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Modify parameter of method by value in annotation aspectJ


Modify parameter of method by value in annotation aspectJ

By : whateveranyhow
Date : November 28 2020, 03:01 PM
this one helps. I started learing aspectJ and I wondering is it possible to create aspect in file .aj instead of annotation in .java, this is my example: , Yes, that is possible.
code :
public aspect MyAspect {

    public MyAspect() {
      System.out.println("Aspect instance created");
    }

   pointcut myPointcut(ParameterType parameter)
               : ("execution(* *(..)) && @annotation(Te));

    Object around(ParameterType parameter) : myPointcut(parameter) {
       // Business logic here
       // 'thisJoinPointStaticPart' will give you access to join point
       // 'this' will give you access to advice instance itself
       // `return proceed();` will allow you to execute advised join point
    }
}


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How to get the value of an annotation parameter for usage in AspectJ?

How to get the value of an annotation parameter for usage in AspectJ?


By : David Song
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Consider this method: , Try to use:
code :
pointcut check(Access access) : 
execution(@Access * *(..)) && @annotation(access);
@AspectJ Class level Annotation Advice with Annotation as method argument

@AspectJ Class level Annotation Advice with Annotation as method argument


By : Mickel.Malik
Date : March 29 2020, 07:55 AM
like below fixes the issue The solution is actually quite simple. I am writing my code in native AspectJ style, I prefer it for clarity. You will be easily able to adjust it to @AspectJ annotation style:
code :
public aspect LogTimeAspect {
    pointcut publicMethod() : execution(public * *(..));

    before(LogExecutionTime logAnn) : publicMethod() && @annotation(logAnn) {
        System.out.println(thisJoinPointStaticPart + " -> " + logAnn.level());
    }

    before(LogExecutionTime logAnn) : publicMethod() && @within(logAnn) {
        System.out.println(thisJoinPointStaticPart + " -> " + logAnn.level());
    }
}
execution(void Operator.operate()) -> Method_Level_Invocation
execution(void Operator.operate()) -> Class_Level_Invocation
execution(void Operator.operate1()) -> Class_Level_Invocation
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class LogTimeAspect {
    @Pointcut("execution(public * *(..))")
    public void publicMethod() {}

    @Around("publicMethod() && @annotation(logAnn)")
    public Object LogExecutionTimeByMethod(ProceedingJoinPoint joinPoint, LogExecutionTime logAnn) throws Throwable {
        System.out.println(joinPoint + " -> " + logAnn.level());
        return joinPoint.proceed();
    }

    @Around("publicMethod() && @within(logAnn)")
    public Object LogExecutionTimeByClass(ProceedingJoinPoint joinPoint, LogExecutionTime logAnn) throws Throwable {
        System.out.println(joinPoint + " -> " + logAnn.level());
        return joinPoint.proceed();
    }
}
Modify a method annotation parameter at runtime

Modify a method annotation parameter at runtime


By : Sean F.
Date : November 17 2020, 11:58 AM
This might help you I wrote a class AnnotationUtil to resolve the seris requirements.
It can add/remove/change annotation value on class/field/method instance.
Modify a method parameter value using aspectj in Scala

Modify a method parameter value using aspectj in Scala


By : user3192037
Date : March 29 2020, 07:55 AM
it should still fix some issue before() and after() advice cannot modify what is going to happen at a joinpoint, they can merely observe it. around() advice will do what you need. Something like:
code :
void around(long l,boolean b): execution(* delete(..)) && args(l,b) {
  if ((l%2)==0) {
    proceed(l,b);
  } else {
    proceed(l,!b);
  }
}
Get Annotation Parameter with AspectJ

Get Annotation Parameter with AspectJ


By : James Chandler
Date : March 29 2020, 07:55 AM
To fix the issue you can do The solution for this is making sure the advice method's parameter name match the parameter name in AspectJ expression. In my case, the advice method should look like this:
code :
@Aspect
public class MyAspect {
    @Around("@annotation(myAnnotation)")
    public Object handle(ProceedingJoinPoint joinPoint, MyAnnotation myAnnotation) {
        System.out.println(myAnnotation.exceptionList); // should print out TimeOutException
    }
}
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