如何hibernate sessionfactory管理会话？ [英] how does hibernate sessionfactory manage session?

问题描述

全部！我刚刚得到了Hibernate Session和Connection之间的关系。
但是现在，我得到另一个问题：hibernate sessionfactory如何管理会话？
在以下代码段中：DAO类的save（）方法：

all! I have just got the relationship between Hibernate Session and Connection. But now, I get another question: how does hibernate sessionfactory manage session? In the following code segment: save() method of a DAO class:

Session session = sessionFactory.openSession();
   Transaction tx=null;
   tx=session.beginTransaction(); 
   session.save(transientInstance);
   session.flush();
   tx.commit();

< ，它会创建一个新的会话附加到当前线程（通过ThreadLocal），这个会话也附加到一个JDBC连接，
但是，正如你所看到的，我们不需要关闭会话（session .close（）），既不是连接。
那么，什么是Hibernate会话的生命周期，在什么情况下它会被关闭？自动？

感谢高级。

When we call sessionFactory.openSession() , it will create a new session attached to the current thread (through the ThreadLocal), this session is also attached to a JDBC connection, But, as you can see, we don't need to close the session (session.close()), neither the connection. So, what is the lifecycle of a Hibernate session, in what circumstances it will be closed? automatically?
Thanks in advanced.

推荐答案

我推荐 getCurrentSession 方法，因为只有这种方法确保会话从hibernate中关闭的可能性

I recommend the getCurrentSession method because only with this method you have the possibility to be sure that the session will be closed from hibernate

配置J2EE当前会话

如果使用 openSession 方法，您必须自己关闭会话。
在我开始使用hibernate之后，我认为这并不重要我使用哪个方法，因为所有会话将自动关闭...我错了。
我从hibernate中发现了SessionStatistics
SessionStatistics
，打开的会话已经打开并且从未关闭。


在我改变所有调用 getCurrentSession 和 impl 。每次请求模式打开的会话将在工作后关闭。

If you use the openSession method, you must close the sessions by yourself. After i begin to work with hibernate i thought it does'n matter which method I use because all session will be closed automatically... i was wrong. I had discovered with the SessionStatistics from hibernate SessionStatistics that the open session was already opened and never closed.

After i changed all calls to getCurrentSession and impl. the Session-per-request pattern opened session will be closed after work.

交易基础。

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