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/*
* =========================================================================================
* 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
*
* 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.{ AfterReturning, Pointcut, Aspect }
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 {
class StackTraceCaptureException extends Throwable
@Pointcut(value = "execution(* akka.pattern.PromiseActorRef$.apply(..)) && args(provider, *)", argNames = "provider")
def promiseActorRefApply(provider: ActorRefProvider): Unit = {}
@AfterReturning(pointcut = "promiseActorRefApply(provider)", returning = "promiseActor")
def hookAskTimeoutWarning(provider: ActorRefProvider, promiseActor: PromiseActorRef): Unit = {
val system = promiseActor.provider.guardian.underlying.system
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)
system.eventStream.publish(Warning("AskPatternTracing", classOf[AskPatternTracing],
"Timeout triggered for ask pattern registered at: " + stackString))
}
}
}
}
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