一、前言

springboot整合多數(shù)據(jù)源解決分布式事務(wù)合武。
?????1.多數(shù)據(jù)源采用分包策略
?????2.全局分布式事務(wù)管理：jta-atomikos。
在此記錄下，分享給大家客给。

二袜漩、springboot整合多數(shù)據(jù)源解決分布式事務(wù)

1甜害、pom文件 依賴引入

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
        <relativePath />
    </parent>

    <dependencies>
        <!-- SpringBoot 測(cè)試 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- SpringBoot web組件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- mybatis 支持 SpringBoot -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>

        <!-- mysql 驅(qū)動(dòng) -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <!-- 全局事務(wù)集中管理 解決分布式事務(wù) -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jta-atomikos</artifactId>
        </dependency>

        <!-- SpringBoot 自動(dòng)配置 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- 注解式 插入/構(gòu)建/優(yōu)雅代碼 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.4</version>
        </dependency>
    </dependencies>

2通砍、 application.yml 新增配置

spring:
  datasource:
    ## 用戶數(shù)據(jù)庫(kù)
    user:
      url: jdbc:mysql://127.0.0.1:3306/yys_user
      username: root
      password: 123456
      borrowConnectionTimeout: 30
      loginTimeout: 30
      maintenanceInterval: 60
      maxIdleTime: 60
      maxLifetime: 20000
      maxPoolSize: 25
      minPoolSize: 3
      uniqueResourceName: userDataSource
      testQuery: select 1
    ## 訂單數(shù)據(jù)庫(kù)
    order:
      url: jdbc:mysql://127.0.0.1:3306/yys_order
      username: root
      password: 123456
      borrowConnectionTimeout: 30
      loginTimeout: 30
      maintenanceInterval: 60
      maxIdleTime: 60
      maxLifeTime: 20000
      maxPoolSize: 25
      minPoolSize: 3
      uniqueResourceName: orderDataSource
      testQuery: select 1

3、userConfig.java

@ConfigurationProperties(prefix = "spring.datasource.user")
@Data
public class UserConfig {

    private String url;

    private String userName;

    private String password;

    private int minPoolSize;

    private int maxPoolSize;

    private int maxLifeTime;

    private int maxIdleTime;

    private int loginTimeout;

    private int maintenanceInterval;

    private int borrowConnectionTimeout;

    private String testQuery;

    private String uniqueResourceName;

}

4前域、userDataSourceConfig.java

/**
 * 用戶數(shù)據(jù)源
 *      Config
 * @author yys
 */
@Configuration
@MapperScan(basePackages = "com.yys.user.mapper", sqlSessionTemplateRef = "userSqlSessionTemplate")
public class UserDataSourceConfig {

    /**
     * 創(chuàng)建 XADataSource
     * @return
     */
    @Bean("userDataSource")
    public DataSource userDataSource(UserConfig userConfig) throws SQLException {
        // 1辕近、創(chuàng)建Mysql XADataSource
        MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
        mysqlXaDataSource.setUrl(userConfig.getUrl());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
        mysqlXaDataSource.setPassword(userConfig.getPassword());
        mysqlXaDataSource.setUser(userConfig.getUserName());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

        // 2、將本地事務(wù)注冊(cè)到 Atomikos 全局事務(wù)
        AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
        xaDataSource.setXaDataSource(mysqlXaDataSource);
        xaDataSource.setUniqueResourceName(userConfig.getUniqueResourceName());
        xaDataSource.setMinPoolSize(userConfig.getMinPoolSize());
        xaDataSource.setMaxPoolSize(userConfig.getMaxPoolSize());
        xaDataSource.setMaxLifetime(userConfig.getMaxLifeTime());
        xaDataSource.setBorrowConnectionTimeout(userConfig.getBorrowConnectionTimeout());
        xaDataSource.setLoginTimeout(userConfig.getLoginTimeout());
        xaDataSource.setMaintenanceInterval(userConfig.getMaintenanceInterval());
        xaDataSource.setMaxIdleTime(userConfig.getMaxIdleTime());
        xaDataSource.setTestQuery(userConfig.getTestQuery());

        return xaDataSource;
    }

    /**
     * 創(chuàng)建 SQL會(huì)話工廠
     * @param dataSource
     * @return
     * @throws Exception
     */
    @Bean("userSqlSessionFactory")
    public SqlSessionFactory userSqlSessionFactory(@Qualifier("userDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        return sqlSessionFactoryBean.getObject();
    }

    /**
     * 創(chuàng)建用戶 SqlSession模板
     * @param sqlSessionFactory
     * @return
     */
    @Bean("userSqlSessionTemplate")
    public SqlSessionTemplate userSqlSessionTemplate(@Qualifier("userSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

5匿垄、orderConfig.java

@ConfigurationProperties(prefix = "spring.datasource.order")
@Data
public class OrderConfig {

    private String url;

    private String userName;

    private String password;

    private int minPoolSize;

    private int maxPoolSize;

    private int maxLifeTime;

    private int maxIdleTime;

    private int loginTimeout;

    private int maintenanceInterval;

    private int borrowConnectionTimeout;

    private String testQuery;

    private String uniqueResourceName;

}

6移宅、orderDataSourceConfig.java

/**
 * 訂單數(shù)據(jù)源
 *      Config
 * @author yys
 */
@Configuration
@MapperScan(basePackages = "com.yys.order.mapper", sqlSessionTemplateRef = "orderSqlSessionTemplate")
public class OrderDataSourceConfig {

    /**
     * 創(chuàng)建 XADataSource
     * @return
     */
    @Bean("orderDataSource")
    public DataSource orderDataSource(OrderConfig orderConfig) throws SQLException {

        // 1、創(chuàng)建Mysql XADataSource
        MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
        mysqlXaDataSource.setUrl(orderConfig.getUrl());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
        mysqlXaDataSource.setPassword(orderConfig.getPassword());
        mysqlXaDataSource.setUser(orderConfig.getUserName());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

        // 2椿疗、將本地事務(wù)注冊(cè)到 Atomikos 全局事務(wù)
        AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
        xaDataSource.setXaDataSource(mysqlXaDataSource);
        xaDataSource.setUniqueResourceName(orderConfig.getUniqueResourceName());
        xaDataSource.setMinPoolSize(orderConfig.getMinPoolSize());
        xaDataSource.setMaxPoolSize(orderConfig.getMaxPoolSize());
        xaDataSource.setMaxLifetime(orderConfig.getMaxLifeTime());
        xaDataSource.setBorrowConnectionTimeout(orderConfig.getBorrowConnectionTimeout());
        xaDataSource.setLoginTimeout(orderConfig.getLoginTimeout());
        xaDataSource.setMaintenanceInterval(orderConfig.getMaintenanceInterval());
        xaDataSource.setMaxIdleTime(orderConfig.getMaxIdleTime());
        xaDataSource.setTestQuery(orderConfig.getTestQuery());

        return xaDataSource;
    }

    /**
     * 創(chuàng)建 SQL會(huì)話工廠
     * @param dataSource
     * @return
     * @throws Exception
     */
    @Bean("orderSqlSessionFactory")
    public SqlSessionFactory orderSqlSessionFactory(@Qualifier("orderDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        return sqlSessionFactoryBean.getObject();
    }

    /**
     * 創(chuàng)建訂單 SqlSession模板
     * @param sqlSessionFactory
     * @return
     */
    @Bean("orderSqlSessionTemplate")
    public SqlSessionTemplate orderSqlSessionTemplate(@Qualifier("orderSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

7漏峰、MybatisController.java

/**
 * 多數(shù)據(jù)源解決分布式事務(wù)測(cè)試
 *      Controller
 * @author yys
 */
@RestController
@RequestMapping("/add")
public class MybatisController {

    @Autowired
    private UserService userService;

    @Autowired
    private OrderService orderService;

    /**
     * 新增用戶并生成訂單(解決分布式事務(wù)問(wèn)題)
     * @return
     */
    @RequestMapping("/user")
    public String addUser(String name, Integer age, Double amount, String address) {
        return userService.addUser(name, age, amount, address) ? "success" : "fail";
    }

}

8、UserService.java

/**
 * 用戶管理
 *      Service
 * @author yys
 */
@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private OrderMapper orderMapper;

    // 全局事務(wù)處理器
    // 事務(wù)底層原理采用aop技術(shù)做增強(qiáng)
    // 無(wú)需再指定某個(gè)事務(wù)管理器届榄，全交給 Atomikos 全局事務(wù)
    @Transactional
    public Boolean addUser(String name, Integer age, Double amount, String address) {

        // 操作用戶庫(kù)
        int i = userMapper.addUser(name, age);
        // 操作訂單庫(kù)
        int j = orderMapper.addOrder(amount, address);

        // 測(cè)試事務(wù)回滾(age = 0：回滾浅乔；age > 0：事務(wù)提交)
        int flag = 1 / age;

        return i > 0 && j > 0;
    }

}

9、UserMapper.java

/**
 * 用戶管理
 *      Mapper
 * @author yys
 */
public interface UserMapper {

    @Insert("INSERT INTO user VALUES (NULL, #{name}, #{age}, 1, NOW(), NOW())")
    int addUser(@Param("name") String name, @Param("age") Integer age);

}

10铝条、OrderMapper.java

/**
 * 訂單管理
 *      Mapper
 * @author yys
 */
public interface OrderMapper {

    // order為數(shù)據(jù)庫(kù)關(guān)鍵字靖苇，記得使用``
    @Insert("INSERT INTO `order` VALUES (NULL, #{amount}, #{address}, 1, NOW(), NOW())")
    int addOrder(@Param("amount") Double amount, @Param("address") String address);

}

11、啟動(dòng)類(lèi)

@SpringBootApplication
@MapperScan("com.yys.mapper")
public class YysApp {

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

}

12班缰、初始化sql文件

-- Database：yys_user

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'ID贤壁，自增列',
  `name` varchar(32) NOT NULL COMMENT '用戶名',
  `age` int(11) NOT NULL COMMENT '用戶年齡',
  `status` tinyint(2) NOT NULL DEFAULT '1' COMMENT '狀態(tài)：-1-刪除；1-正常鲁捏；',
  `create_time` datetime NOT NULL COMMENT '創(chuàng)建時(shí)間',
  `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時(shí)間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4;

-- Database：yys_order

DROP TABLE IF EXISTS `order`;
CREATE TABLE `order` (
  `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'ID芯砸，自增列',
  `amount` double(11,2) NOT NULL COMMENT '訂單金額',
  `address` varchar(32) NOT NULL COMMENT '地址',
  `status` tinyint(2) NOT NULL DEFAULT '1' COMMENT '狀態(tài)：-1-刪除萧芙；1-正常给梅；',
  `create_time` datetime NOT NULL COMMENT '創(chuàng)建時(shí)間',
  `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時(shí)間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4;

13、測(cè)試

http://localhost:8080/add/user?name=古猿&age=0&amount=12.02&address=南方

a双揪、頁(yè)面結(jié)果 - 如下圖所示 ：

b动羽、數(shù)據(jù)庫(kù)結(jié)果 - 如下圖所示 ：

http://localhost:8080/add/user?name=古猿&age=18&amount=12.02&address=南方

a、頁(yè)面結(jié)果 - 如下圖所示 ：

b渔期、數(shù)據(jù)庫(kù)結(jié)果 - 如下圖所示 ：