How to build an EntityManagerFactory in JSE?

guofeng · **Joined:** Tue Dec 19, 2006 4:14 am **Posts:** 8

I used to use Spring with Hibernate in JSE. But now I need to only use Hibernate in JSE. I read the Hibernate Entity Manger reference and searched the internet, but I do not find how to create an entity manager factory in JSE.

Could you kindly tell me where to find the material to do it?

Thanks in advance.

andydale · **Posted:** Tue Jan 15, 2008 4:16 am

Hi,

I have done the following before

Code:

EntityManagerFactory factory = 
         Persistence.createEntityManagerFactory(pPersistenceUnitName);

The only thing you have to do to get the above to work is to have a META-INF folder in the classpath containing the persistence.xml

Cheers,

Andy

guofeng · **Joined:** Tue Dec 19, 2006 4:14 am **Posts:** 8

Thanks for your reply.

But the problem is that the JDBC connection is hard-coded in the xml file. It is difficult to change it by the user when the application is released to the user. We have a UI to let the user select the type of the database servers.

Can the properties file be used?

Thanks again.

andydale · **Posted:** Tue Jan 15, 2008 5:53 am

Hi,

I am not certian if properties can be used, but you can build an entitymanager factory programatically with an Ejb3Configuration object, this should give you the functionality you need.

Cheers,

Andy

emmanuel · **Posted:** Tue Jan 15, 2008 8:21 pm

yes hibernate.properties can be used.

emmanuel · **Posted:** Tue Jan 15, 2008 8:21 pm

I mean in conjunction with persistence.xml