wood burning stoves 2.0
The moose likes Object Relational Mapping and the fly likes How bad is close EM always ? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of REST with Spring (video course) this week in the Spring forum!
JavaRanch » Java Forums » Databases » Object Relational Mapping
Bookmark "How bad is close EM always ?" Watch "How bad is close EM always ?" New topic

How bad is close EM always ?

Robert Siqueira
Ranch Hand

Joined: Jan 21, 2008
Posts: 38

I have the following entitymanager producer:

Is there any impact about always close the entitymanger after closed a transaction !??!!? Is there any performance issues ?


Bill Gorder

Joined: Mar 07, 2010
Posts: 1682

If you use dependency injection to get it using the @PersistenceContext annotation then you should not close it as this is handled for you. However if you are creating it from the factory as you are in your snippet then absolutely it is your responsibility to make sure it gets closed every time.

[How To Ask Questions][Read before you PM me]
I agree. Here's the link: http://aspose.com/file-tools
subject: How bad is close EM always ?
It's not a secret anymore!