Atomikos是一个为Java平台提供增值服务的并且开源类事务管理器，如果将事务统一注册到Atomikos中，则可以统一管理。常用于后台管理系统的多数据库操作。
多数据源的划分方式
方式： a、按包名 b、按注解区分
Springboot默认集成事务,只主要在方法上加上@Transactional即可，不需要开启@EnableTransactionManagement注解
如果多个数据库，则每个方法都需要单独设置事务管理器@Transactional(transactionManager = "test2TransactionManager")，如果事务中含多数据源则无效。
Atomikos使用
1.依赖引入
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< dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-jta-atomikos</ artifactId > </ dependency > |
2.多数据源配置文件
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# Mysql 1 mysql.datasource.test1.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8 mysql.datasource.test1.username = root mysql.datasource.test1.password = root 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://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8 mysql.datasource.test2.username =root mysql.datasource.test2.password =root 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 |
3.配置代码
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@Data @ConfigurationProperties (prefix = "mysql.datasource.test1" ) public class DBConfig1 { private String url; 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; }
@Data @ConfigurationProperties (prefix = "mysql.datasource.test2" ) public class DBConfig2 { private String url; 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; }
@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 = "com.itmayiedu.test01" , sqlSessionTemplateRef = "testSqlSessionTemplate" ) public class MyBatisConfig1 {
// 配置数据源 @Primary @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 );
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; }
@Primary @Bean (name = "testSqlSessionFactory" ) public SqlSessionFactory testSqlSessionFactory( @Qualifier ( "testDataSource" ) DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); return bean.getObject(); }
@Primary @Bean (name = "testSqlSessionTemplate" ) public SqlSessionTemplate testSqlSessionTemplate( @Qualifier ( "testSqlSessionFactory" ) SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
@Configuration @MapperScan (basePackages = "com.itmayiedu.test02" , 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); } } |
4.启动加载配置
@EnableConfigurationProperties(value = { DBConfig1.class, DBConfig2.class })
使用还是正常使用@Transactional方式
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