spring悲观锁定
我有java下的spring项目,使用hibernate查询,我喜欢使用悲观锁定。
如何在Spring + Hibernate中进行悲观锁定?
编辑:
@Loggable(value = LogLevel.TRACE) @Transactional @Override public void updateBalance(String id, BigDecimal amount) { Session session = sessionFactory.getCurrentSession(); sessionFactory.openSession(); Transaction tx = session.beginTransaction(); session.flush(); Account acc = (Account) session.get(Account.class, id, LockMode.UPGRADE); acc.setName("New Account"); acc.setBalance(acc.getBalance().subtract(amount)); save(acc); try{ tx.commit(); }catch (TransactionException e){ tx.rollback(); } session.close(); }
问题:
我想在方法中使用悲观锁定,并且我从不同的方法中调用此方法。 当我从第一种方法调用它时,悲观的工作正常,但当我从第二种方法调用它时,它给出了(事务无法提交)
例外:
Could not commit Hibernate transaction; nested exception is org.hibernate. TransactionException: Transaction not successfully started
http://www.amicabile.com/hybernate/hybernate-chapter5.html
http://javacompleteexamples.blogspot.com/2009/07/how-db-locking-system-works-in.html
编辑:
尝试:
@Override @Loggable(value = LogLevel.TRACE) @Transactional public void updateBalance(String id, BigDecimal amount) { Account acc = (Account) sessionFactory.getCurrentSession().get(Account.class, id, LockMode.UPGRADE); acc.setBalance(acc.getBalance().subtract(amount)); save(acc); }