1 Reply Latest reply on Nov 1, 2011 12:18 AM by Jason Porter

    SEAM 3 PERSISTENCE JPA JTA HIBERNATE

    tehackio teha Newbie
      I'm using seam 3 persistence, hibernate 4xx, JTA, JBOSS as 7, weld, richfaces 4.0.Final

      My problem is: detached entity passed to persist;
      It happens because each method executes in transaction, so, causes persistence context has been detached.
      I wanna call "public void setCurrentId(String id){", set instance by entitymanager find, edit on my jsf2.0 form, and then, persit to the database.

      My relevant code:

      @Named("myHome")
      @ViewScoped
      public class MyHome extends AbstractHome<fooEntity>{
      ..

      @Inject
      private DAO<fooEntity> dao;

      public void setCurrentId(String id){
        getDao().newInstance();
        getDao().setCurrentId(id);
        getDao().setInstance((fooEntity) getEntityManager().find(fooEntity.class, getDao().getId()));
      }
      ..
      }//end myHome

      public abstract class AbstractHome<T> implements Serializable {
      private static final long serialVersionUID = 1L;

        @PersistenceContext(type=PersistenceContextType.EXTENDED)
        private EntityManager entityManager;
      ...
        public EntityManager getEntityManager() {
          return this.entityManager;
        }
      ...
      }//end AbstractHome

      public class DAOFactory<T> implements Serializable {
      private static final long serialVersionUID = 1L;

        @ExtensionManaged
        @PersistenceContext(type=PersistenceContextType.TRANSACTION)
        private EntityManager em;

        @Produces
        public DAO<T> create(InjectionPoint injectionPoint) {
          ParameterizedType type = (ParameterizedType) injectionPoint.getType();
          Class classe = (Class) type.getActualTypeArguments()[0];
          DAO<T> dao = new DAO<T>(classe, this.em);
          return dao;
        }

      }//end DAOFactory

      public class DAO<T>
      ...
      public void save() {
        getEntityManager().joinTransaction();
        getEntityManager().persist(getInstance());
      }
      ..
      }//end DAO<T>
        • 1. Re: SEAM 3 PERSISTENCE JPA JTA HIBERNATE
          Jason Porter Master

          Seems to me like you're using EJBs, which would cause this problem, you could try



          1. use an extended persistence context,

          2. you could also inject the UserTransaction and manually handle the transaction boundaries

          3. use declarative transactions from Seam Transactions.



          Try one of those approaches and let us know if you still have problems.