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

[Lincoln Baxter, III]

Ahh ok - We're talking about lookups on invocation, not injection -- got it.
That could definitely be useful.

On Tue, Apr 20, 2010 at 12:55 PM, Pete Muir <pmuir at redhat.com> wrote:

> No, that is not the same as a fully stateless scope where the object is
> looked up everytime it is invoked, not everytime it is injected.
>
> On 20 Apr 2010, at 17:07, Lincoln Baxter, III wrote:
>
> > Ok yeah, thats what I thought.
> >
> > @Produces @New -- would that not work?
> >
> > On Tue, Apr 20, 2010 at 12:06 PM, Marius Bogoevici <
> marius.bogoevici at gmail.com> wrote:
> > On 10-04-20 11:31 AM, Lincoln Baxter, III wrote:
> >> Wait -- there's no "Prototype" or "always new" scope?
> > @Dependent or @New, from case to case.
> >
> >>
> >> --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
> >> >
> >>
> >>
> >> _______________________________________________
> >> seam-dev mailing list
> >> seam-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/seam-dev
> >>
> >>
> >>
> >> --
> >> Lincoln Baxter, III
> >> http://ocpsoft.com
> >> http://scrumshark.com
> >> "Keep it Simple"
> >>
> >> _______________________________________________
> >> seam-dev mailing list
> >>
> >> seam-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/seam-dev
> >>
> >>
> >>
> >
> >
> >
> >
> > --
> > Lincoln Baxter, III
> > http://ocpsoft.com
> > http://scrumshark.com
> > "Keep it Simple"
> > _______________________________________________
> > seam-dev mailing list
> > seam-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/seam-dev
>
>


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