java - 单个 Spring @Transaction 中的两个 dao 方法

Question

我正在将 Spring 的 @Transactional 与 Hibernate 一起使用。我试图将两个 dao 方法放入一个事务中，并希望在特定异常时回滚。代码如下:

服务类方法:

@Transactional(propagation=Propagation.REQUIRES_NEW,value="txManager",rollbackFor=TransactionUnSuccessException.class)
public Account makeTransaction(Transaction transaction, String userName)
        throws TransactionUnSuccessException {
    Account account = null;
    account = transferDao.makeTransaction(transaction, userName);
    return account;
}

道方法:

@Repository
public class TransferDao extends HibernateDaoSupport {
@Autowired
private SessionFactory sessionFactory;



public Account makeTransaction(Transaction transaction, String userName)
        throws TransactionUnSuccessException {
    HibernateTemplate hibernateTemplate = getHibernateTemplate();
    Account account = null;
    Session session = hibernateTemplate.getSessionFactory().openSession();
    //session.beginTransaction();
    updateSelfAccount(transaction, userName, session);
    account = updateAnotherAcccount(transaction, session);
    //session.getTransaction().commit();
    return account;
}

private void updateSelfAccount(Transaction transaction, String userName,
        Session session) {
    User currentUser = null;
    System.out.println("TransferDao.updateSelfAccount()" + transaction);

    Query query = session.createQuery("from User where userName=:userName");
    query.setParameter("userName", userName);
    currentUser = (User) query.list().get(0);

    currentUser.getAccount().getTransactions().add(transaction);
    currentUser.getAccount().setAvailableBalance(
            currentUser.getAccount().getAvailableBalance()
                    - transaction.getAmount());
    transaction.setTransAccount(currentUser.getAccount());
    session.save(transaction);
    session.update(currentUser.getAccount());
    session.update(currentUser);


private Account updateAnotherAcccount(Transaction transaction,
        Session session) throws TransactionUnSuccessException {

       Account account = null;
    try {
        Query query = session
                .createQuery("from Account where accNo=:accNo");
        query.setParameter("accNo", transaction.getToAcc());
        account = (Account) query.list().get(0);
        if (account.getAvailableBalance() < 5000) {
            account.setAvailableBalance(account.getAvailableBalance()
                    + transaction.getAmount());
            account.getTransactions().add(transaction);
            transaction.setTransAccount(account);
            session.save(transaction);
            session.update(account);
        } else {
            throw new TransactionUnSuccessException();
        }
    } catch (TransactionUnSuccessException te) {
        te.printStackTrace();
    }

    return account;
}
}
}

XML配置:

<tx:annotation-driven transaction-manager="txManager"/>
   <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
   </bean>

如果两个方法(updateSelfAccount、updateAnotherAcccount)中的任何一个失败，则整个事务应该回滚。但它无法回滚给定的异常，即使我不确定这一切都发生在单个事务中。请纠正我。

Answer 1

使用 @Transactional 注释的目标是您的代码不应处理事务本身。在您的代码示例中，您使用@Transactional，因此您不必执行类似的事情

session.beginTransaction();

您是否正确设置了 spring 的其他内容

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

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

通常sessionFactory是dao中的@Autowired，以便轻松访问您所做的 session

sessionFactory.getCurrentSession()

最后一点，您不需要进行大量的 try catch，然后抛出 TransactionUnSuccessException ，默认情况下，事务将在出现任何异常时回滚。