[jira] [Resolved] (DELTASPIKE-783) Use @WithAnnotations

["Gerhard Petracek (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DELTASPIKE-783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gerhard Petracek resolved DELTASPIKE-783.
-----------------------------------------
    Resolution: Later

we can keep this ticket for later.
once we have cdi 1.1 as minimal requirement, we can re-visit it.

> Use @WithAnnotations
> --------------------
>
>                 Key: DELTASPIKE-783
>                 URL: https://issues.apache.org/jira/browse/DELTASPIKE-783
>             Project: DeltaSpike
>          Issue Type: Improvement
>    Affects Versions: 1.1.0
>            Reporter: Jozef Hartinger
>
> Make use of CDI's @WithAnnotations feature.
> Each extension that does something like:
> {code:JAVA}
> <X> void processAnnotatedType(@Observes ProcessAnnotatedType<X> event) {
>     if (!event.getAnnotatedType().isAnnotationPresent(Foo.class)) {
>         return;
>     }
>     // ...
> {code}
> can be extended to:
> {code:JAVA}
> <X> void processAnnotatedType(@Observes @WithAnnotations(Foo.class) ProcessAnnotatedType<X> event) {
>     if (!event.getAnnotatedType().isAnnotationPresent(Foo.class)) {
>         return;
>     }
>     // ...
> {code}
> This can yield performance boost in CDI 1.1+ environment because:
> 1) the observer method will be only called for annotated types that have the annotation, not for all the types in the deployment
> 2) the container may not event need to load the annotated type and its class at all if there are no observers requesting the type and the type does not represent a bean.
> In addition, this works nice in CDI 1.0 environment where the class definition for the annotation is not be found and is ignored.



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