1 files changed, 130 insertions, 0 deletions
diff --git a/kamon-core/src/main/scala/kamon/instrumentation/akka/ActorCellInstrumentation.scala b/kamon-core/src/main/scala/kamon/instrumentation/akka/ActorCellInstrumentation.scala
new file mode 100644
index 00000000..5fce4555
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/instrumentation/akka/ActorCellInstrumentation.scala
@@ -0,0 +1,130 @@
+/*
+ * =========================================================================================
+ * 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 akka.actor._
+import akka.dispatch.{ Envelope, MessageDispatcher }
+import kamon.Kamon
+import kamon.metric.ActorMetrics.ActorMetricsRecorder
+import kamon.metric.{ ActorMetrics, Metrics }
+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 = {
+
+    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)
+          am.mailboxSize.decrement()
+      }
+    }
+  }
+
+  @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 ⇒ am.mailboxSize.increment())
+  }
+
+  @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 ⇒
+      cellWithMetrics.mailboxSizeCollectorCancellable.cancel()
+      Kamon(Metrics)(cell.system).unregister(cellWithMetrics.metricIdentity)
+    }
+  }
+
+  @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.actorMetricsRecorder.map {
+      am ⇒ am.errors.increment()
+    }
+  }
+}
+
+trait ActorCellMetrics {
+  var metricIdentity: ActorMetrics = _
+  var actorMetricsRecorder: Option[ActorMetricsRecorder] = _
+  var mailboxSizeCollectorCancellable: Cancellable = _
+}
+
+@Aspect
+class ActorCellMetricsIntoActorCellMixin {
+
+  @DeclareMixin("akka.actor.ActorCell")
+  def mixinActorCellMetricsToActorCell: ActorCellMetrics = new ActorCellMetrics {}
+}
+
+@Aspect
+class TraceContextIntoEnvelopeMixin {
+
+  @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
+  }
+}
+\ No newline at end of file