AspectJ with Akka systems - scala

Question

Just for reference, this question continues with question named : Error when working with AspectJ and Scala
I am trying to use AspectJ with Scala, specifically working with Akka actor systems.
I have been producing a pointcut of this type :
#Around("\"execution (* akka.actor.ActorRef.!(..)) \" + \"&& args(message, sender)\", argNames = \"(message, sender)\")")
def printSample() {
println("receive message ")
}
However an error crops up saying :
Invalid pointcut '"execution (* akka.actor.ActorRef.!(..)) " + "&& args(message, sender)", argNames = "(message, sender)")': org.aspectj.weaver.
patterns.ParserException: identifier at position 0
[error] org.aspectj.bridge.AbortException: AspectJ failed

Answer 1

Your pointcut is probably a copy & paste error, you quoted it:
#Around("\"execution (* akka.actor.ActorRef.!(..)) \" + \"&& args(message, sender)\", argNames = \"(message, sender)\")")
If you fix that to read
#Around(
"execution (* akka.actor.ActorRef.!(..)) && args(message, sender)",
argNames = "(message, sender)"
)
then you have the two annotation parameters you probably intended to use. But the ActorRef.!(..) with the ! still looks strange, you probably mean *. If the argument names in the advice method are identical to the ones used in args(), you can also omit that part completely and avoid boilerplate:
#Around("execution(* akka.actor.ActorRef.*(..)) && args(message, sender)")
That should do it.
Bottom line: Your problem is about basic Java annotations and AspectJ usage, not about Scala or Akka or whatever you thought was the problem.