Question

一个简单的spring服务，其方法是在插入后执行插入和抛出运行时异常。运行时异常应该导致回滚。

@Transactional()
public void insertAndThrowRuntimeEx()  {

    Order order = new Order();

    entityManager.persist(order);

    throw new RuntimeException("Unexpected runtime exception");

}

仅当我使用以下命令配置dataSource时，才能正确显示回滚：

<jdbc:embedded-database id="dataSource" type="H2" /> <!-- with this configuration there is correct rollback -->

但是当我在独立模式下使用数据库时，没有回滚，或者回滚无效：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"    <!-- here inserted record remains in database -->
    p:driverClassName="org.h2.Driver" p:url="jdbc:h2:tcp://localhost/databases/test1"
    p:username="sa" p:password="" />

为什么事务回滚在H2嵌入式数据库模式下可以正常工作，但在服务器模式下却不能正常工作？

PS，还配置了事务管理器

    @Bean
public PlatformTransactionManager transactionManager() {
    JpaTransactionManager manager = new JpaTransactionManager( localContainerEntityManagerFactoryBean().getObject() );
    return manager;
}

    <tx:annotation-driven transaction-manager="transactionManager" />

spring debug log表示事务已回退：

现在抛出运行时异常

2014-07-03 20:02:05,965 TRACE [org.springframework.transaction.interceptor.TransactionInterceptor] - Completing transaction for [com.javatech.training.OrderServiceImpl.insertAndThrowRuntimeEx] after exception: java.lang.RuntimeException: Unexpected runtime exception
2014-07-03 20:02:05,965 TRACE [org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] - Applying rules to determine whether transaction should rollback on java.lang.RuntimeException: Unexpected runtime exception
2014-07-03 20:02:05,965 TRACE [org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] - <Winning rollback rule is: null>
2014-07-03 20:02:05,965 TRACE [org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] - No relevant rollback rule found: applying default rules
2014-07-03 20:02:05,965 TRACE [org.springframework.orm.jpa.JpaTransactionManager] - Triggering beforeCompletion synchronization
2014-07-03 20:02:05,965 DEBUG [org.springframework.orm.jpa.JpaTransactionManager] - Initiating transaction rollback
2014-07-03 20:02:05,965 DEBUG [org.springframework.orm.jpa.JpaTransactionManager] - Rolling back JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@1affcbf9]
2014-07-03 20:02:05,966 TRACE [org.springframework.orm.jpa.JpaTransactionManager] - Triggering afterCompletion synchronization
2014-07-03 20:02:05,966 TRACE [org.springframework.transaction.support.TransactionSynchronizationManager] - Clearing transaction synchronization
2014-07-03 20:02:05,966 TRACE [org.springframework.transaction.support.TransactionSynchronizationManager] - Removed value [org.springframework.orm.jpa.EntityManagerHolder@2f216eaf] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@3be9bb55] from thread [main]
2014-07-03 20:02:05,966 TRACE [org.springframework.transaction.support.TransactionSynchronizationManager] - Removed value [org.springframework.jdbc.datasource.ConnectionHolder@412eb15f] for key [org.apache.commons.dbcp.BasicDataSource@24915432] from thread [main]
2014-07-03 20:02:05,966 DEBUG [org.springframework.orm.jpa.JpaTransactionManager] - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@1affcbf9] after transaction
2014-07-03 20:02:05,966 DEBUG [org.springframework.orm.jpa.EntityManagerFactoryUtils] - Closing JPA EntityManager
CATCH Exception: Unexpected runtime exception

在我看来，h2独立模式还有......

Answer 1

需要dataSource

的事务管理器bean定义

对于本地资源事务管理器;

<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource"/>
</bean>

对于JTA事务管理器，请参阅更多spring doc here

Answer 2

在独立模式下H2存在问题。使用mysql的相同代码和配置按预期工作（事务上，使用回滚）。

使用Spring，为什么H2事务回滚可以在嵌入式数据库模式下正常工作，但不能在服务器模式下工作？

2 个答案: