JavaEE6 DAO: Should it be @Stateless or @ApplicationScoped?

Question

I\'m currently creating an EJB3 Data Access Class to handle all database operations in my Java EE 6-application. Now, since Java EE 6 provides the new ApplicationScope

Answer 1

After some rethinking, it seems like DAO is actually not the right name for what i wanted to do. Maybe it really is a Facade, as Pascal said. I just found the Netbeans Petstore Example - a JavaEE6 sample application, see here - where they have an ItemFacade which is responsible for finding/createing/removing entities from the database. It's a Stateless Session Bean. Looks like this:

@Stateless
public class ItemFacade implements Serializable {
    @PersistenceContext(unitName = "catalogPU")
    private EntityManager em;

    public void create(Item item) { ... }
    public void edit(Item item) { ... }
    public void remove(Item item) { ... }
    public Item find(Object id) { ... }
    public List findAll() { ... }
    public List findRange(int maxResults, int firstResult) { ... }
    public int getItemCount() { ... }
}

So as a conclusion i don't call my DAO DAO anymore but instead just for example PersonEJB (i think "PersonFacade" could be misunderstood) and make it also @Stateless, as i think the Netbeans example can be considered as well-designed.