/* ===================================================
* Copyright © 2013 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ========================================================== */
package akka.instrumentation
import org.aspectj.lang.annotation._
import org.aspectj.lang.ProceedingJoinPoint
import akka.actor._
import akka.dispatch.{ Envelope, MessageDispatcher }
import kamon.trace.{ TraceContext, ContextAware, Trace }
import kamon.metrics.{ ActorMetrics, Metrics }
import kamon.Kamon
import kamon.metrics.ActorMetrics.ActorMetricRecorder
import kamon.trace.TraceContext
import kamon.metrics.ActorMetrics.ActorMetricRecorder
@Aspect("perthis(actorCellCreation(*, *, *, *, *))")
class BehaviourInvokeTracing {
var path: String = _
var actorMetrics: Option[ActorMetricRecorder] = None
@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 = {}
@After("actorCellCreation(system, ref, props, dispatcher, parent)")
def afterCreation(system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, parent: ActorRef): Unit = {
val metricsExtension = Kamon(Metrics)(system)
path = ref.path.elements.mkString("/")
actorMetrics = metricsExtension.register(path, ActorMetrics)
}
@Pointcut("(execution(* akka.actor.ActorCell.invoke(*)) || execution(* akka.routing.RoutedActorCell.sendMessage(*))) && this(cell) && args(envelope)")
def invokingActorBehaviourAtActorCell(cell: ActorCell, envelope: Envelope) = {}
@Around("invokingActorBehaviourAtActorCell(cell, envelope)")
def aroundBehaviourInvoke(pjp: ProceedingJoinPoint, cell: ActorCell, envelope: Envelope): Unit = {
val timestampBeforeProcessing = System.nanoTime()
val contextAndTimestamp = envelope.asInstanceOf[ContextAndTimestampAware]
Trace.withContext(contextAndTimestamp.traceContext) {
pjp.proceed()
}
actorMetrics.map { am ⇒
am.processingTime.record(System.nanoTime() - timestampBeforeProcessing)
am.timeInMailbox.record(timestampBeforeProcessing - contextAndTimestamp.timestamp)
am.mailboxSize.record(cell.numberOfMessages)
}
}
@Pointcut("execution(* akka.actor.ActorCell.stop()) && this(cell)")
def actorStop(cell: Cell): Unit = {}
@After("actorStop(cell)")
def afterStop(cell: Cell): Unit = {
actorMetrics.map(p ⇒ Kamon(Metrics)(cell.system).unregister(path, ActorMetrics))
}
}
@Aspect
class EnvelopeTraceContextMixin {
@DeclareMixin("akka.dispatch.Envelope")
def mixin: ContextAndTimestampAware = new ContextAndTimestampAware {
val traceContext: Option[TraceContext] = Trace.context()
val timestamp: Long = System.nanoTime()
}
@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
}
}
trait ContextAndTimestampAware extends ContextAware {
def timestamp: Long
}