分布式系统-分布式事务05（springboot+atomiks

springboot 项目在使用分布式事务开源框架，atomiks

pom

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>org.springframework.boot</artifactId>
</dependency>

application.properties（双数据源配置）

# Mysql 1
mysql.datasource.test1.url = jdbc:mysql://192.168.25.11:3306/18-08-12-manyDatasource1?useUnicode=true&characterEncoding=utf-8
mysql.datasource.test1.username = root
mysql.datasource.test1.password = @sS19980713
mysql.datasource.test1.minPoolSize = 3
mysql.datasource.test1.maxPoolSize = 25
mysql.datasource.test1.maxLifetime = 20000
mysql.datasource.test1.borrowConnectionTimeout = 30
mysql.datasource.test1.loginTimeout = 30
mysql.datasource.test1.maintenanceInterval = 60
mysql.datasource.test1.maxIdleTime = 60
 
# Mysql 2
mysql.datasource.test2.url =jdbc:mysql://192.168.25.11:3306/18-08-12-manyDatasource2?useUnicode=true&characterEncoding=utf-8
mysql.datasource.test2.username =root
mysql.datasource.test2.password =@sS19980713
mysql.datasource.test2.minPoolSize = 3
mysql.datasource.test2.maxPoolSize = 25
mysql.datasource.test2.maxLifetime = 20000
mysql.datasource.test2.borrowConnectionTimeout = 30
mysql.datasource.test2.loginTimeout = 30
mysql.datasource.test2.maintenanceInterval = 60
mysql.datasource.test2.maxIdleTime = 60

创建配置bean对象

/**
 * 将application.properties配置文件中配置自动封装到实体类字段中
 * @author Administrator
 */
@Data
@ConfigurationProperties(prefix = "mysql.datasource.test1") // 注意这个前缀要和application.properties文件的前缀一样
public class DBConfig1 {
    private String url;
    // 比如这个url在properties中是这样子的mysql.datasource.test1.username = root
    private String username;
    private String password;
    private int minPoolSize;
    private int maxPoolSize;
    private int maxLifetime;
    private int borrowConnectionTimeout;
    private int loginTimeout;
    private int maintenanceInterval;
    private int maxIdleTime;
    private String testQuery;
}

/**
 * 将application.properties配置文件中配置自动封装到实体类字段中
 * @author Administrator
 */
@Data
@ConfigurationProperties(prefix = "mysql.datasource.test2")// 注意这个前缀要和application.properties文件的前缀一样
public class DBConfig2 {
    private String url;
    // 比如这个url在properties中是这样子的mysql.datasource.test1.username = root
    private String username;
    private String password;
    private int minPoolSize;
    private int maxPoolSize;
    private int maxLifetime;
    private int borrowConnectionTimeout;
    private int loginTimeout;
    private int maintenanceInterval;
    private int maxIdleTime;
    private String testQuery;
}

创建Datasource,SqlSessionFactory,SqlSessionTemplate等对象

@Configuration
// basePackages 最好分开配置 如果放在同一个文件夹可能会报错
@MapperScan(basePackages = "czs.mapper1", sqlSessionTemplateRef = "testSqlSessionTemplate")
public class MyBatisConfig1 {
 
    // 配置数据源
    @Bean(name = "testDataSource")
    public DataSource testDataSource(DBConfig1 testConfig) throws SQLException {
        MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
        mysqlXaDataSource.setUrl(testConfig.getUrl());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
        mysqlXaDataSource.setPassword(testConfig.getPassword());
        mysqlXaDataSource.setUser(testConfig.getUsername());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
 
        // 将本地事务注册到创 Atomikos全局事务
        AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
        xaDataSource.setXaDataSource(mysqlXaDataSource);
        xaDataSource.setUniqueResourceName("testDataSource");
 
        xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());
        xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());
        xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());
        xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());
        xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());
        xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());
        xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());
        xaDataSource.setTestQuery(testConfig.getTestQuery());
        return xaDataSource;
    }
 
    @Bean(name = "testSqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("testDataSource") DataSource dataSource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        return bean.getObject();
    }
 
    @Bean(name = "testSqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(
            @Qualifier("testSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

@Configuration
@MapperScan(basePackages = "czs.mapper2", sqlSessionTemplateRef = "test2SqlSessionTemplate")
public class MyBatisConfig2 {
 
    // 配置数据源
    @Bean(name = "test2DataSource")
    public DataSource testDataSource(DBConfig2 testConfig) throws SQLException {
        MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
        mysqlXaDataSource.setUrl(testConfig.getUrl());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
        mysqlXaDataSource.setPassword(testConfig.getPassword());
        mysqlXaDataSource.setUser(testConfig.getUsername());
        mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
 
        AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
        xaDataSource.setXaDataSource(mysqlXaDataSource);
        xaDataSource.setUniqueResourceName("test2DataSource");
 
        xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());
        xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());
        xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());
        xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());
        xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());
        xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());
        xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());
        xaDataSource.setTestQuery(testConfig.getTestQuery());
        return xaDataSource;
    }
 
    @Bean(name = "test2SqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        return bean.getObject();
    }
 
    @Bean(name = "test2SqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(
            @Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

使用mybaties，不同的扫描路径使用不同的sqlsessionTemplate

@MapperScan(basePackages = "czs.mapper1", sqlSessionTemplateRef = "test1SqlSessionTemplate")
@MapperScan(basePackages = "czs.mapper2", sqlSessionTemplateRef = "test2SqlSessionTemplate")

在service中使用

@Service
public class ManyService1 {
 
    @Autowired
    private UserMapper1 userMapper1;
 
    @Autowired
    private UserMapper2 userMapper2;
 
    // 开启事务，由于使用jta+atomikos解决分布式事务，所以此处不必再指定事务
    @Transactional
    public int insert(String name, Integer age) {
        int insert = userMapper1.insert(name, age);
        int i = 1 / age;// 赋值age为0故意引发事务
        return insert;
    }
 
    // 开启事务，由于使用jta+atomikos解决分布式事务，所以此处不必再指定事务
    @Transactional
    public int insertDb1AndDb2(String name, Integer age) {
        int insert = userMapper1.insert(name, age);
        int insert2 = userMapper2.insert(name, age);
        int i = 1 / age;// 赋值age为0故意引发事务
        return insert + insert2;
    }