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/* ===================================================
* Copyright © 2013-2014 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._
import kamon.metrics.{ ActorMetrics, Metrics }
import kamon.Kamon
import kamon.metrics.ActorMetrics.ActorMetricRecorder
import java.util.concurrent.atomic.AtomicInteger
@Aspect
class BehaviourInvokeTracing {
@Pointcut("execution(akka.actor.ActorCell.new(..)) && this(cell) && args(system, ref, props, dispatcher, parent)")
def actorCellCreation(cell: ActorCell, system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, parent: ActorRef): Unit = {}
@After("actorCellCreation(cell, system, ref, props, dispatcher, parent)")
def afterCreation(cell: ActorCell, system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, parent: ActorRef): Unit = {
val metricsExtension = Kamon(Metrics)(system)
val metricIdentity = ActorMetrics(ref.path.elements.mkString("/"))
val cellWithMetrics = cell.asInstanceOf[ActorCellMetrics]
cellWithMetrics.metricIdentity = metricIdentity
cellWithMetrics.actorMetricsRecorder = metricsExtension.register(metricIdentity, ActorMetrics.Factory)
}
@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): Any = {
val timestampBeforeProcessing = System.nanoTime()
val contextAndTimestamp = envelope.asInstanceOf[TraceContextAware]
val cellWithMetrics = cell.asInstanceOf[ActorCellMetrics]
try {
TraceRecorder.withTraceContext(contextAndTimestamp.traceContext) {
pjp.proceed()
}
} finally {
cellWithMetrics.actorMetricsRecorder.map {
am ⇒
am.processingTime.record(System.nanoTime() - timestampBeforeProcessing)
am.timeInMailbox.record(timestampBeforeProcessing - contextAndTimestamp.captureNanoTime)
val currentMailboxSize = cellWithMetrics.queueSize.decrementAndGet()
if (currentMailboxSize >= 0)
am.mailboxSize.record(currentMailboxSize)
}
}
}
@Pointcut("execution(* akka.actor.ActorCell.sendMessage(*)) && this(cell)")
def sendingMessageToActorCell(cell: ActorCell): Unit = {}
@After("sendingMessageToActorCell(cell)")
def afterSendMessageToActorCell(cell: ActorCell): Unit = {
val cellWithMetrics = cell.asInstanceOf[ActorCellMetrics]
cellWithMetrics.actorMetricsRecorder.map {
am ⇒
val currentMailboxSize = cellWithMetrics.queueSize.incrementAndGet()
if (currentMailboxSize >= 0)
am.mailboxSize.record(currentMailboxSize)
}
}
@Pointcut("execution(* akka.actor.ActorCell.stop()) && this(cell)")
def actorStop(cell: ActorCell): Unit = {}
@After("actorStop(cell)")
def afterStop(cell: ActorCell): Unit = {
val cellWithMetrics = cell.asInstanceOf[ActorCellMetrics]
cellWithMetrics.actorMetricsRecorder.map(p ⇒ Kamon(Metrics)(cell.system).unregister(cellWithMetrics.metricIdentity))
}
}
trait ActorCellMetrics {
var metricIdentity: ActorMetrics = _
var actorMetricsRecorder: Option[ActorMetricRecorder] = _
val queueSize = new AtomicInteger
}
@Aspect
class ActorCellMetricsMixin {
@DeclareMixin("akka.actor.ActorCell")
def mixinActorCellMetricsToActorCell: ActorCellMetrics = new ActorCellMetrics {}
}
@Aspect
class EnvelopeTraceContextMixin {
@DeclareMixin("akka.dispatch.Envelope")
def mixinTraceContextAwareToEnvelope: TraceContextAware = TraceContextAware.default
@Pointcut("execution(akka.dispatch.Envelope.new(..)) && this(ctx)")
def envelopeCreation(ctx: TraceContextAware): Unit = {}
@After("envelopeCreation(ctx)")
def afterEnvelopeCreation(ctx: TraceContextAware): Unit = {
// Necessary to force the initialization of ContextAware at the moment of creation.
ctx.traceContext
}
}
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