From 923b88e8adef2f66b43e551fa4a0a1bbae5af7ff Mon Sep 17 00:00:00 2001
From: Ivan Topolnak <ivantopo@gmail.com>
Date: Wed, 7 Aug 2013 19:06:33 -0300
Subject: upgrading to akka 2.2

---
 .../ActorRefTellInstrumentation.scala              | 89 ++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 kamon-core/src/main/scala/kamon/instrumentation/ActorRefTellInstrumentation.scala

(limited to 'kamon-core/src/main/scala/kamon/instrumentation/ActorRefTellInstrumentation.scala')

diff --git a/kamon-core/src/main/scala/kamon/instrumentation/ActorRefTellInstrumentation.scala b/kamon-core/src/main/scala/kamon/instrumentation/ActorRefTellInstrumentation.scala
new file mode 100644
index 00000000..82915ce9
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/instrumentation/ActorRefTellInstrumentation.scala
@@ -0,0 +1,89 @@
+package kamon.instrumentation
+
+import org.aspectj.lang.annotation._
+import org.aspectj.lang.ProceedingJoinPoint
+import akka.actor.{Props, ActorSystem, ActorRef}
+import kamon.{Kamon, TraceContext}
+import akka.dispatch.{MessageDispatcher, Envelope}
+import com.codahale.metrics.{Timer, ExponentiallyDecayingReservoir, Histogram}
+import kamon.metric.{MetricDirectory, Metrics}
+import com.codahale.metrics
+import kamon.instrumentation.TraceableMessage
+import scala.Some
+
+case class TraceableMessage(traceContext: Option[TraceContext], message: Any, timer: Timer.Context)
+
+
+@Aspect
+class ActorRefTellInstrumentation {
+  import ProceedingJoinPointPimp._
+
+  @Pointcut("execution(* akka.actor.ScalaActorRef+.$bang(..)) && target(actor) && args(message, sender)")
+  def sendingMessageToActorRef(actor: ActorRef, message: Any, sender: ActorRef) = {}
+
+  @Around("sendingMessageToActorRef(actor, message, sender)")
+  def around(pjp: ProceedingJoinPoint, actor: ActorRef, message: Any, sender: ActorRef): Unit  = {
+
+    val actorName = MetricDirectory.nameForActor(actor)
+    val t = Metrics.registry.timer(actorName + "LATENCY")
+    //println(s"About to proceed with: $actor $message $sender ${Kamon.context}")
+    pjp.proceedWithTarget(actor, TraceableMessage(Kamon.context, message, t.time()), sender)
+  }
+}
+
+
+@Aspect("perthis(actorCellCreation(..))")
+class ActorCellInvokeInstrumentation {
+
+  var processingTimeTimer: Timer = _
+  var shouldTrack = false
+
+  // AKKA 2.2 introduces the dispatcher parameter. Maybe we could provide a dual pointcut.
+
+  @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 registerMetricsInRegistry(system: ActorSystem, ref: ActorRef, props: Props, dispatcher: MessageDispatcher, parent: ActorRef): Unit = {
+    val actorName = MetricDirectory.nameForActor(ref)
+    val histogramName = MetricDirectory.nameForMailbox(system.name, actorName)
+
+    /** TODO: Find a better way to filter the things we don't want to measure. */
+    //if(system.name != "kamon" && actorName.startsWith("/user")) {
+      processingTimeTimer = Metrics.registry.timer(histogramName + "/PROCESSINGTIME")
+      shouldTrack = true
+    //}
+  }
+
+
+  @Pointcut("execution(* akka.actor.ActorCell.invoke(*)) && args(envelope)")
+  def invokingActorBehaviourAtActorCell(envelope: Envelope) = {}
+
+
+  @Around("invokingActorBehaviourAtActorCell(envelope)")
+  def around(pjp: ProceedingJoinPoint, envelope: Envelope): Unit = {
+    import ProceedingJoinPointPimp._
+    println("ENVELOPE --------------------->"+envelope)
+    envelope match {
+      case Envelope(TraceableMessage(ctx, msg, timer), sender) => {
+        timer.stop()
+
+        val originalEnvelope = envelope.copy(message = msg)
+
+        //println("PROCESSING TIME TIMER: "+processingTimeTimer)
+        val pt = processingTimeTimer.time()
+        ctx match {
+          case Some(c) => {
+            Kamon.set(c)
+            println(s"ENVELOPE ORIGINAL: [$c]---------------->"+originalEnvelope)
+            pjp.proceedWith(originalEnvelope)
+            Kamon.clear
+          }
+          case None => pjp.proceedWith(originalEnvelope)
+        }
+        pt.stop()
+      }
+      case _ => pjp.proceed
+    }
+  }
+}
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