我在java下使用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?
修改
@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,但是当我从第二种方法调用它时,它给出了(Transaction无法提交)
例外:
Could not commit Hibernate transaction; nested exception is org.hibernate.
TransactionException: Transaction not successfully started
答案 0 :(得分:3)
http://www.amicabile.com/hybernate/hybernate-chapter5.html
http://javacompleteexamples.blogspot.com/2009/07/how-db-locking-system-works-in.html
修改
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);
}