在entitymanager上使用unwrap方法获得本地hibernate会话后，我是否必须关闭两者？ [英] After using the unwrap method on entitymanager to get the native hibernate session do I have to close both?

问题描述

pre $ this.entityManager = AppFactory.instance（）。getEntityManagerFactory（）。createEntityManager （）;
this.hibernateSession = entityManager.unwrap（Session.class）;
try {
//使用entityManager和hibernateSession
}做一些查询finally {
this.entityManager.close（）;
}


但是我好像有一处连接泄漏。我想知道是否应该关闭entityManager和hibernateSession。有没有其他人处理过这种情况？

解决方案

您不必关闭Session和EntityManger，在hibernate中实际上是hibernate Session。调用unwarp会传递给你底层Session。所以关闭其中一个是好的。

关于连接泄漏，看看我的答案以下问题，也许这是同一个问题。

I have code that looks like this.

 this.entityManager = AppFactory.instance().getEntityManagerFactory().createEntityManager();
 this.hibernateSession = entityManager.unwrap(Session.class);
 try{
 //do some queries using both entityManager and hibernateSession
 }finally{
 this.entityManager.close();
 }

But I seem to have a connection leak somewhere. I'm wondering if I am supposed to close both entityManager and hibernateSession. Has anybody else worked with this type of situation?

解决方案

You do not have to close both Session and EntityManger, under the hood EntityManger in hibernate is actually hibernate Session. Calling unwarp will pass you the underlying Session. So closing one of them is fine.
Regarding the connection leak, look at my answer to the following question, maybe it’s the same issue.

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