Thanks for your reply. It makes more sense now.
But I still think a matrix would help ;o)
Antonio
2011/1/21 Paul Sandoz <Paul.Sandoz_at_oracle.com>
>
> On Jan 20, 2011, at 9:11 PM, Antonio Goncalves wrote:
>
> Ok. I get it. I think I'm going to write a blog with a matrix about what
> can be injected where. I get confused sometimes.
>
> So is it true to say that, *without CDI involved* :
>
>
> 1) I can't inject anything into a resource
>
> @Path("/items")
> public class ItemResource {
> }
>
>
>
> You can of course inject JAX-RS stuff in all three cases (scope constraints
> apply for @*Param)
>
>
> 2) a resource annotated with @ManagedBean can inject : Managed Beans (with
> @Resource), EJBs (with @EJB)
>
> @Path("/items")
> *_at_ManagedBean*
> public class ItemResource {
> @Resource MyBean myBean;
> @EJB MyEJB myEJB;
> }
>
>
> Yes, the same rules as that for injection on servlets should apply. Note
> that @ManagedBean does not change the life-cycle/scoping rules.
>
>
>
> 3) a resource annotated with @Stateless can inject : Managed Beans (with
> @Resource), EJBs (with @EJB), an entity manager (with @PersistenceContext),
> JMS factories/destination (with @Resource)
>
> @Path("/items")
> *_at_Stateless*
> public class ItemResource {
> @Resource MyBean myBean;
> @EJB MyEJB myEJB;
> @PersistenceContext EntityManager em;
> @Resource ConnectionFactory factory;
> }
>
>
>
> Yes, same for @Singleton. The EE injection rules on EJBs are not affected
> by the @Path annotation.
>
> Paul.
>
--
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Antonio Goncalves (antonio.goncalves_at_gmail.com)
Software architect
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