Question

我是hibernate的新手。我想在迭代器中使用事务，所以我喜欢这样（没有业务逻辑）：

Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();
for {
    try {
        Something something = session.get(Something.class, id);
        something.setX(X);
        session.save(something)
        tx.commit(); <-- error occurs after iterated once.
    catch { tx.rollback(); }
}
Something something2 = session.get(Something.class, id2);
something2.setX(X);
session.save(something2);
tx.commit():
session.close();

但是hibernate发生了Transaction not successfully started错误

所以我改变了这样的代码。

Session session = sessionFactory.openSession();
Transaction tx;
for {
    try {
        tx = session.beginTransaction();
        Something something = session.get(Something.class, id);
        something.setX(X);
        session.save(something)
        tx.commit();
    catch { tx.rollback(); }
}
session.beginTransaction();
Something something2 = session.get(Something.class, id2);
something2.setX(X);
session.save(something2);
tx.commit():
session.close();

此代码第一次有效。但是当我重新启动这个程序时，会发生lock wait timeout exceeded 虽然我将innodb_lock_wait_timeout设置为120但结果是一样的那有什么不对！？

迭代中的Hibernate Transaction发生错误

0 个答案: