[seam-dev] @Unwrap implementation in weld-extensions

[Lincoln Baxter, III]

Wait -- there's no "Prototype" or "always new" scope?

--Lincoln

On Tue, Apr 20, 2010 at 6:45 AM, Stuart Douglas <stuart at baileyroberts.com.au
> wrote:

> I don't think I will be able to implement the injection of InjectionPoint
> into the producer method, but other than that it should be possible to
> implement.
>
> Stuart
>
>
> On 20/04/2010, at 8:15 PM, Pete Muir wrote:
>
> > Yes, I agree. I had raised this issue during spec development - that
> there was no truly stateless scope in CDI, where the bean instance was
> created every time.
> >
> > I would like to hear from the 299 EG about this as well.
> >
> > On 20 Apr 2010, at 04:57, Stuart Douglas wrote:
> >
> >> I think that there is a real use case for something similar to the
> @Unwrap feature of seam 2.
> >>
> >> I think that it would be possible to implement something like this:
> >>
> >> @ConversationScoped
> >> public class ManagedPersistenceContext
> >> {
> >>
> >> EntityManager entityManager;
> >>
> >> @Unwrap
> >> @SomeQualifier
> >> public EntityManager produce(InjectionPoint injectionPoint)
> >> {
> >>   entityManager.joinTransaction();
> >>   return entityManager;
> >> }
> >> }
> >>
> >> public class MyClass
> >> {
> >> @Inject @SomeQualifier EntityManager entityManager;
> >> }
> >>
> >> the way I envisage this working is that a proxy gets injected into
> MyClass, and this proxy calls ManagedPersistenceContext.produce to resolve
> the correct EntityManager to pass the call to every time a method is invoked
> on the proxy.
> >>
> >> I am pretty sure I can implement this in weld-extensions using JDK
> proxies, does this sound like a good idea?
> >>
> >> Stuart
> >> _______________________________________________
> >> seam-dev mailing list
> >> seam-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/seam-dev
> >
>
>
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>



-- 
Lincoln Baxter, III
http://ocpsoft.com
http://scrumshark.com
"Keep it Simple"
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