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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.kamon.instrumentation
import akka.actor._
import akka.dispatch.{ Envelope, MessageDispatcher }
import akka.routing.RoutedActorCell
import kamon.Kamon
import kamon.akka.{ RouterMetrics, ActorMetrics }
import kamon.metric.Entity
import kamon.trace._
import org.aspectj.lang.ProceedingJoinPoint
import org.aspectj.lang.annotation._
@Aspect
class ActorCellInstrumentation {
@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 = {
Kamon.metrics.register(ActorMetrics, ref.path.elements.mkString("/")).map { registration ⇒
val cellMetrics = cell.asInstanceOf[ActorCellMetrics]
cellMetrics.entity = registration.entity
cellMetrics.recorder = Some(registration.recorder)
}
}
@Pointcut("execution(* akka.actor.ActorCell.invoke(*)) && this(cell) && args(envelope)")
def invokingActorBehaviourAtActorCell(cell: ActorCell, envelope: Envelope) = {}
@Around("invokingActorBehaviourAtActorCell(cell, envelope)")
def aroundBehaviourInvoke(pjp: ProceedingJoinPoint, cell: ActorCell, envelope: Envelope): Any = {
val cellMetrics = cell.asInstanceOf[ActorCellMetrics]
val timestampBeforeProcessing = System.nanoTime()
val contextAndTimestamp = envelope.asInstanceOf[TimestampedTraceContextAware]
try {
TraceContext.withContext(contextAndTimestamp.traceContext) {
pjp.proceed()
}
} finally {
cellMetrics.recorder.map { am ⇒
val processingTime = System.nanoTime() - timestampBeforeProcessing
val timeInMailbox = timestampBeforeProcessing - contextAndTimestamp.captureNanoTime
am.processingTime.record(processingTime)
am.timeInMailbox.record(timeInMailbox)
am.mailboxSize.decrement()
// In case that this actor is behind a router, record the metrics for the router.
envelope.asInstanceOf[RouterAwareEnvelope].routerMetricsRecorder.map { rm ⇒
rm.processingTime.record(processingTime)
rm.timeInMailbox.record(timeInMailbox)
}
}
}
}
@Pointcut("execution(* akka.actor.ActorCell.sendMessage(*)) && this(cell) && args(envelope)")
def sendMessageInActorCell(cell: ActorCell, envelope: Envelope): Unit = {}
@After("sendMessageInActorCell(cell, envelope)")
def afterSendMessageInActorCell(cell: ActorCell, envelope: Envelope): Unit = {
val cellMetrics = cell.asInstanceOf[ActorCellMetrics]
cellMetrics.recorder.map(_.mailboxSize.increment())
}
@Pointcut("execution(* akka.actor.ActorCell.stop()) && this(cell)")
def actorStop(cell: ActorCell): Unit = {}
@After("actorStop(cell)")
def afterStop(cell: ActorCell): Unit = {
val cellMetrics = cell.asInstanceOf[ActorCellMetrics]
cellMetrics.recorder.map { _ ⇒
Kamon.metrics.unregister(cellMetrics.entity)
}
// The Stop can't be captured from the RoutedActorCell so we need to put this piece of cleanup here.
if (cell.isInstanceOf[RoutedActorCell]) {
val routedCellMetrics = cell.asInstanceOf[RoutedActorCellMetrics]
routedCellMetrics.routerRecorder.map { _ ⇒
Kamon.metrics.unregister(routedCellMetrics.routerEntity)
}
}
}
@Pointcut("execution(* akka.actor.ActorCell.handleInvokeFailure(..)) && this(cell)")
def actorInvokeFailure(cell: ActorCell): Unit = {}
@Before("actorInvokeFailure(cell)")
def beforeInvokeFailure(cell: ActorCell): Unit = {
val cellWithMetrics = cell.asInstanceOf[ActorCellMetrics]
cellWithMetrics.recorder.map(_.errors.increment())
// In case that this actor is behind a router, count the errors for the router as well.
val envelope = cell.currentMessage.asInstanceOf[RouterAwareEnvelope]
envelope.routerMetricsRecorder.map(_.errors.increment())
}
}
@Aspect
class RoutedActorCellInstrumentation {
@Pointcut("execution(akka.routing.RoutedActorCell.new(..)) && this(cell) && args(system, ref, props, dispatcher, routeeProps, supervisor)")
def routedActorCellCreation(cell: RoutedActorCell, system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, routeeProps: Props, supervisor: ActorRef): Unit = {}
@After("routedActorCellCreation(cell, system, ref, props, dispatcher, routeeProps, supervisor)")
def afterRoutedActorCellCreation(cell: RoutedActorCell, system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, routeeProps: Props, supervisor: ActorRef): Unit = {
Kamon.metrics.register(RouterMetrics, ref.path.elements.mkString("/")).map { registration ⇒
val cellMetrics = cell.asInstanceOf[RoutedActorCellMetrics]
cellMetrics.routerEntity = registration.entity
cellMetrics.routerRecorder = Some(registration.recorder)
}
}
@Pointcut("execution(* akka.routing.RoutedActorCell.sendMessage(*)) && this(cell) && args(envelope)")
def sendMessageInRouterActorCell(cell: RoutedActorCell, envelope: Envelope) = {}
@Around("sendMessageInRouterActorCell(cell, envelope)")
def aroundSendMessageInRouterActorCell(pjp: ProceedingJoinPoint, cell: RoutedActorCell, envelope: Envelope): Any = {
val cellMetrics = cell.asInstanceOf[RoutedActorCellMetrics]
val timestampBeforeProcessing = System.nanoTime()
val contextAndTimestamp = envelope.asInstanceOf[TimestampedTraceContextAware]
try {
TraceContext.withContext(contextAndTimestamp.traceContext) {
// The router metrics recorder will only be picked up if the message is sent from a tracked router.
RouterAwareEnvelope.dynamicRouterMetricsRecorder.withValue(cellMetrics.routerRecorder) {
pjp.proceed()
}
}
} finally {
cellMetrics.routerRecorder map { routerRecorder ⇒
routerRecorder.routingTime.record(System.nanoTime() - timestampBeforeProcessing)
}
}
}
}
trait ActorCellMetrics {
var entity: Entity = _
var recorder: Option[ActorMetrics] = None
}
trait RoutedActorCellMetrics {
var routerEntity: Entity = _
var routerRecorder: Option[RouterMetrics] = None
}
trait RouterAwareEnvelope {
def routerMetricsRecorder: Option[RouterMetrics]
}
object RouterAwareEnvelope {
import scala.util.DynamicVariable
private[kamon] val dynamicRouterMetricsRecorder = new DynamicVariable[Option[RouterMetrics]](None)
def default: RouterAwareEnvelope = new RouterAwareEnvelope {
val routerMetricsRecorder: Option[RouterMetrics] = dynamicRouterMetricsRecorder.value
}
}
@Aspect
class MetricsIntoActorCellsMixin {
@DeclareMixin("akka.actor.ActorCell")
def mixinActorCellMetricsToActorCell: ActorCellMetrics = new ActorCellMetrics {}
@DeclareMixin("akka.routing.RoutedActorCell")
def mixinActorCellMetricsToRoutedActorCell: RoutedActorCellMetrics = new RoutedActorCellMetrics {}
}
@Aspect
class TraceContextIntoEnvelopeMixin {
@DeclareMixin("akka.dispatch.Envelope")
def mixinTraceContextAwareToEnvelope: TimestampedTraceContextAware = TimestampedTraceContextAware.default
@DeclareMixin("akka.dispatch.Envelope")
def mixinRouterAwareToEnvelope: RouterAwareEnvelope = RouterAwareEnvelope.default
@Pointcut("execution(akka.dispatch.Envelope.new(..)) && this(ctx)")
def envelopeCreation(ctx: TimestampedTraceContextAware): Unit = {}
@After("envelopeCreation(ctx)")
def afterEnvelopeCreation(ctx: TimestampedTraceContextAware with RouterAwareEnvelope): Unit = {
// Necessary to force the initialization of ContextAware at the moment of creation.
ctx.traceContext
ctx.routerMetricsRecorder
}
}
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