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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.pattern
import org.aspectj.lang.annotation.{ AfterReturning, Pointcut, Aspect }
import akka.event.Logging.Warning
import scala.compat.Platform.EOL
import akka.actor.ActorRefProvider
@Aspect
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")
}
@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
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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