[weld-dev] How to avoid classes being picked as managed beans?

[Jason Porter]

You're right Dan :)

On Wed, Mar 9, 2011 at 13:30, Dan Allen <dan.j.allen at gmail.com> wrote:
> On Wed, Mar 9, 2011 at 11:30, Jason Porter <lightguard.jp at gmail.com> wrote:
>>
>> On Wed, Mar 9, 2011 at 09:03, aalmiray <aalmiray at yahoo.com> wrote:
>> > Hello guys. I'm new to Weld and CDI, perhaps the subject of this message
>> > is a
>> > bit obvious to some of you but for the life of me couldn't find a
>> > portable
>> > solution to the following problem: Weld will pick up all classes of an
>> > application (found in a single jar that contains an empty beans.xml
>> > file),
>> > however I would like the container to cherry pick a set of classes based
>> > on
>> > some criteria (package name, class name convention, annotation, etc).
>> >
>> > I've seen that Weld has an extension (non-standard) that allows classes
>> > to
>> > be annotated with @Veto. It works fine but it poses to additional
>> > problems:
>> > - @Veto is Weld specific
>>
>> The annotation is specific to Weld (hopefully will make it into the
>> CDI 1.1 spec), but the way it works is not.
>
> Two corrections :) @Veto is part of Seam (Seam Solder), not Weld. Also, it
> is portable, as it's based on the portable extension facility in CDI.
> Since you can write your own extensions, the solutions to your question are
> boundless. i can give you some other starting points to consider.
> Instead of including beans.xml, which will automatically cause all candidate
> types to be picked up as beans, you can go the other route and leave out
> beans.xml, and register beans explicitly. Here's an example:
> public class ManualBeanRegistrationExtension implements Extension {
>     public void registerBeans(@Observes BeforeBeanDiscovery event,
> BeanManager bm) {
>
>  event.addAnnotatedType(bm.createAnnotatedType(BeanClassToRegister.class));
>     }
> }
> Another approach is to use Weld's scanning configuration. That is a
> non-portable solution, though, so you'd have weigh that. If I'm not
> mistaken, that feature is being discussed for CDI 1.1.
> http://docs.jboss.org/weld/reference/1.1.0.Final/en-US/html/configure.html#d0e5767
> -Dan
> --
> Dan Allen
> Principal Software Engineer, Red Hat | Author of Seam in Action
> Registered Linux User #231597
>
> http://www.google.com/profiles/dan.j.allen#about
> http://mojavelinux.com
> http://mojavelinux.com/seaminaction
>
>



-- 
Jason Porter
http://lightguard-jp.blogspot.com
http://twitter.com/lightguardjp

Software Engineer
Open Source Advocate
Author of Seam Catch - Next Generation Java Exception Handling

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