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

[Marius Bogoevici]

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 <mailto: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 <mailto: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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>    

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