SpringBoot使用Atomikos技术整合多数据源的实现

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。

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。

1.依赖引入

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jta-atomikos</artifactId></dependency>

2.多数据源配置文件

# Mysql 1mysql.datasource.test1.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8mysql.datasource.test1.username = rootmysql.datasource.test1.password = rootmysql.datasource.test1.minPoolSize = 3mysql.datasource.test1.maxPoolSize = 25mysql.datasource.test1.maxLifetime = 20000mysql.datasource.test1.borrowConnectionTimeout = 30mysql.datasource.test1.loginTimeout = 30mysql.datasource.test1.maintenanceInterval = 60mysql.datasource.test1.maxIdleTime = 60# Mysql 2mysql.datasource.test2.url =jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8mysql.datasource.test2.username =rootmysql.datasource.test2.password =rootmysql.datasource.test2.minPoolSize = 3mysql.datasource.test2.maxPoolSize = 25mysql.datasource.test2.maxLifetime = 20000mysql.datasource.test2.borrowConnectionTimeout = 30mysql.datasource.test2.loginTimeout = 30mysql.datasource.test2.maintenanceInterval = 60mysql.datasource.test2.maxIdleTime = 60

3.配置代码

@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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