0 Replies Latest reply on Apr 13, 2010 2:08 PM by Wujek Srujek

    Questions on Instance<DependentBean>, dependent beans and disposer methods

    Wujek Srujek Newbie
      Hi. We have the following structure:

      public class SomeClass {

          @Inject private DaoFactory factory;
      ...
      }

      @ApplicationScoped
      public class DaoFactory {

          @Inject
          private Instance<EntityManager> entityManagers;
      ...
      }

      @ApplicationScoped
      @Alternative
      public class TestEntityManagerProducer {

          @Inject
          private EntityManagerFactory factory;

          @Produces
          public EntityManager produceEntityManager() {
              return factory.createEntityManager();
          }

          public void disposeEntityManager(@Disposes EntityManager em) {
              em.close();
          }
      }

      SomeClass is a client that used a application scoped DAOFactory to create DAO instances. The factory has an EntityManager injected that is produced by TestEntityManagerProducer.produceEntityManager() and the EntityManagers are dependent. There also exists a disposer method.

      1. I assume, and this is what I observe, that by using Instance<EntityManager> (EM being a dependent instance), whenever I call Instance<>.get() I get a fresh EM instance. Is this correct? Is this a valid use case for the build-in Instance<> bean?

      2. On which bean instance are the @Dependent EntityManager dependent on? On the bean that produced them or on the bean that has them injected?

      3. I noticed that the disposer method for EntityManagers is not called when the application shuts down. I found this issue: https://jira.jboss.org/jira/browse/WELD-466. Is this the same one?

      Regards,
      wujek