Hi, Ivan
I guess you must be very familiar with both aspectj and scala, could you
help me on below question?
I'm trying to do some experimental point cut on scala.concurrent.Future,
something like:
@Aspect
class FutureAspect {
@Around(value = "execution (* scala.concurrent.Future$.apply(..)) &&
args(body)", argNames = "jp,body")
def futureCP(jp: ProceedingJoinPoint, body: AnyRef) {
println("something")
val args = jp.getArgs
args(0) = wrap(body)
jp.proceed(args)
}
def wrap[T](f: =>T) : T ={
try{
println("start body")
f
}finally{
println("end body")
}
}
}
and my test-aop.xml:
<aspectj>
<aspects>
<aspect name="com.leon.mypackage.FutureAspect"/>
</aspects>
<weaver options="-XnoInline">
<include within="scala.concurrent.Future$"/>
</weaver>
</aspectj>
My test class:
class FutureAspectTest extends FlatSpecLike with Matchers {
"FutureAspect" should "work" in {
val f = {println("Hello world")}
Future(f)
}
}
My VM setting in IDEA:
-javaagent:C:\Users\lma\.ivy2\cache\org.aspectj\aspectjweaver\jars\aspectjweaver-1.7.4.jar
-Dorg.aspectj.weaver.loadtime.configuration=META-INF/test-aop.xml
However, It seems not work.
Could you give me some suggestions? Anything missed?
Btw, How to handle the generics in aspectj with scala ? like the input
parameter for Future(body: =>T), should I use AnyRef instead?
Thanks
Leon
在 2014年6月4日星期三UTC-7下午4时59分13秒，Ivan Topolnjak写道：
>
> Leon,
>
> Yes, we are using aspectj to instrument the Scala/Akka/Spray/Play! code
> and we choose to go with load-time weaving.. before elaborating a bit more
> on how to use the TraceLocal storage, from your code sample, I might be
> oversimplifying your requirements, but why don't you just pass your
> `MyObject` to `handleAppRequest`?, it seems like you are using a actor per
> request and I don't see any reason why a simpler approach couldn't work
> there.
>
> If you still want to use the TraceLocal storage I highly encourage you to
> raise this concern in the Kamon mailing list [1] and discuss it there, that
> way we also leave a record that might be useful to other Kamon users. Hope
> to hear back from you soon, best regards!
>
> [1] https://groups.google.com/forum/#!forum/kamon-user
>
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