aspectj pointcut with annotation parameters

aspectj
user373201 picture user373201 · Feb 7, 2011 · Viewed 33.1k times · Source

I am using aspectj to intercept methods that are annotated with @Profile(description="something")

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Profile {
    public String description() default "";
}

@Around("com.merc.aop.ctw.aspect.PointcutDefinitions.logAnnotatedMethods(profile)")
public Object profile(ProceedingJoinPoint pjp, Profile profile) throws Throwable {
    ....
}

@Pointcut("@annotation(com.merc.annotations.Profile)")
protected void logAnnotatedMethods(Profile profile) {
}

But I get the following error msg while compileing using AJC

formal unbound in pointcut

Answer

Sean Patrick Floyd picture Sean Patrick Floyd · Feb 7, 2011 
@Pointcut("@annotation(com.merc.annotations.Profile)")
protected void logAnnotatedMethods(Profile profile) {
}

This is not correct, @annotation() wants a parameter name, not a parameter type.

If your class is compiled with debug code, the pointcut parameter must have the same name as the method parameter, if not, you need to either rely on the parameter types being unique or explicitly write out your parameter names using the argNames parameter:

@Pointcut(value="@annotation(profile)",argNames="profile")
protected void logAnnotatedMethods(Profile arg) {    }

Reference:

Related questions

@AspectJ pointcut for all methods of a class with specific annotation

I want to monitor all public methods of all Classes with specified annotation (say @Monitor) (note: Annotation is at class level). What could be a possible pointcut for this? Note: I am using @AspectJ style Spring AOP.

Read More
Spring AOP: What's the difference between JoinPoint and PointCut?

I'm learning Aspect Oriented Programming concepts and Spring AOP. I'm failing to understand the difference between a Pointcut and a Joinpoint - both of them seem to be the same for me. A Pointcut is where you apply your advice …

Read More
Spring AOP vs AspectJ

I am under the impression that Spring AOP is best used for application specific tasks such as security, logging, transactions, etc. as it uses custom Java5 annotations as a framework. However, AspectJ seems to be more friendly design-patterns wise. Can …

Read More