When you say, strategies, what do you mean? Which ones are available and how
do I set them up?
thanks
On 8/17/07, Marina Vatkina <Marina.Vatkina_at_sun.com> wrote:
>
> Without the annotation the id will be null, because it's not set. With the
> annotation (depending on the strategy), you might need to call em.flush()
> after
> persist() before asking for the generated id.
>
> Regards,
> -marina
>
> Daniel Cavalcanti wrote:
> > I tried with and without that annotation...
> > The result was the same... the Id field had null!
> >
> > On 8/17/07, *Marina Vatkina* < Marina.Vatkina_at_sun.com
> > <mailto:Marina.Vatkina_at_sun.com>> wrote:
> >
> > Daniel,
> >
> > You do not have @GeneratedValue set on the @Id field. Who is
> > expected to
> > populate the value?
> >
> > thanks,
> > -marina
> >
> > Daniel Cavalcanti wrote:
> > >
> > > I have an EJB that persists, updates, removes, etc an entity...
> > (create
> > > using NetBeans).
> > > From another EJB, BeanB, I create an entity and use the BeanA to
> > persist.
> > >
> > > @Entity
> > > @Table(name = "resource_requests")
> > > public class ResourceRequests implements Serializable {
> > >
> > > @Id()
> > > @Column(name = "id", nullable = false)
> > > private BigInteger id;
> > >
> > > @Column(name = "start_date", nullable = false)
> > > @Temporal(TemporalType.DATE)
> > > private Date startDate;
> > >
> > > ...
> > >
> > > }
> > >
> > > @Stateless()
> > > public class ResourceRequestsBean
> > > implements ... {
> > >
> > > @PersistenceContext()
> > > private EntityManager em;
> > >
> > > public ResourceRequestsFacade() {
> > > }
> > >
> > > public void create(ResourceRequests entity) {
> > > em.persist(entity);
> > > }
> > >
> > > public ResourceRequests edit(ResourceRequests entity) {
> > > return em.merge(entity);
> > > }
> > >
> > > public void destroy(ResourceRequests entity) {
> > > entity = em.merge(entity);
> > > em.remove(entity);
> > > }
> > >
> > > ...
> > >
> > > }
> > >
> > >
> > > @Stateful()
> > > public class SomeBean
> > > implements ... {
> > >
> > > @EJB()
> > > private ResourceRequestsFacadeLocal resourceRequestsFacade;
> > >
> > > @EJB()
> > > private ResourcesFacadeLocal resourcesFacade;
> > >
> > > @EJB()
> > > private UsersFacadeLocal usersFacade;
> > >
> > > public void requestValet(Users user, String ticket) {
> > >
> > > //
> > >
> ******************************************************************
> > > // Data tier
> > > //
> > >
> ******************************************************************
> > >
> > > ResourceRequests request = new ResourceRequests();
> > >
> > > request.setStartDate (new Date(System.currentTimeMillis
> ()));
> > > request.setResourceId(valet);
> > > request.setUserId (user);
> > >
> > > valet.getResourceRequestsCollection().add(request);
> > > user.getResourceRequestsCollection ().add(request);
> > >
> > > resourceRequestsFacade.create(request);
> > > resourcesFacade.edit(valet);
> > > usersFacade.edit(user);
> > >
> > > request = resourceRequestsFacade.edit(request);
> > >
> > > //
> > >
> ******************************************************************
> > > // Messaging tier
> > > //
> > >
> ******************************************************************
> > >
> > > ...
> > >
> > > }
> > >
> > > }
> > >
> > > Now, in the code after the Messaging tier comments, I need the
> > request
> > > entity id... Which is still NULL.
> > > I've tried many different things, but I can't figure out how to
> > get the
> > > value persisted in the DB. Furthermore, I can't look that entity
> up
> > > because I don't have the PK?!?
> > >
> > > How can I do that?
> > >
> > >
> >
> >
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