FlushMode type Commit used with REQUIRES_NEW Transaction Attribute

Question

I'm developing with JBoss 7.1.1 Final, Weld, Hibernate 4, Seam 3 and I don't understand following behavior. I use Seam Managed Persistence Context for Entity managers and Persistence Interceptor from Seam 3. I have following CDI Bean:

 @ViewScoped
 @Named
 public class RegistrationController implements Serializable {

    @Inject
    private RegisterService service;

    @Inject
    private EntityManager em;

    public void register() {
          Person p = service.register("username","password");
          Person pp = em.find(Person.class, p.getId()); //returns null
    } 
 }

And following EJB

 @Stateless
 @Local(IRegisterService.class)
 public RegisterService implements IRegisterService {

      @Inject
      private EntityManager em;      

      @Override
      @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
      public Person register(String username, String password) {
           return em.merge(new Person(username, password));
      }
 }

So since I use Seam Persistence module I assume that this flow of operations will occur:

1) registrationController.register() is called from frontend

2) New transaction A is initiated

3) service.register(...) is called

4) Transaction A is suspended and transaction B is created for execution of service.register (since it is annotated by REQUIRES_NEW)

5) The execution service.register(...) is completed

6) Transaction B is committed

7) Since I use COMMIT flush type, flush will be called

8) Transaction A is opened back

Now, em.find(Person.class, p.getId()) is trying to find just persisted person. Since transaction B was committed and entity manager flushed, it should find it. But it returns null. If I do flush manually, then it works.

Where am I making mistake? Is there some misunderstanding?

Answer 1

From looking at your code I'd say - since RegistrationController is a ordinary managed bean - that it will not start its own transaction. This basically means that you have a single transaction B.