I'm evaluating Hibernate and EJB3 to migrate my application from EJB2.1.
At first the logic solution seems to be EJB3 but i'm seing that Hibernate provides an object cache and a built in object container, so what is the advantages/disavantages of having or not a container associated to my application?

Thank you,
António.

EJB 3.0 is a specification.
One implementation of EJB 3.0 (the persistence part) is Hibernate EntityManager.
So use Hibernate as your EJB3 implementation

But what is the advantage of using an container like Jboss or using only the hibernate since it seems that hibernate allready has a built in container?

Thank's
António

EJB3 contains :
- a service container (ie session beans)
- a persistence provider (ie HEM)

EJB3 as a whole integrate nicely the persistence provider lifecycle and the service container