
    }

    @Bean
    DirectExchange userDirectExchange() {
        return new DirectExchange("userDirectExchange",true,false);
    }

    @Bean
    FanoutExchange userFanoutExchange() {
        return new FanoutExchange("userFanoutExchange",true,false);
    }

    @Bean
    TopicExchange userTopicExchange() {
        return new TopicExchange("userTopicExchange",true,false);
    }

    @Bean
    Binding empQueueToUserDirect() {
        return BindingBuilder.bind(empQueue()).to(userDirectExchange()).with("emp.queue");
    }
    @Bean
    Binding leaderQueueToUserDirect() {
        return BindingBuilder.bind(empQueue()).to(userDirectExchange()).with("leader.queue");
    }

    @Bean
    Binding empQueueToUserFanout() {
        return BindingBuilder.bind(empQueue()).to(userFanoutExchange());
    }
    @Bean
    Binding leaderQueueToUserFanout() {
        return BindingBuilder.bind(leaderQueue()).to(userFanoutExchange());
    }

    @Bean
    Binding empQueueToUserTopic() {
        return BindingBuilder.bind(empQueue()).to(userTopicExchange()).with("emp.#");
    }

    @Bean
    Binding leaderQueueToUserTopic() {
        return BindingBuilder.bind(leaderQueue()).to(userTopicExchange()).with("leader.#");
    }

}

　2）发送对象序列化配置

　在配置类中添加序列化机制

    /**
     * 将消息体转换为json
     * @return Jackson2JsonMessageConverter
     */
    @Bean
    public MessageConverter messageConverter(){
        return new Jackson2JsonMessageConverter();
    }

4、接收消息

　　添加@RabbitListener接收队列消息

package com.donleo.amqp.service;

import com.donleo.amqp.model.Book;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;

/**
 * @author liangd
 * date 2020-12-12 11:19
 * code
 */
@Service
public class BookService {
    /**
     * 获取对象
     */
    @RabbitListener(queues = "donleo")
    public void testBook(Book book){
        System.out.println("接收消息"+book);
    }

    /**
     * 获取message消息
     */
    @RabbitListener(queues = "donleo.emps")
    public void testBoot01(Message message){
        byte[] body = message.getBody();
        MessageProperties properties = message.getMessageProperties();
        System.out.println(body);
        System.out.println(properties);
    }
}

5、测试

package com.donleo.amqp;

import com.donleo.amqp.model.Book;
import org.junit.jupiter.api.Test;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.HashMap;

@SpringBootTest
class AmqpApplicationTests {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private AmqpAdmin amqpAdmin;

    /**
     * 通过AmqpAdmin创建交换机等
     */
    @Test
    void amqpAdmin(){
        //FanoutExchange  TopicExchange
//        amqpAdmin.declareExchange(new DirectExchange("amqpadmin.direct"));
//        amqpAdmin.declareQueue(new Queue("amqpadmin.product"));
        //绑定规则
        amqpAdmin.declareBinding(new Binding(
                "amqpadmin.product",
                Binding.DestinationType.QUEUE,"amqpadmin.direct",
                "amqpadmin.product",null));
    }

    /**
     * 单播（点对点）
     */
    @Test
    void sendDirect() {
        //需要自定义消息体和消息内容
//        rabbitTemplate.send(exchange,routngKey,message);
        //一般使用这个，只需传入要发送的对象，自动序列化
        rabbitTemplate.convertAndSend("exchange.direct","donleo","点对点式");
    }

    /**
     * 接收消息
     */
    @Test
    void receiveDirect(){
        //receiveAndConvert 自动转换，receive接收有消息头等其它数据
        Object object = rabbitTemplate.receiveAndConvert("donleo");
        System.out.println(object);
    }

    /**
     * 广播
     */
    @Test
    void sendFanout(){
//        HashMap<String, Object> map = new HashMap<>();
//        map.put("username","zhangs");
//        map.put("nickname","张三");
//        rabbitTemplate.convertAndSend("exchange.fanout","",map);
        rabbitTemplate.convertAndSend("exchange.fanout","",new Book(1,"三国演义","罗贯中"));
    }

    /**
     * 接收消息
     */
    @Test
    void receiveFanout(){
        Object o = rabbitTemplate.receiveAndConvert("donleo.news");
        System.out.println(o);
    }
}