I'm afraid I've written a bunch of nonsense in this post.
Searching more on the web, I found out that it's simply not possible to expose as RESTFul webservices EJBs that are deployed as EJB Project, i.e, arent'part of a WAR project.
That sound reasonable, because EJB in EJB projects are not meant to be accessed via HTTP; indeed, if you try and expose them as JAX-WS webservices, RAD creates a Dynamic
web project as requests router.
So, I think that I'll try and follow a BusinessDelegate
pattern implementation, for example like this :
Hope this may help someone else looking for solving similar problems, other suggestions are wellcome (of course !)
By the way: I have again to understand how multithreading invocations are handled....