HibernateTemplate 、 bulkUpdate 和刷新模式

Question

我们在我当前的项目中为我们的 dao 使用 hibernateTemplate。我有一种情况，如果事务中的任何一个操作失败（不是火箭科学，对吗？），我想要一个回滚事务。所以基本上，方法如下：

    // Reserve a deal and add the 'pending order' all in one transaction
@Transactional(propagation = Propagation.REQUIRES_NEW)
private MyUserOrder reserveQuantity(MyUserOrder userOrder, Date updatedOn) throws MyAPIException{

    userOrder.setOrderStatus(OrderStatus.PENDING);
    int orderReserved = orderDao.reserveQuantity(userOrder);

    //for some reason hibernate is flushing on the above line???

    if (dealsReserved < 1)
            throw new MyAPIException(ExceptionCode.INSUFFICIENT_QUANTITY);

    userOrder = userOrderDao.save(userOrder);

    //hibernate flushes again!

    return userOrder;
}

所以，基本上我们从数据库订单可用性表中保留 X 个订单......然后将待处理订单保存到数据库中。我希望两个语句在同一个事务中执行，所以如果一个失败，它们都会回滚。不幸的是，看起来 .reserveQuantity 的语句正在立即提交，即使整个方法应该在它自己的事务中运行。

这是日志..

    13:09:28.007 [5253145@qtp-25442933-1] DEBUG org.hibernate.impl.SessionImpl - opened session at timestamp: 13291529680
13:09:28.008 [5253145@qtp-25442933-1] DEBUG o.s.o.hibernate3.SessionFactoryUtils - Registering Spring transaction synchronization for new Hibernate Session
13:09:28.009 [5253145@qtp-25442933-1] DEBUG o.s.orm.hibernate3.HibernateTemplate - Found thread-bound Session for HibernateTemplate
13:09:28.011 [5253145@qtp-25442933-1] DEBUG org.hibernate.jdbc.AbstractBatcher - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
13:09:28.011 [5253145@qtp-25442933-1] DEBUG org.hibernate.jdbc.ConnectionManager - opening JDBC connection
13:09:28.012 [5253145@qtp-25442933-1] DEBUG o.s.j.d.DriverManagerDataSource - Creating new JDBC DriverManager Connection to [jdbc:db2://172.26.10.144:60000/devdb]
13:09:28.189 [5253145@qtp-25442933-1] DEBUG org.hibernate.SQL - update deal set remaining_quantity=remaining_quantity-?, updated_on=?, updated_by=? where id=? and remaining_quantity>=?
13:09:28.242 [5253145@qtp-25442933-1] DEBUG org.hibernate.jdbc.AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
13:09:28.243 [5253145@qtp-25442933-1] DEBUG org.hibernate.jdbc.ConnectionManager - transaction completed on session with on_close connection release mode; be sure to close the session to release JDBC resources!
13:09:28.244 [5253145@qtp-25442933-1] DEBUG o.s.orm.hibernate3.HibernateTemplate - Not closing pre-bound Hibernate Session after HibernateTemplate
13:09:28.245 [5253145@qtp-25442933-1] DEBUG o.s.o.hibernate3.SessionFactoryUtils - Flushing Hibernate Session on transaction synchronization
13:09:28.246 [5253145@qtp-25442933-1] DEBUG o.s.o.hibernate3.SessionFactoryUtils - Registering Hibernate Session for deferred close
13:09:30.524 [5253145@qtp-25442933-1] DEBUG o.s.o.hibernate3.SessionFactoryUtils - Opening Hibernate Session
13:09:30.525 [5253145@qtp-25442933-1] DEBUG org.hibernate.impl.SessionImpl - opened session at timestamp: 13291529705
13:09:30.534 [5253145@qtp-25442933-1] DEBUG o.h.e.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress
13:09:30.537 [5253145@qtp-25442933-1] DEBUG o.h.e.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress
13:09:30.540 [5253145@qtp-25442933-1] DEBUG o.h.e.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress
13:09:30.543 [5253145@qtp-25442933-1] DEBUG o.h.e.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress
13:09:30.549 [5253145@qtp-25442933-1] DEBUG o.h.e.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress
13:09:30.551 [5253145@qtp-25442933-1] DEBUG o.s.orm.hibernate3.HibernateTemplate - Eagerly flushing Hibernate session
13:09:30.552 [5253145@qtp-25442933-1] DEBUG o.h.e.d.AbstractFlushingEventListener - processing flush-time cascades
13:09:30.554 [5253145@qtp-25442933-1] DEBUG o.h.e.d.AbstractFlushingEventListener - dirty checking collections
13:09:30.556 [5253145@qtp-25442933-1] DEBUG org.hibernate.engine.Collections - Collection found: [<redacted>.UserOrder.dealOrderSet#<delayed:8>], was: [<unreferenced>] (initialized)
13:09:30.558 [5253145@qtp-25442933-1] DEBUG o.h.e.d.AbstractFlushingEventListener - Flushed: 5 insertions, 0 updates, 0 deletions to 5 objects
13:09:30.559 [5253145@qtp-25442933-1] DEBUG o.h.e.d.AbstractFlushingEventListener - Flushed: 1 (re)creations, 0 updates, 0 removals to 1 collections

如您所见，发生了两次刷新操作.. 一次大约在日志的一半（当我保留时），另一次在我尝试保存 order bean 时结束。这是我的数据源配置。

    <bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dealsdbDataSource" />
    <property name="packagesToScan" value="<redacted>.common"/>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.archive.autodetection">class</prop>
            <prop key="hibernate.show_sql">${hibernate-show-sql}</prop>
            <prop key="hibernate.format_sql">false</prop>
            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
            <prop key="hibernate.hbm2ddl.import_files">${hibernate.hbm2ddl.import_files}</prop>
        </props>
    </property>
</bean>

<bean id="hibernateTemplate" name="hibernateTemplate"
    class="org.springframework.orm.hibernate3.HibernateTemplate">
    <constructor-arg ref="sessionFactory" />               
</bean>

<bean id="transactionManager"
    class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

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

另外经过调查，我的刷新模式在 hibernateTemplate 中似乎是 AUTO。

有什么想法吗？？

Answer 1

您能否检查一下，如果您在 orderDao 类中声明了@Transactional。 我想这可能是原因。

最佳实践是在服务层使用@Transactional，而在 DAO 层不使用。