philhan philhan - 14 days ago 13
Java Question

Spring aspect call on custom annotation on interface method

I have this interface:

public interface FakeTemplate {

@CustomAnnotation
void foo() {

}

}


And this implementation of the interface:

@Component
public FakeImpl implements FakeTemplate {

@Override
public void foo() {
//Do Stuff
}

}


And this aspect:

@Aspect
@Component
public class CustomAspect {

@Before(value = "@annotation(com.fake.CustomAnnotation)")
public void doStuffBefore(JoinPoint joinPoint} {

}

}


I'm using spring with AspectJ enabled using:
@EnableAspectJAutoProxy(proxyTargetClass = true)


My issue is that the aspect
doStuffBefore
method is not being called before the execution of FakeImpl's
foo()
method. It Does work when I put the
@CustomAnnotation
on
FakeImpl
instead of
FakeTemplate
, but I'd much prefer to put the annotation on
FakeTemplate
as it's in a separate API package and I've kind of delegated it as the place where I put all my annotations.

I'd also like to ensure that the
CustomAnnotation
is called on every class that implements
FakeTemplate
without remembering to put the annotation on all the implementation classes themselves.

Is there any way to get the advice to be called if the annotation is only on the interface class?

Answer

Annotation inheritance doesn't work for methods in java. But you can use other pointcut expression, something like execution(public * FakeTemplate+.foo(..))