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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 kamon.metric
import org.scalatest.{ WordSpecLike, Matchers }
import akka.testkit.{ TestProbe, TestKitBase }
import akka.actor.{ ActorRef, Props, ActorSystem }
import com.typesafe.config.ConfigFactory
import scala.concurrent.duration._
import kamon.Kamon
import kamon.metric.Subscriptions.TickMetricSnapshot
import kamon.metric.DispatcherMetrics.DispatcherMetricSnapshot
class DispatcherMetricsSpec extends TestKitBase with WordSpecLike with Matchers {
implicit lazy val system: ActorSystem = ActorSystem("dispatcher-metrics-spec", ConfigFactory.parseString(
"""
|kamon.metrics {
| filters = [
| {
| dispatcher {
| includes = ["*"]
| excludes = ["dispatcher-explicitly-excluded"]
| }
| }
| ]
|}
|
|dispatcher-explicitly-excluded {
| type = "Dispatcher"
| executor = "fork-join-executor"
|}
|
|tracked-dispatcher {
| type = "Dispatcher"
| executor = "thread-pool-executor"
|}
|
""".stripMargin))
"the Kamon dispatcher metrics" should {
"respect the configured include and exclude filters" in {
system.actorOf(Props[ActorMetricsTestActor].withDispatcher("tracked-dispatcher"), "actor-with-tracked-dispatcher")
system.actorOf(Props[ActorMetricsTestActor].withDispatcher("dispatcher-explicitly-excluded"), "actor-with-excluded-dispatcher")
Kamon(Metrics).subscribe(DispatcherMetrics, "*", testActor, permanently = true)
expectMsgType[TickMetricSnapshot]
within(2 seconds) {
val tickSnapshot = expectMsgType[TickMetricSnapshot]
tickSnapshot.metrics.keys should contain(DispatcherMetrics("tracked-dispatcher"))
tickSnapshot.metrics.keys should not contain (DispatcherMetrics("dispatcher-explicitly-excluded"))
}
}
"record maximumPoolSize, runningThreadCount, queueTaskCount, poolSize metrics" in new DelayableActorFixture {
val (delayable, metricsListener) = delayableActor("worker-actor", "tracked-dispatcher")
for (_ ← 1 to 100) {
//delayable ! Discard
}
val dispatcherMetrics = expectDispatcherMetrics("tracked-dispatcher", metricsListener, 3 seconds)
dispatcherMetrics.maximumPoolSize.max should be <= 64L //fail in travis
dispatcherMetrics.poolSize.max should be <= 22L //fail in travis
dispatcherMetrics.queueTaskCount.max should be(0L)
dispatcherMetrics.runningThreadCount.max should be(0L)
}
}
def expectDispatcherMetrics(dispatcherId: String, listener: TestProbe, waitTime: FiniteDuration): DispatcherMetricSnapshot = {
val tickSnapshot = within(waitTime) {
listener.expectMsgType[TickMetricSnapshot]
}
val dispatcherMetricsOption = tickSnapshot.metrics.get(DispatcherMetrics(dispatcherId))
dispatcherMetricsOption should not be empty
dispatcherMetricsOption.get.asInstanceOf[DispatcherMetricSnapshot]
}
trait DelayableActorFixture {
def delayableActor(name: String, dispatcher: String): (ActorRef, TestProbe) = {
val actor = system.actorOf(Props[ActorMetricsTestActor].withDispatcher(dispatcher), name)
val metricsListener = TestProbe()
Kamon(Metrics).subscribe(DispatcherMetrics, "*", metricsListener.ref, permanently = true)
// Wait for one empty snapshot before proceeding to the test.
metricsListener.expectMsgType[TickMetricSnapshot]
(actor, metricsListener)
}
}
}
|
