Seam+CDI Event Probleam - Observer does not work

[filosofisto]

Hi all,

I'm in trouble with Observers.

I have a superclass that fire event and another class responsible for observe the event, but it's not working.

My superclass:

public abstract class AbstractCrudModel<T> implements Serializable {

    @Inject

    @Update

    protected Event<T> evtUpdate;

    public String update() {

        T loaded = findSelectedById();

        if (loaded != null) {

            T t = doUpdate();

            if (t != null) {

                evtUpdate.fire(t);

            }

        } else {

            messages.warn(new BundleKey("messages", "registro_nao_encontrado_atualizacao"));

        }

        list = queryList();

        return crudController().urlBegin();

    }

}

My concrete model class:

@Stateful

@ConversationScoped

@Model

public class ManterTipoAutorizacaoModel extends AbstractCrudModel<TipoAutorizacao> {

    @Override

    public TipoAutorizacao doUpdate() {

        dao.merge(entitySelected);

        return entitySelected;

    }

}

My Observer:

public class PersistenceEvent {

    @Inject

    private Messages msg;

    public void onAtualizar(@Observes(during=TransactionPhase.AFTER_SUCCESS) @Update final TipoAutorizacao tipoAutorizacao) {

        msg.info(new BundleKey("messages", "registro_atualizado_sucesso"));

    }

}

Any idea?

[lucaster]

Hi, Eduardo!

Does your observer method simply not get fired, or do you get an exception? Could you please post the stacktrace?

Try this:

• Make PersistenceEvent a @Stateful EJB
• Add @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) to the observer method

See this: http://www.seamframework.org/Documentation/WhyIsThereNoActiveTransactionInMySFSBTransactionalObserver

Also, there might be errors in your code:

dao.merge(entitySelected);

Should be:
entitySelected = dao.merge(entitySelected);

[filosofisto]

Hi Cavagnoli,

I have corrected dao.merge() and tried @Statefull with @TransactionAttribute(TransactionAttributeType.REQUIRED), REQUIRED_NEW is not an option cause we can have a chain of calls within the same transaction.

Simply observer does not get fire, very strange.

Any more ideas?

[lucaster]

The event does not get fired at all? Maybe the update() method is never called...

Try add a log statement before evtUpdate.fire(t);

[filosofisto]

Hi Cavgnoli, in reality evtUpdate.fire(t) is executed, because I have debugged code and confirm the event fire.

But, event don't is realized by observe method!!!

Strange