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/*
* =========================================================================================
* 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 org.aspectj.lang.annotation._
import akka.dispatch.{ExecutorServiceDelegate, Dispatcher, MessageDispatcher}
import kamon.metrics.{Metrics, DispatcherMetrics}
import kamon.metrics.DispatcherMetrics.DispatcherMetricRecorder
import kamon.Kamon
import akka.actor.{Cancellable, ActorSystemImpl}
import scala.concurrent.forkjoin.ForkJoinPool
import java.util.concurrent.ThreadPoolExecutor
import java.lang.reflect.Method
import akka.instrumentation.DispatcherMetricsCollector.DispatcherMetricsMeasurement
@Aspect
class DispatcherTracing {
private[this] var actorSystem: ActorSystemImpl = _
@Pointcut("execution(akka.actor.ActorSystemImpl.new(..)) && this(system)")
def onActorSystemStartup(system: ActorSystemImpl) = {}
@Before("onActorSystemStartup(system)")
def beforeActorSystemStartup(system: ActorSystemImpl): Unit = {
actorSystem = system
}
@Pointcut("call(* akka.dispatch.ExecutorServiceFactory.createExecutorService(..))")
def onCreateExecutorService(): Unit = {}
@Pointcut("cflow((execution(* akka.dispatch.MessageDispatcher.registerForExecution(..)) || execution(* akka.dispatch.MessageDispatcher.executeTask(..))) && this(dispatcher))")
def onCflowMessageDispatcher(dispatcher: Dispatcher): Unit = {}
@Pointcut("onCreateExecutorService() && onCflowMessageDispatcher(dispatcher)")
def onDispatcherStartup(dispatcher: Dispatcher): Unit = {}
@After("onDispatcherStartup(dispatcher)")
def afterDispatcherStartup(dispatcher: MessageDispatcher): Unit = {
val metricsExtension = Kamon(Metrics)(actorSystem)
val metricIdentity = DispatcherMetrics(dispatcher.id)
val dispatcherWithMetrics = dispatcher.asInstanceOf[DispatcherMessageMetrics]
dispatcherWithMetrics.metricIdentity = metricIdentity
dispatcherWithMetrics.dispatcherMetricsRecorder = metricsExtension.register(metricIdentity, DispatcherMetrics.Factory)
if (dispatcherWithMetrics.dispatcherMetricsRecorder.isDefined) {
dispatcherWithMetrics.dispatcherCollectorCancellable = metricsExtension.scheduleGaugeRecorder {
dispatcherWithMetrics.dispatcherMetricsRecorder.map {
dm ⇒
val DispatcherMetricsMeasurement(maximumPoolSize, runningThreadCount, queueTaskCount, poolSize) =
DispatcherMetricsCollector.collect(dispatcher)
dm.maximumPoolSize.record(maximumPoolSize)
dm.runningThreadCount.record(runningThreadCount)
dm.queueTaskCount.record(queueTaskCount)
dm.poolSize.record(poolSize)
}
}
}
}
@Pointcut("execution(* akka.dispatch.MessageDispatcher.shutdown(..)) && this(dispatcher)")
def onDispatcherShutdown(dispatcher: MessageDispatcher): Unit = {}
@After("onDispatcherShutdown(dispatcher)")
def afterDispatcherShutdown(dispatcher: MessageDispatcher): Unit = {
val dispatcherWithMetrics = dispatcher.asInstanceOf[DispatcherMessageMetrics]
dispatcherWithMetrics.dispatcherMetricsRecorder.map {
dispatcher =>
dispatcherWithMetrics.dispatcherCollectorCancellable.cancel()
Kamon(Metrics)(actorSystem).unregister(dispatcherWithMetrics.metricIdentity)
}
}
}
@Aspect
class DispatcherMetricsMixin {
@DeclareMixin("akka.dispatch.Dispatcher")
def mixinDispatcherMetricsToMessageDispatcher: DispatcherMessageMetrics = new DispatcherMessageMetrics {}
}
trait DispatcherMessageMetrics {
var metricIdentity: DispatcherMetrics = _
var dispatcherMetricsRecorder: Option[DispatcherMetricRecorder] = _
var dispatcherCollectorCancellable: Cancellable = _
}
object DispatcherMetricsCollector {
case class DispatcherMetricsMeasurement(maximumPoolSize: Long, runningThreadCount: Long, queueTaskCount: Long, poolSize: Long)
private def collectForkJoinMetrics(pool: ForkJoinPool): DispatcherMetricsMeasurement = {
DispatcherMetricsMeasurement(pool.getParallelism, pool.getActiveThreadCount,
(pool.getQueuedTaskCount + pool.getQueuedSubmissionCount), pool.getPoolSize)
}
private def collectExecutorMetrics(pool: ThreadPoolExecutor): DispatcherMetricsMeasurement = {
DispatcherMetricsMeasurement(pool.getMaximumPoolSize, pool.getActiveCount, pool.getQueue.size(), pool.getPoolSize)
}
private val executorServiceMethod: Method = {
// executorService is protected
val method = classOf[Dispatcher].getDeclaredMethod("executorService")
method.setAccessible(true)
method
}
def collect(dispatcher: MessageDispatcher): DispatcherMetricsMeasurement = {
dispatcher match {
case x: Dispatcher ⇒ {
val executor = executorServiceMethod.invoke(x) match {
case delegate: ExecutorServiceDelegate ⇒ delegate.executor
case other ⇒ other
}
executor match {
case fjp: ForkJoinPool ⇒ collectForkJoinMetrics(fjp)
case tpe: ThreadPoolExecutor ⇒ collectExecutorMetrics(tpe)
case anything ⇒ DispatcherMetricsMeasurement(0L, 0L, 0L, 0L)
}
}
case _ ⇒ new DispatcherMetricsMeasurement(0L, 0L, 0L, 0L)
}
}
}
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