Jozef Hartinger created DELTASPIKE-783:
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Summary: 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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