Howto retrieve the configuration at runtime?

vanos · **Joined:** Sun Apr 30, 2006 6:06 pm **Posts:** 1

After successfully setting up Hibernate Annotations and Entity manager, I need to retrieve the configuration (as read through e.g. the persistence.xml file) to list the classes that will be persisted.

I've look through the API doc's and some other documentation but am not able to find any clue. Does any of you have an answer?

@eyall: Thanks a lot. Solved my problem. (I'm still wondering what to do with non-Hibernate implementations however).

eyall · **Joined:** Wed Aug 24, 2005 5:32 am **Posts:** 23

Hi,
You can get the Hibernate session factory, on the session factory you can call the getAllClassMetadata() method, for example

Code:

      
HibernateEntityManager entityManager2 = (HibernateEntityManager)entityManager;
      SessionFactory factory = entityManager2.getSession().getSessionFactory();
      Map m = factory.getAllClassMetadata();
      Set<Map.Entry> s = m.entrySet(); 
      for (Map.Entry e : s) {
         System.out.println(e.getKey() + "--->" + e.getValue());
      }

eyall · **Joined:** Wed Aug 24, 2005 5:32 am **Posts:** 23

Hi,

You can get the Hibernate session factory, on this session factory you can invoke the getAllClassMetadata() method, for example

Code:

      
HibernateEntityManager entityManager2 = (HibernateEntityManager)entityManager;
SessionFactory factory = entityManager2.getSession().getSessionFactory();
Map m = factory.getAllClassMetadata();
Set<Map.Entry> s = m.entrySet(); 
for (Map.Entry e : s) {
      System.out.println(e.getKey() + "--->" + e.getValue());
}

will print:

Code:

par.common.Address--->SingleTableEntityPersister(par.common.Address)
par.common.Customer--->SingleTableEntityPersister(par.common.Customer)
par.common.Catalog--->SingleTableEntityPersister(par.common.Catalog)
par.common.Service--->SingleTableEntityPersister(par.common.Service)
par.common.InternalService--->SingleTableEntityPersister(par.common.InternalService)
par.common.ExternalServiceTwoProviders--->SingleTableEntityPersister(par.common.ExternalServiceTwoProviders)
par.common.Attribute--->SingleTableEntityPersister(par.common.Attribute)
par.common.ExternalService--->SingleTableEntityPersister(par.common.ExternalService)

If you don't want to get an entity manager and cast it to Hibernate entity manager, and get the session factory out of it. You can add to your persistence.xml the 'hibernate.session_factory_name' property and ask Hibernate to register the session factory to a JNDI (assuming that you have one).

Eyal Lupu

emmanuel · **Posted:** Mon May 01, 2006 4:28 pm

I thnik I'll provide the Configuration object available in JNDI

max · **Posted:** Tue May 02, 2006 3:25 am

but hopefully also available elsewhere in standalone programs ;)

emmanuel · **Posted:** Thu May 25, 2006 2:18 pm

Where?

max · **Posted:** Thu May 25, 2006 4:27 pm

((somemagiccast)entitymanager).getConfiguration() ? :)