From b77454ed16d2d01c2eea340dc0524aba1c962a4d Mon Sep 17 00:00:00 2001
From: Ivan Topolnjak <ivantopo@gmail.com>
Date: Mon, 24 Mar 2014 23:56:07 -0300
Subject: ensure that kamon.trace.ask-pattern-tracing setting is honored,
 closes #4

---
 .../akka/instrumentation/AskPatternTracing.scala   | 49 ++++++++++++----------
 1 file changed, 27 insertions(+), 22 deletions(-)

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

diff --git a/kamon-core/src/main/scala/akka/instrumentation/AskPatternTracing.scala b/kamon-core/src/main/scala/akka/instrumentation/AskPatternTracing.scala
index b5b23e61..08508930 100644
--- a/kamon-core/src/main/scala/akka/instrumentation/AskPatternTracing.scala
+++ b/kamon-core/src/main/scala/akka/instrumentation/AskPatternTracing.scala
@@ -1,18 +1,19 @@
-/* ===================================================
+/*
+ * =========================================================================================
  * 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
+ * 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
+ *  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.
- * ========================================================== */
+ * 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.{ AfterReturning, Pointcut, Aspect }
@@ -20,6 +21,8 @@ import akka.event.Logging.Warning
 import scala.compat.Platform.EOL
 import akka.actor.ActorRefProvider
 import akka.pattern.{ AskTimeoutException, PromiseActorRef }
+import kamon.trace.Trace
+import kamon.Kamon
 
 @Aspect
 class AskPatternTracing {
@@ -27,23 +30,25 @@ class AskPatternTracing {
   class StackTraceCaptureException extends Throwable
 
   @Pointcut(value = "execution(* akka.pattern.PromiseActorRef$.apply(..)) && args(provider, *)", argNames = "provider")
-  def promiseActorRefApply(provider: ActorRefProvider): Unit = {
-    provider.settings.config.getBoolean("kamon.trace.ask-pattern-tracing")
-  }
+  def promiseActorRefApply(provider: ActorRefProvider): Unit = {}
 
   @AfterReturning(pointcut = "promiseActorRefApply(provider)", returning = "promiseActor")
   def hookAskTimeoutWarning(provider: ActorRefProvider, promiseActor: PromiseActorRef): Unit = {
-    val future = promiseActor.result.future
     val system = promiseActor.provider.guardian.underlying.system
-    implicit val ec = system.dispatcher
-    val stack = new StackTraceCaptureException
+    val traceExtension = Kamon(Trace)(system)
+
+    if (traceExtension.enableAskPatternTracing) {
+      val future = promiseActor.result.future
+      implicit val ec = system.dispatcher
+      val stack = new StackTraceCaptureException
 
-    future onFailure {
-      case timeout: AskTimeoutException ⇒
-        val stackString = stack.getStackTrace.drop(3).mkString("", EOL, EOL)
+      future onFailure {
+        case timeout: AskTimeoutException ⇒
+          val stackString = stack.getStackTrace.drop(3).mkString("", EOL, EOL)
 
-        system.eventStream.publish(Warning("AskPatternTracing", classOf[AskPatternTracing],
-          "Timeout triggered for ask pattern registered at: " + stackString))
+          system.eventStream.publish(Warning("AskPatternTracing", classOf[AskPatternTracing],
+            "Timeout triggered for ask pattern registered at: " + stackString))
+      }
     }
   }
 }
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