RE: [aspectj-users] Question about profiling

[Jim.Hugunin@xxxxxxxx]

Johann Uhrmann wrote:
> I am quite new to AspectJ and I would like to write a profiling aspect
> that hooks into all method calls of a package and its subpackages.
> 
> Before every call the current system time should be saved and after the
> call the method execution time should be determined.
> 
> My problem is that I do not know where to store the variable for the
> start time stamp. Storing it in the aspect does not work as it seems to
> be global and is therefore destroyed by calls within the method.
> 
> Storing it in java.lang.Object does not work either as the weaver does
> not have access to that class.
> 
> Is there a way to store a variable in an aspect in a way that it is
> unique to a method call (or at least to the object calling/being called)?

I believe this is best solved with around advice, as shown below:

Object around(): profilePoints() {
    long start = System.currentTimeMillis();
    Object ret = proceed();
    long end = System.currentTimeMillis();
    noteTime(thisJoinPoint.getSignature().getName(), end-start);
    return ret;
}

-Jim