How to instantiate a single EntityManager in an interceptor?

jbchurn · **Posted:** Mon Apr 28, 2008 12:47 am

Hi,

I'm using:
hibernate-3.2.6.GA
hibernate-entitymanager-3.3.2.GA

How to instantiate a single EntityManager in an interceptor?

Hibernate's OpenSession() method does take parameter of type "Interceptor", but createEntityManager() doesn't.

Please advise.

Below is the code for interceptor. I'm trying to convert HibernateUtil so that I can use JPA EntityManagerFactory and EntityManager. In HibernateUtil, I instantiate like below. But don't know how when come to createEntityeManager

Code:

s = getSessionFactory().openSession(getInterceptor());

Code:

   /**
    * Register a Hibernate interceptor with the current thread.
    * <p>
    * Every Session opened is opened with this interceptor after
    * registration. Has no effect if the current Session of the
    * thread is already open, effective on next close()/getSession().
    */
   public static void registerInterceptor(Interceptor interceptor) {
      threadInterceptor.set(interceptor);
   }

   private static Interceptor getInterceptor() {
      Interceptor interceptor =
         (Interceptor) threadInterceptor.get();
      return interceptor;
   }

Regards,
Jap.

hardy.ferentschik · **Posted:** Tue Apr 29, 2008 2:56 am

Hi,

Interceptors are really a Hibernate specific feature and not part of JPA. Hence, there is no way to specify an interceptor in EnitityManagerFactory. However, you can add the property hibernate.ejb.interceptor to your persistence.xml and specify a shared interceptor. This interceptor must be thread safe though. Check the Hibernate EntityManager documentation.

There are probably other solutions to your problem as depending on what you want to achieve.

--Hardy