SpringBoot整合RabbitMQ-整合演示

本系列是学习SpringBoot整合RabbitMQ的练手，包含服务安装，RabbitMQ整合SpringBoot2.x，消息可靠性投递实现等三篇博客。

　　学习路径：https://www.imooc.com/learn/1042 RabbitMQ消息中间件极速入门与实战

　　项目源码：https://github.com/ZbLeaning/Boot-RabbitMQ

---

整合实际上主要两步：

　　1、引入相关依赖

　　2、对application.yml进行配置

注意：后续需要使用数据库，因此需要安装mysql。https://blog.csdn.net/qq_37719778/article/details/81298292  mysql安装教程

Spring.RabbitMQ配置的含义可参考：https://blog.csdn.net/en_joker/article/details/80103519

数据库建表语句：

DROP TABLE IF EXISTS `broker_message_log`;
CREATE TABLE `broker_message_log` (
  `message_id` varchar(255) NOT NULL COMMENT '消息唯一ID',
  `message` varchar(4000) NOT NULL COMMENT '消息内容',
  `try_count` int(4) DEFAULT '0' COMMENT '重试次数',
  `status` varchar(10) DEFAULT '' COMMENT '消息投递状态 0投递中，1投递成功，2投递失败',
  `next_retry` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP COMMENT '下一次重试时间',
  `create_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP,
  `update_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`message_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
-- ----------------------------
-- Table structure for t_order
-- ----------------------------
DROP TABLE IF EXISTS `t_order`;
CREATE TABLE `t_order` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `message_id` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2018091102 DEFAULT CHARSET=utf8;

完成前期准备后开始进行整合。

---

 Producer：服务端

　　1、新建一个SpringBoot项目，项目结构如下

　　2、添加Pom.xml文件依赖

 <!--rabbitmq依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.29</version>
        </dependency>
        <dependency>
            <groupId>com.github.miemiedev</groupId>
            <artifactId>mybatis-paginator</artifactId>
            <version>1.2.17</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--工具类依赖包-->
        <dependency>
            <groupId>org.apache-commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.49</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

　　3、配置application.yml文件

spring:
    rabbitmq:
        addresses: 134.175.33.221:5672
        username: guest
        password: guest
        virtual-host: /
        ##开启Publisher Confirm机制
        publisher-confirms: true
        ##开启Publisher Return机制
        publisher-returns: true
        template:
            mandatory: true
    datasource:
        url: jdbc:mysql://localhost:3306/rabbitmq?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
        username: root
        password: binzhang
        driverClassName: com.mysql.jdbc.Driver
        type: com.alibaba.druid.pool.DruidDataSource
server:
    port: 8001
    servlet:
        context-path: /
mybatis:
    mapper-locations: classpath:mapping/*.xml
    logging:
        level:
            tk:
                mybatis: trace

　　4、编写消息发送类，直接使用SpringBoot配置的RabbitTemplate模板

import com.imooc.mq.entity.Order;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
/**
 * @Title: OrderSender
 * @Description: 订单发送
 * @date 2019/1/2210:20
 */
@Component
public class OrderSender {
    //使用rabbitmq模板
    @Autowired
    private RabbitTemplate rabbitTemplate;
　　　//发送消息
    public void sendOrder(Order order) throws Exception{
　　　　　
        CorrelationData correlationData = new CorrelationData();
        correlationData.setId(order.getMessageId());
 
        rabbitTemplate.convertAndSend("order-exchange",//exchange
                "order.abcd",//routingKey
                order,//消息体内容
                correlationData); //消息唯一id
    }
}

　　5、通过控制面板手动建立交换机exchange、消息队列queue

　　6、点击进入创建好的order-exchange，设置绑定路由键

　　7、写测试demo，运行消息发现，看控制台是否收到消息

@RunWith(SpringRunner.class)
@SpringBootTest
public class MqApplicationTests {
    @Autowired
    private OrderSender orderSender;
 
    @Test
    public void contextLoads() {
        Order order = new Order();
        order.setId("aaa");
        order.setName("测试消息a");
        order.setMessageId(System.currentTimeMillis() + "$" + UUID.randomUUID().toString());
        try {
            orderSender.sendOrder(order);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
}

　　接收消息成功：

　　

　　注意：启动时如果报异常

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

　　则需要配置

@MapperScan("com.imooc.mq.mapper") @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) 

---

 Consumer：消费端 

　　1、项目结构

　　2、配置Pom.xml文件，引入依赖，可直接复制服务端pom.xml注入的依赖

　　3、配置Application.xml文件

## springboot整合rabbitmq的基本配置
spring:
  rabbitmq:
    addresses: 134.175.33.221:5672
    username: guest
    password: guest
    ##连接到RabbitMQ的虚拟主机
    virtual-host: /
    ## 消费端配置
    listener:
      simple:
        ##消费者的最小数量
        concurrency: 5
        ## manual:手动 ack（确认）
        acknowledge-mode: manual
        ##消费者的最大数量
        max-concurrency: 10
        ##在单个请求中处理的消息个数，应该大于等于事务数量
        prefetch: 1
  datasource:
    url: jdbc:mysql://localhost:3306/rabbitmq?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
    username: root
    password: binzhang
    driverClassName: com.mysql.jdbc.Driver
server:
  port: 8002
  servlet:
    context-path: /

　　4、需要将服务端的Order类也复制到消费端

　　5、编写消息接收类

import com.imooc.mq.entity.Order;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Headers;
import org.springframework.messaging.handler.annotation.Payload;
import org.springframework.stereotype.Component;
 
import java.util.Map;
 
/**
 * @Title: OrderReceiver
 * @Description: 消费
 * @date 2019/1/2211:03
 */
@Component
public class OrderReceiver {
    /**
     * @RabbitListener 消息监听，可配置交换机、队列、路由key
     * 该注解会创建队列和交互机 并建立绑定关系
     * @RabbitHandler 标识此方法如果有消息过来，消费者要调用这个方法
     * @Payload 消息体
     * @Headers 消息头
     * @param order
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "order-queue",declare = "true"),
            exchange = @Exchange(name = "order-exchange",declare = "true",type = "topic"),
            key = "order.abcd"
    ))
    @RabbitHandler
    public void onOrderMessage(@Payload Order order, @Headers Map<String,Object> headers,
                               Channel channel) throws Exception{
        //消费者操作
        System.out.println("------收到消息，开始消费------");
        System.out.println("订单ID："+order.getId());
 
        Long deliveryTag = (Long)headers.get(AmqpHeaders.DELIVERY_TAG);
        //现在是手动确认消息 ACK
        channel.basicAck(deliveryTag,false);
    }
}

　　6、运行成功后

　

基本的服务和消费端整合及演示demo已完成，一般开发过程中我们大都采用手动确认消息机制，如果注释掉该行则会出现消息被消费但是一直处于未被确认的状态。当重启服务端再次发现消息时，消息也会被消费。