Well, we might miss some explanation for this lines
> @PersistenceContext(unitName="default")
> private EntityManager entityManager;
This only works in SE. In an EE container you will get a Container Managed EM,
which is not manageable by the user, but strictly bound to EJBs.
Even the sample of softwaremill will not work on every EE container
> @PersistenceUnit(name="pu")
> private EntityManagerFactory emf;
On a few servers the EE - injected EMF will only allow you to create managed
EMs.
The best approach is to either create an additional
EntityManagerFactoryProducer where you can even stuff in JPA properties in a
central place, and inject it via CDI:
> @Inject
> private EntityManagerFactory emf;
Or you can simply do:
> @ApplicationScoped // important!
> public class EntityManagerProducer {
> private EntityManagerFactory emf =
> Persistence.createEntityManagerFactory();
>
> @Produces @RequestScoped
> public EntityManager getEntityManager() {
> return new EntityManagerTxEnlistDecorator (emf.createEntityManager());
> }
>
> public void close(@Disposes EntityManager em) {
> em.close();
> }
> }
>
Please note that this is the classic way to get a non-JTA EM! If you like to
use UserTransactions, then check our JPA module. Guess Gerhard added a sample
for it.
LieGrue,
strub
----- Original Message -----
> From: Adrian Gonzalez <[email protected]>
> To: "[email protected]"
> <[email protected]>
> Cc:
> Sent: Friday, August 24, 2012 11:38 AM
> Subject: RequestScoped entityManager
>
> Hello,
>
> Does DS provides a requestScopes em ?
>
> I tried to to something like https://cwiki.apache.org/EXTCDI/jpa-usage.html,
> but
> I had an error (don't remember which one, I think it was because em
> wasn't associated with current tx)
>
> For the moment, I'm using softwaremill EntityManagerTxEnlistDecorator
> (https://github.com/softwaremill/softwaremill-common/tree/master/softwaremill-cdi/src/main/java/pl/softwaremill/common/cdi/persistence
> and doing something like (I'm doing it from memory so, there can be some
> errors) :
>
> public class EntityManagerProducer {
> @PersistenceUnit(name="pu")
> private EntityManagerFactory emf;
>
> @Produces @RequestScoped
> public EntityManager getEntityManager() {
> return new EntityManagerTxEnlistDecorator (emf.createEntityManager());
> }
>
> public void close(@Disposes EntityManager em) {
> em.close();
> }
> }
>
> Not sure if it deserves a special classe in DS (perhaps at least
> softwaremill EntityManagerTxEnlistDecorator ?)
>
> Thanks
>
