消息队列实现分布式事务

 业务流转图：

搭建环境：activemq + springboot + mybatis + mysql

1、下载activemq配置activemq配置信息(conf/activemq.xml):

2、建表td_order_event，分别在每个服务对应的每个库创建一张临时流转表记录，这边演示创建两边一模一样的表)；

CREATE TABLE `td_order_event` (
  `id` tinyint(10) NOT NULL,
  `order_type` tinyint(10) DEFAULT NULL COMMENT '订单类型(0: 创建，1, 已下单，2，已支付  )',
  `process` varchar(255) DEFAULT NULL,
  `content` varchar(500) DEFAULT NULL,
  `create_time` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
  `update_time` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP COMMENT '订单中间事件表',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

---

3、分别准备两个服务 、搭建环境导入相关依赖;

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.projectlombok
            lombok
            1.18.12
            provided
        
        
            com.alibaba
            fastjson
            1.2.28
        
        
            mysql
            mysql-connector-java
            5.1.6
        
        
            com.alibaba
            druid
            1.1.22
        
        
            com.alibaba
            druid-spring-boot-starter
            1.1.22
        

        
            org.springframework.boot
            spring-boot-starter-activemq
        
        
            org.apache.activemq
            activemq-pool
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            2.0.0
        

        
            org.springframework.boot
            spring-boot-starter-tomcat
            provided
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
            
                
                    org.junit.vintage
                    junit-vintage-engine
                
            
        
    

4、配置生产端链接信息application.yml， 及代码编写；

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.jms.Queue;


@Configuration
public class ActiveConfig {

    @Value("${spring.activemq.broker-url}")
    private String brokerUrl;

    @Bean
    public Queue queue() {
        return new ActiveMQQueue("ActiveMQQueue");
    }

    @Bean
    public ActiveMQConnectionFactory connectionFactory() {
        return new ActiveMQConnectionFactory(brokerUrl);
    }
}

@SpringBootApplication
@MapperScan(value = "com.xxx.serviceorder.dao")
@EnableJms
@EnableScheduling
public class ServiceOrderApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceOrderApplication.class, args);
    }

}

4.2 编写sql语句， 分别一个查询语句，更新数据；

 4.3 编写定时任务，监听数据；

import com.alibaba.fastjson.JSONObject;
import com.xckk.serviceorder.dao.TdOrderEventDao;
import com.xckk.serviceorder.entity.TdOrderEvent;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import javax.jms.Queue;
import java.util.Date;
import java.util.List;

@Component
public class Produce {
    @Autowired
    private TdOrderEventDao tdOrderEventDao;

    @Autowired
    private Queue queue;
    @Autowired
    private JmsMessagingTemplate jmsMessagingTemplate;


    @Scheduled(cron = "0/5 * * * * ?")
    @Transactional(rollbackFor = Exception.class)
    public void task() {
        System.out.println(new Date() +"【开始执行】");

        // 查询新建的中间表
        List tdOrderEvents = tdOrderEventDao.selectOrderEventByType("0");

        for (TdOrderEvent tdOrderEvent : tdOrderEvents) {
            tdOrderEventDao.updateOrderEventById(tdOrderEvent.getId());

            System.out.println(tdOrderEvent.getId() + "数据修改成功");
            //
            jmsMessagingTemplate.convertAndSend(queue, JSONObject.toJSONString(tdOrderEvent));
        }

    }
}

5、编写消费端代码；

 sql语句，利用主键id，确保消息重复；

 5.1 配置mqbean信息

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.RedeliveryPolicy;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.config.DefaultJmsListenerContainerFactory;
import org.springframework.jms.config.JmsListenerContainerFactory;

@Configuration
public class ActiveConfig {

    @Value("${spring.activemq.broker-url}")
    private String brokerUrl;

    @Value("${spring.activemq.user}")
    private String userName;

    @Value("${spring.activemq.password}")
    private String passWord;


    @Bean
    public ActiveMQConnectionFactory connectionFactory(RedeliveryPolicy redeliveryPolicy) {
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(userName, passWord, brokerUrl);
        connectionFactory.setRedeliveryPolicy(redeliveryPolicy);
        return connectionFactory;
    }

    /**
     * 重发配置
     * @return
     */
    @Bean
    public RedeliveryPolicy redeliveryPolicy() {
        RedeliveryPolicy policy = new RedeliveryPolicy();
        return policy;
    }

    @Bean
    public JmsListenerContainerFactory jmsListenerContainerFactory(ActiveMQConnectionFactory activeMQConnectionFactory) {
        DefaultJmsListenerContainerFactory containerFactory = new DefaultJmsListenerContainerFactory();
        containerFactory.setConnectionFactory(activeMQConnectionFactory);
        // 1: 自动确认 2：客户端手动确认 3：自动批量确认 4：事务提交并确认
        containerFactory.setSessionAcknowledgeMode(2);
        return containerFactory;
    }


}

业务处理 ：处理失败测重试六次，六次都失败则加入死信队列处理；

import com.alibaba.fastjson.JSONObject;
import com.xckk.servicepay.dao.TdOrderEventDao;
import com.xckk.servicepay.entity.TdOrderEvent;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;

import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;

@Component
public class ConsumerQueue {

    @Autowired
    private TdOrderEventDao tdOrderEventDao;

    @JmsListener(destination = "ActiveMQQueue", containerFactory = "jmsListenerContainerFactory")
    public void receive(TextMessage textMessage, Session session) throws JMSException {
        System.out.println(" 消费的消息："+textMessage.getText());
        try {
            String text = textMessage.getText();
            TdOrderEvent tdOrderEvent = JSONObject.toJavaObject(JSONObject.parseObject(text), TdOrderEvent.class);
            tdOrderEventDao.insert(tdOrderEvent);

            textMessage.acknowledge();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("ActiveMQQueue>>> 异常！！！！");
            session.recover();
        }
    }
    /**
     * 死信队列
     *
     * @param text
     */
    @JmsListener(destination = "DLQ.ActiveMQQueue")
    public void receive(String text) {
        System.out.println("处理失败的数据！！！" + text);
    }
}

验证：

1、启动mq 

2、启动两端服务

3、插入一条测试数据

 

数据处理完毕；

4、测试异常信息（比如mq挂掉、消息重复等等）