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package kamon.instrumentation
import org.aspectj.lang.annotation._
import kamon.{Tracer, TraceContext}
import org.aspectj.lang.ProceedingJoinPoint
import scala.Some
/**
* Marker interface, just to make sure we don't instrument all the Runnables in the classpath.
*/
trait TraceContextAwareRunnable extends Runnable {}
@Aspect("perthis(instrumentedRunnableCreation())")
class RunnableInstrumentation {
/**
* These are the Runnables that need to be instrumented and make the TraceContext available
* while their run method is executed.
*/
@DeclareMixin("scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable")
def onCompleteCallbacksRunnable: TraceContextAwareRunnable = null
/**
* Pointcuts
*/
@Pointcut("execution(kamon.instrumentation.TraceContextAwareRunnable+.new(..))")
def instrumentedRunnableCreation(): Unit = {}
@Pointcut("execution(* kamon.instrumentation.TraceContextAwareRunnable.run())")
def runnableExecution() = {}
/**
* Aspect members
*/
private val traceContext = Tracer.context
/**
* Advices
*/
import kamon.TraceContextSwap.withContext
@Before("instrumentedRunnableCreation()")
def beforeCreation = {
//println((new Throwable).getStackTraceString)
}
@Around("runnableExecution()")
def around(pjp: ProceedingJoinPoint) = {
import pjp._
withContext(traceContext, proceed())
}
}
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