声明性春季事务未提交

Question

我有以下服务类别：

public class UserLoginServiceImpl implements UserLoginService {

  private UserDAO dao;

  public UserLoginServiceImpl(UserDAO dao) {this.dao = dao; }

  public User login(String userName, String password) {
     User u = dao.findUserByCredentials(userName, password);
     if (u == null) {
         throw new UserNotFoundException();
     }
     return u;
}

public class UserManagementServiceImpl implements UserManagementService {

  private UserDAO dao;

  public UserManagementServiceImpl(UserDAO dao) { this.dao = dao; }

  public void createUser(User u) {
     dao.save(u);
  }
}

我的服务接口位于 com.mysystem.services 包下，我的服务实现位于 com.mysystem.services.impl 包下。

我在 spring 中使用 hibernate 作为我的 jpa 实现和声明性事务。我的配置文件如下：

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="*"/>
    </tx:attributes>
</tx:advice>

<aop:config>
    <aop:pointcut id="serviceMethod" expression="execution(* com.mysystem.services.impl.*.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
</aop:config>

<!--
    Beans
 -->
<bean id="userDao" class="com.mysystem.dao.UserDAOImpl">
    <constructor-arg ref="entityManagerFactory" />
</bean>

<bean id="userLoginService" class="com.mysystem.services.impl.UserLoginServiceImpl">
    <constructor-arg ref="userDao" />
</bean>
<bean id="userManagementService" class="com.mysystem.services.impl.UserManagementServiceImpl">
    <constructor-arg ref="userDao" />
</bean>

最后，在我的代码中某处我运行以下内容：

UserManagementService userManagementService = context.getBean(UserManagementService.class);
userManagementService.createUser(new User("test", "test"));

UserLoginService userLogginService = context.getBean(UserLoginService.class);
User user = userLogginService.login("test", "test");

这会导致 login() 方法抛出 UserNotFoundException，因为它无法找到之前由 createUser() 插入的用户，这意味着hibernate 不会刷新方法调用之间的会话。我可以从控制台输出验证这个表单（我可以看到 hibernate 的 create 和 select 语句，但看不到 insert）。

为什么在调用 createUser() 后没有立即提交事务？我在这里做错了什么？

编辑：

使用@Transactional 注释而不是声明性事务有效。但是，使用 @Transactional 对我来说不是一个选择。我需要实现声明式事务。

下面是spring的调试输出：

13:03:18,174 DEBUG [main] jpa.JpaTransactionManager     - Creating new transaction with name [com.mysystem.services.impl.UserManagementServiceImpl.createUser]: PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT
13:03:18,175 DEBUG [main] jpa.JpaTransactionManager     - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@1af6a711] for JPA transaction
Hibernate: 
    select
        nextval ('hibernate_sequence')
13:03:18,255 DEBUG [main] jpa.JpaTransactionManager     - Initiating transaction commit
13:03:18,255 DEBUG [main] jpa.JpaTransactionManager     - Committing JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@1af6a711]
13:03:18,256 DEBUG [main] jpa.JpaTransactionManager     - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@1af6a711] after transaction

    13:03:18,263 DEBUG [main] jpa.JpaTransactionManager     - Creating new transaction with name [com.mysystem.services.impl.UserLoginServiceImpl.login]: PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT
    13:03:18,263 DEBUG [main] jpa.JpaTransactionManager     - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@1533badd] for JPA transaction
    Hibernate: 
        /* 
    from
        com.mysystem.domain.User u 
    where
        u.userName = :userName 
        and u.password = :password */ select
            user0_.id as id0_,
            user0_.password as password0_,
            user0_.userName as userName0_ 
        from
            Users user0_ 
        where
            user0_.userName=? 
            and user0_.password=? limit ?
    13:03:18,374 TRACE [main] sql.BasicBinder     - binding parameter [1] as [VARCHAR] - test
    13:03:18,374 TRACE [main] sql.BasicBinder     - binding parameter [2] as [VARCHAR] - test
    13:03:18,379 DEBUG [main] jpa.JpaTransactionManager     - Initiating transaction commit
    13:03:18,379 DEBUG [main] jpa.JpaTransactionManager     - Committing JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@1533badd]
    13:03:18,379 DEBUG [main] jpa.JpaTransactionManager     - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@1533badd] after transaction

Answer 1

你能试试这个吗？

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>

        <tx:method name="createUser" propagation="REQUIRES_NEW" />
    </tx:attributes>
</tx:advice>