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package kamon.trace.instrumentation
import org.aspectj.lang.annotation._
import org.aspectj.lang.ProceedingJoinPoint
import akka.actor.{Props, ActorSystem, ActorRef}
import akka.dispatch.{Envelope, MessageDispatcher}
import com.codahale.metrics.Timer
import kamon.trace.{ContextAware, TraceContext, Trace}
@Aspect
class BehaviourInvokeTracing {
@Pointcut("execution(akka.actor.ActorCell.new(..)) && args(system, ref, props, dispatcher, parent)")
def actorCellCreation(system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, parent: ActorRef): Unit = {}
@Pointcut("(execution(* akka.actor.ActorCell.invoke(*)) || execution(* akka.routing.RoutedActorCell.sendMessage(*))) && args(envelope)")
def invokingActorBehaviourAtActorCell(envelope: Envelope) = {}
@Around("invokingActorBehaviourAtActorCell(envelope)")
def aroundBehaviourInvoke(pjp: ProceedingJoinPoint, envelope: Envelope): Unit = {
//safe cast
val ctxInMessage = envelope.asInstanceOf[ContextAware].traceContext
Trace.withValue(ctxInMessage) {
pjp.proceed()
}
}
}
@Aspect
class EnvelopeTraceContextMixin {
@DeclareMixin("akka.dispatch.Envelope")
def mixin: ContextAware = ContextAware.default
@Pointcut("execution(akka.dispatch.Envelope.new(..)) && this(ctx)")
def envelopeCreation(ctx: ContextAware): Unit = {}
@After("envelopeCreation(ctx)")
def afterEnvelopeCreation(ctx: ContextAware): Unit = {
// Necessary to force the initialization of ContextAware at the moment of creation.
ctx.traceContext
}
}
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