RabbitMQ消息可靠性投递解决方案 - 基于SpringBoot实现

https://www.imooc.com/article/49814

参考地址：

https://www.imooc.com/t/2726237

谈到消息的可靠性投递，无法避免的，在实际的工作中会经常碰到，比如一些核心业务需要保障消息不丢失，接下来我们看一个可靠性投递的流程图，说明可靠性投递的概念：

• Step 1： 首先把消息信息(业务数据）存储到数据库中，紧接着，我们再把这个消息记录也存储到一张消息记录表里（或者另外一个同源数据库的消息记录表）

• Step 2：发送消息到MQ Broker节点（采用confirm方式发送，会有异步的返回结果）

• Step 3、4：生产者端接受MQ Broker节点返回的Confirm确认消息结果，然后进行更新消息记录表里的消息状态。比如默认Status = 0 当收到消息确认成功后，更新为1即可！

• Step 5：但是在消息确认这个过程中可能由于网络闪断、MQ Broker端异常等原因导致 回送消息失败或者异常。这个时候就需要发送方（生产者）对消息进行可靠性投递了，保障消息不丢失，100%的投递成功！（有一种极限情况是闪断，Broker返回的成功确认消息，但是生产端由于网络闪断没收到，这个时候重新投递可能会造成消息重复，需要消费端去做幂等处理）所以我们需要有一个定时任务，（比如每5分钟拉取一下处于中间状态的消息，当然这个消息可以设置一个超时时间，比如超过1分钟 Status = 0 ，也就说明了1分钟这个时间窗口内，我们的消息没有被确认，那么会被定时任务拉取出来）

• Step 6：接下来我们把中间状态的消息进行重新投递 retry send，继续发送消息到MQ ，当然也可能有多种原因导致发送失败

• Step 7：我们可以采用设置最大努力尝试次数，比如投递了3次，还是失败，那么我们可以将最终状态设置为Status = 2 ，最后 交由人工解决处理此类问题（或者把消息转储到失败表中）。

接下来，我们使用SpringBoot2.x 实现这一可靠性投递策略：

废话不多说，直接上代码：

• 数据库库表结构：订单表和消息记录表

-- 表 order 订单结构
CREATE TABLE IF NOT EXISTS `t_order` (
  `id` varchar(128) NOT NULL, -- 订单ID
  `name` varchar(128), -- 订单名称 其他业务熟悉忽略
  `message_id` varchar(128) NOT NULL, -- 消息唯一ID
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- 表 broker_message_log 消息记录结构
CREATE TABLE IF NOT EXISTS `broker_message_log` (
  `message_id` varchar(128) NOT NULL, -- 消息唯一ID
  `message` varchar(4000) DEFAULT NULL, -- 消息内容
  `try_count` int(4) DEFAULT '0', -- 重试次数
  `status` varchar(10) DEFAULT '', -- 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',  -- 下一次重试时间 或 超时时间
  `create_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', -- 创建时间
  `update_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', -- 更新时间
  PRIMARY KEY (`message_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

• 整合SpringBoot 实现生产端代码如下：pom.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.bfxy</groupId>
    <artifactId>rabbitmq-springboot-producer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>rabbitmq-springboot-producer</name>
    <description>rabbitmq-springboot-producer</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <!-- 添加JDBC jar -->
        <dependency>
          <groupId>org.mybatis.spring.boot</groupId>
          <artifactId>mybatis-spring-boot-starter</artifactId>
          <version>1.1.1</version>
        </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>1.0.24</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- mybatis分页插件 -->
        <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>
        <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>1.1.26</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>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

• application.properties配置：

• spring.rabbitmq.addresses=192.168.11.76:5672
  spring.rabbitmq.username=guest
  spring.rabbitmq.password=guest
  spring.rabbitmq.virtual-host=/
  spring.rabbitmq.connection-timeout=15000
  spring.rabbitmq.publisher-confirms=true
  spring.rabbitmq.publisher-returns=true
  spring.rabbitmq.template.mandatory=true
  server.servlet.context-path=/
  server.port=8001
  spring.http.encoding.charset=UTF-8
  spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
  spring.jackson.time-zone=GMT+8
  spring.jackson.default-property-inclusion=NON_NULL
  spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
  spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&useUnicode=true
  spring.datasource.driver-class-name=com.mysql.jdbc.Driver
  spring.datasource.username=root
  spring.datasource.password=root
  mybatis.type-aliases-package=com.bfxy.springboot
  mybatis.mapper-locations=classpath:com/bfxy/springboot/mapping/*.xml
  logging.level.tk.mybatis=TRACE

• 数据源druid.properties配置

##下面为连接池的补充设置，应用到上面所有数据源中
#初始化大小，最小，最大
druid.initialSize=5
druid.minIdle=10
druid.maxActive=300
#配置获取连接等待超时的时间
druid.maxWait=60000
#配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
druid.timeBetweenEvictionRunsMillis=60000
#配置一个连接在池中最小生存的时间，单位是毫秒
druid.minEvictableIdleTimeMillis=300000
druid.validationQuery=SELECT 1 FROM DUAL
druid.testWhileIdle=true
druid.testOnBorrow=false
druid.testOnReturn=false
#打开PSCache，并且指定每个连接上PSCache的大小
druid.poolPreparedStatements=true
druid.maxPoolPreparedStatementPerConnectionSize=20
#配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
druid.filters=stat,wall,log4j
#通过connectProperties属性来打开mergeSql功能；慢SQL记录
druid.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#合并多个DruidDataSource的监控数据
druid.useGlobalDataSourceStat=true

• 实体对象：

• package com.bfxy.springboot.entity;
  import java.io.Serializable;
  public class Order implements Serializable {
      private static final long serialVersionUID = 9111357402963030257L;
      private String id;
      private String name;
      private String messageId;
      public String getId() {
          return id;
      }
      public void setId(String id) {
          this.id = id == null ? null : id.trim();
      }
      public String getName() {
          return name;
      }
      public void setName(String name) {
          this.name = name == null ? null : name.trim();
      }
      public String getMessageId() {
          return messageId;
      }
      public void setMessageId(String messageId) {
          this.messageId = messageId == null ? null : messageId.trim();
      }
  }

• package com.bfxy.springboot.entity;
  import java.util.Date;
  public class BrokerMessageLog {
      private String messageId;
      private String message;
      private Integer tryCount;
      private String status;
      private Date nextRetry;
      private Date createTime;
      private Date updateTime;
      public String getMessageId() {
          return messageId;
      }
      public void setMessageId(String messageId) {
          this.messageId = messageId == null ? null : messageId.trim();
      }
      public String getMessage() {
          return message;
      }
      public void setMessage(String message) {
          this.message = message == null ? null : message.trim();
      }
      public Integer getTryCount() {
          return tryCount;
      }
      public void setTryCount(Integer tryCount) {
          this.tryCount = tryCount;
      }
      public String getStatus() {
          return status;
      }
      public void setStatus(String status) {
          this.status = status == null ? null : status.trim();
      }
      public Date getNextRetry() {
          return nextRetry;
      }
      public void setNextRetry(Date nextRetry) {
          this.nextRetry = nextRetry;
      }
      public Date getCreateTime() {
          return createTime;
      }
      public void setCreateTime(Date createTime) {
          this.createTime = createTime;
      }
      public Date getUpdateTime() {
          return updateTime;
      }
      public void setUpdateTime(Date updateTime) {
          this.updateTime = updateTime;
      }
  }

• 数据库连接池代码：

• package com.bfxy.springboot.config.database;
  import java.sql.SQLException;
  import javax.sql.DataSource;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
  import org.springframework.jdbc.datasource.DataSourceTransactionManager;
  import org.springframework.transaction.PlatformTransactionManager;
  import org.springframework.transaction.annotation.EnableTransactionManagement;
  import com.alibaba.druid.pool.DruidDataSource;
  @Configuration
  @EnableTransactionManagement
  public class DruidDataSourceConfig {
  
      private static Logger logger = LoggerFactory.getLogger(DruidDataSourceConfig.class);
  
      @Autowired
      private DruidDataSourceSettings druidSettings;
  
      public static String DRIVER_CLASSNAME ;
  
      @Bean
      public static PropertySourcesPlaceholderConfigurer propertyConfigure(){
          return new PropertySourcesPlaceholderConfigurer();
      }
  
      @Bean
      public DataSource dataSource() throws SQLException {
          DruidDataSource ds = new DruidDataSource();
          ds.setDriverClassName(druidSettings.getDriverClassName());
          DRIVER_CLASSNAME = druidSettings.getDriverClassName();
          ds.setUrl(druidSettings.getUrl());
          ds.setUsername(druidSettings.getUsername());
          ds.setPassword(druidSettings.getPassword());
          ds.setInitialSize(druidSettings.getInitialSize());
          ds.setMinIdle(druidSettings.getMinIdle());
          ds.setMaxActive(druidSettings.getMaxActive());
          ds.setTimeBetweenEvictionRunsMillis(druidSettings.getTimeBetweenEvictionRunsMillis());
          ds.setMinEvictableIdleTimeMillis(druidSettings.getMinEvictableIdleTimeMillis());
          ds.setValidationQuery(druidSettings.getValidationQuery());
          ds.setTestWhileIdle(druidSettings.isTestWhileIdle());
          ds.setTestOnBorrow(druidSettings.isTestOnBorrow());
          ds.setTestOnReturn(druidSettings.isTestOnReturn());
          ds.setPoolPreparedStatements(druidSettings.isPoolPreparedStatements());
          ds.setMaxPoolPreparedStatementPerConnectionSize(druidSettings.getMaxPoolPreparedStatementPerConnectionSize());
          ds.setFilters(druidSettings.getFilters());
          ds.setConnectionProperties(druidSettings.getConnectionProperties());
          logger.info(" druid datasource config : {} ", ds);
          return ds;
      }
      @Bean
      public PlatformTransactionManager transactionManager() throws Exception {
          DataSourceTransactionManager txManager = new DataSourceTransactionManager();
          txManager.setDataSource(dataSource());
          return txManager;
      }
  
  }

package com.bfxy.springboot.config.database;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix="spring.datasource")
@PropertySource("classpath:druid.properties")
public class DruidDataSourceSettings {
    private String driverClassName;
    private String url;
    private String username;
    private String password;

    @Value("${druid.initialSize}")
    private int initialSize;

    @Value("${druid.minIdle}")
    private int minIdle;

    @Value("${druid.maxActive}")
    private int maxActive;

    @Value("${druid.timeBetweenEvictionRunsMillis}")
    private long timeBetweenEvictionRunsMillis;

    @Value("${druid.minEvictableIdleTimeMillis}")
    private long minEvictableIdleTimeMillis;

    @Value("${druid.validationQuery}")
    private String validationQuery;

    @Value("${druid.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${druid.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${druid.testOnReturn}")
    private boolean testOnReturn;

    @Value("${druid.poolPreparedStatements}")
    private boolean poolPreparedStatements;

    @Value("${druid.maxPoolPreparedStatementPerConnectionSize}")
    private int maxPoolPreparedStatementPerConnectionSize;

    @Value("${druid.filters}")
    private String filters;

    @Value("${druid.connectionProperties}")
    private String connectionProperties;

    @Bean
    public static PropertySourcesPlaceholderConfigurer properdtyConfigure(){
        return new PropertySourcesPlaceholderConfigurer();
    }

    public String getDriverClassName() {
        return driverClassName;
    }
    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getInitialSize() {
        return initialSize;
    }
    public void setInitialSize(int initialSize) {
        this.initialSize = initialSize;
    }
    public int getMinIdle() {
        return minIdle;
    }
    public void setMinIdle(int minIdle) {
        this.minIdle = minIdle;
    }
    public int getMaxActive() {
        return maxActive;
    }
    public void setMaxActive(int maxActive) {
        this.maxActive = maxActive;
    }
    public long getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }
    public void setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }
    public long getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }
    public void setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }
    public String getValidationQuery() {
        return validationQuery;
    }
    public void setValidationQuery(String validationQuery) {
        this.validationQuery = validationQuery;
    }
    public boolean isTestWhileIdle() {
        return testWhileIdle;
    }
    public void setTestWhileIdle(boolean testWhileIdle) {
        this.testWhileIdle = testWhileIdle;
    }
    public boolean isTestOnBorrow() {
        return testOnBorrow;
    }
    public void setTestOnBorrow(boolean testOnBorrow) {
        this.testOnBorrow = testOnBorrow;
    }
    public boolean isTestOnReturn() {
        return testOnReturn;
    }
    public void setTestOnReturn(boolean testOnReturn) {
        this.testOnReturn = testOnReturn;
    }
    public boolean isPoolPreparedStatements() {
        return poolPreparedStatements;
    }
    public void setPoolPreparedStatements(boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }
    public int getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }
    public void setMaxPoolPreparedStatementPerConnectionSize(
            int maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }
    public String getFilters() {
        return filters;
    }
    public void setFilters(String filters) {
        this.filters = filters;
    }
    public String getConnectionProperties() {
        return connectionProperties;
    }
    public void setConnectionProperties(String connectionProperties) {
        this.connectionProperties = connectionProperties;
    }

}

package com.bfxy.springboot.config.database;
import javax.sql.DataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
@Configuration
public class MybatisDataSourceConfig {

    @Autowired
    private DataSource dataSource;

    @Bean(name="sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactoryBean() {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        // 添加XML目录
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        try {
            bean.setMapperLocations(resolver.getResources("classpath:com/bfxy/springboot/mapping/*.xml"));
            SqlSessionFactory sqlSessionFactory = bean.getObject();
            sqlSessionFactory.getConfiguration().setCacheEnabled(Boolean.TRUE);

            return sqlSessionFactory;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    @Bean
    public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

package com.bfxy.springboot.config.database;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@AutoConfigureAfter(MybatisDataSourceConfig.class)
public class MybatisMapperScanerConfig {

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer() {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
        mapperScannerConfigurer.setBasePackage("com.bfxy.springboot.mapper");
        return mapperScannerConfigurer;
    }
}

• 定时任务配置代码：

• package com.bfxy.springboot.config.task;
  import java.util.concurrent.Executor;
  import java.util.concurrent.Executors;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.scheduling.annotation.EnableScheduling;
  import org.springframework.scheduling.annotation.SchedulingConfigurer;
  import org.springframework.scheduling.config.ScheduledTaskRegistrar;
  @Configuration
  @EnableScheduling
  public class TaskSchedulerConfig implements SchedulingConfigurer {
      @Override
      public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
          taskRegistrar.setScheduler(taskScheduler());
      }
  
      @Bean(destroyMethod="shutdown")
      public Executor taskScheduler(){
          return Executors.newScheduledThreadPool(100);
      }
  }

• 常量类：

package com.bfxy.springboot.constant;
public final class Constants {
    public static final String ORDER_SENDING = "0"; //发送中

    public static final String ORDER_SEND_SUCCESS = "1"; //成功

    public static final String ORDER_SEND_FAILURE = "2"; //失败

    public static final int ORDER_TIMEOUT = 1; /*分钟超时单位：min*/
}

• 消息记录表核心业务：

package com.bfxy.springboot.mapper;
import java.util.Date;
import org.apache.ibatis.annotations.Param;
import com.bfxy.springboot.entity.BrokerMessageLog;
import com.sun.tools.javac.util.List;
public interface BrokerMessageLogMapper {
    /**
     * 查询消息状态为0(发送中) 且已经超时的消息集合
     * @return
     */
    List<BrokerMessageLog> query4StatusAndTimeoutMessage();

    /**
     * 重新发送统计count发送次数 +1
     * @param messageId
     * @param updateTime
     */
    void update4ReSend(@Param("messageId")String messageId, @Param("updateTime")Date updateTime);
    /**
     * 更新最终消息发送结果 成功 or 失败
     * @param messageId
     * @param status
     * @param updateTime
     */
    void changeBrokerMessageLogStatus(@Param("messageId")String messageId, @Param("status")String status, @Param("updateTime")Date updateTime);

}

• 对应的SQL代码：

    <select id="query4StatusAndTimeoutMessage" resultMap="BaseResultMap">
          <![CDATA[
          select message_id, message, try_count, status, next_retry, create_time, update_time
              from broker_message_log bml
              where status = '0'
              and next_retry <= sysdate()
          ]]>
    </select>

  <update id="update4ReSend" >
    update broker_message_log bml
    set bml.try_count = bml.try_count + 1,
      bml.update_time = #{updateTime, jdbcType=TIMESTAMP}
    where bml.message_id = #{messageId,jdbcType=VARCHAR}
  </update>

  <update id="changeBrokerMessageLogStatus" >
    update broker_message_log bml
    set bml.status = #{status,jdbcType=VARCHAR},
          bml.update_time = #{updateTime, jdbcType=TIMESTAMP}
    where bml.message_id = #{messageId,jdbcType=VARCHAR}
  </update>

• 核心发送代码：orderService

• package com.bfxy.springboot.service;
  import java.util.Date;
  import org.apache.commons.lang3.time.DateUtils;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import com.bfxy.springboot.constant.Constants;
  import com.bfxy.springboot.entity.BrokerMessageLog;
  import com.bfxy.springboot.entity.Order;
  import com.bfxy.springboot.mapper.BrokerMessageLogMapper;
  import com.bfxy.springboot.mapper.OrderMapper;
  import com.bfxy.springboot.producer.RabbitOrderSender;
  import com.bfxy.springboot.utils.FastJsonConvertUtil;
  @Service
  public class OrderService {
      @Autowired
      private OrderMapper orderMapper;
  
      @Autowired
      private BrokerMessageLogMapper brokerMessageLogMapper;
  
      @Autowired
      private RabbitOrderSender rabbitOrderSender;
  
      public void createOrder(Order order) throws Exception {
          // 使用当前时间当做订单创建时间（为了模拟一下简化）
          Date orderTime = new Date();
          // 插入业务数据
          orderMapper.insert(order);
          // 插入消息记录表数据
          BrokerMessageLog brokerMessageLog = new BrokerMessageLog();
          // 消息唯一ID
          brokerMessageLog.setMessageId(order.getMessageId());
          // 保存消息整体 转为JSON 格式存储入库
          brokerMessageLog.setMessage(FastJsonConvertUtil.convertObjectToJSON(order));
           // 设置消息状态为0 表示发送中
          brokerMessageLog.setStatus("0");
           // 设置消息未确认超时时间窗口为 一分钟
          brokerMessageLog.setNextRetry(DateUtils.addMinutes(orderTime, Constants.ORDER_TIMEOUT));
          brokerMessageLog.setCreateTime(new Date());
          brokerMessageLog.setUpdateTime(new Date());
          brokerMessageLogMapper.insert(brokerMessageLog);
          // 发送消息
          rabbitOrderSender.sendOrder(order);
      }
  
  }

• MQ消息发送核心代码：

package com.bfxy.springboot.producer;
import java.util.Date;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.core.RabbitTemplate.ConfirmCallback;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.bfxy.springboot.constant.Constants;
import com.bfxy.springboot.entity.Order;
import com.bfxy.springboot.mapper.BrokerMessageLogMapper;
import com.bfxy.springboot.mapper.OrderMapper;
@Component
public class RabbitOrderSender {
    //自动注入RabbitTemplate模板类
    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private BrokerMessageLogMapper brokerMessageLogMapper;

    //回调函数: confirm确认
    final ConfirmCallback confirmCallback = new RabbitTemplate.ConfirmCallback() {
        @Override
        public void confirm(CorrelationData correlationData, boolean ack, String cause) {
            System.err.println("correlationData: " + correlationData);
            String messageId = correlationData.getId();
            if(ack){
                //如果confirm返回成功 则进行更新
                brokerMessageLogMapper.changeBrokerMessageLogStatus(messageId, Constants.ORDER_SEND_SUCCESS, new Date());
            } else {
                //失败则进行具体的后续操作:重试 或者补偿等手段
                System.err.println("异常处理...");
            }
        }
    };

    //发送消息方法调用: 构建自定义对象消息
    public void sendOrder(Order order) throws Exception {
        rabbitTemplate.setConfirmCallback(confirmCallback);
        //消息唯一ID
        CorrelationData correlationData = new CorrelationData(order.getMessage_id());
        rabbitTemplate.convertAndSend("order-exchange", "order.ABC", order, correlationData);
    }

}

• 消息重试、最大努力尝试策略（定时任务）：

• package com.bfxy.springboot.task;
  import java.util.Date;
  import java.util.List;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.scheduling.annotation.Scheduled;
  import org.springframework.stereotype.Component;
  import com.bfxy.springboot.constant.Constants;
  import com.bfxy.springboot.entity.BrokerMessageLog;
  import com.bfxy.springboot.entity.Order;
  import com.bfxy.springboot.mapper.BrokerMessageLogMapper;
  import com.bfxy.springboot.producer.RabbitOrderSender;
  import com.bfxy.springboot.utils.FastJsonConvertUtil;
  @Component
  public class RetryMessageTasker {
  
      @Autowired
      private RabbitOrderSender rabbitOrderSender;
  
      @Autowired
      private BrokerMessageLogMapper brokerMessageLogMapper;
  
      @Scheduled(initialDelay = 5000, fixedDelay = 10000)
      public void reSend(){
          //pull status = 0 and timeout message
          List<BrokerMessageLog> list = brokerMessageLogMapper.query4StatusAndTimeoutMessage();
          list.forEach(messageLog -> {
              if(messageLog.getTryCount() >= 3){
                  //update fail message
                  brokerMessageLogMapper.changeBrokerMessageLogStatus(messageLog.getMessageId(), Constants.ORDER_SEND_FAILURE, new Date());
              } else {
                  // resend
                  brokerMessageLogMapper.update4ReSend(messageLog.getMessageId(),  new Date());
                  Order reSendOrder = FastJsonConvertUtil.convertJSONToObject(messageLog.getMessage(), Order.class);
                  try {
                      rabbitOrderSender.sendOrder(reSendOrder);
                  } catch (Exception e) {
                      e.printStackTrace();
                      System.err.println("-----------异常处理-----------");
                  }
              }
          });
      }
  }

• 测试发送订单：

  

• 代码如下：

    @Autowired
    private RabbitOrderSender rabbitOrderSender;

    @Test
    public void testSender2() throws Exception {
         Order order = new Order();
         order.setId("2018080400000001");
         order.setName("测试订单");
         order.setMessage_id(System.currentTimeMillis() + "$" + UUID.randomUUID().toString());
         rabbitOrderSender.sendOrder(order);
    }

• 监控台查看消息：

• 发送成功！ 现在测试 发送订单并且入库（业务库和消息记录库）

    @Autowired
    private OrderService orderService;

    @Test
    public void testCreateOrder() throws Exception {
         Order order = new Order();
         order.setId("2018080400000002");
         order.setName("测试创建订单");
         order.setMessageId(System.currentTimeMillis() + "$" + UUID.randomUUID().toString());
        orderService.createOrder(order);
    }

• 发送成功 并且入库OK:业务表 和 消息记录表均有数据 且status状态=1 为成功！

• 业务表：

• 消息记录表：

• 测试失败情况：修改路由KEY为 无法路由即可！

• 这样消息就算失败的情况了。然后ACK的时候就会走异常处理，消息记录表如下：

  

• 最后我们测试重试策略：直接启动生产者应用，开启定时任务，重试几次后，库表信息变化如下:

  

• 最终重试3次 失败结果更新 status = 2

RabbitMQ消息中间件技术精讲：RabbitMQ是目前主流的消息中间件，非常适用于高并发环境。各大互联网公司都在使用的MQ技术，晋级技术骨干、团队核心的必备技术！

作者：阿神_
链接：https://www.imooc.com/article/49814
来源：慕课网
本文原创发布于慕课网 ，转载请注明出处，谢谢合作