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Diffstat (limited to 'kamon-akka/src/test/scala/kamon/instrumentation/akka/AskPatternInstrumentationSpec.scala')
-rw-r--r-- | kamon-akka/src/test/scala/kamon/instrumentation/akka/AskPatternInstrumentationSpec.scala | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/kamon-akka/src/test/scala/kamon/instrumentation/akka/AskPatternInstrumentationSpec.scala b/kamon-akka/src/test/scala/kamon/instrumentation/akka/AskPatternInstrumentationSpec.scala new file mode 100644 index 00000000..5c9905ba --- /dev/null +++ b/kamon-akka/src/test/scala/kamon/instrumentation/akka/AskPatternInstrumentationSpec.scala @@ -0,0 +1,134 @@ +/* + * ========================================================================================= + * 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 kamon.instrumentation.akka + +import java.util.concurrent.atomic.AtomicInteger + +import akka.actor._ +import akka.event.Logging.Warning +import akka.pattern.ask +import akka.testkit.{ TestProbe, TestKitBase } +import akka.util.Timeout +import com.typesafe.config.ConfigFactory +import kamon.Kamon +import kamon.akka.Akka +import kamon.trace.{ TraceContext, TraceContextAware, TraceRecorder } +import org.scalatest.{ BeforeAndAfterAll, Matchers, WordSpecLike } + +import scala.concurrent.duration._ + +class AskPatternInstrumentationSpec extends TestKitBase with WordSpecLike with Matchers with BeforeAndAfterAll { + implicit lazy val system: ActorSystem = ActorSystem("ask-pattern-tracing-spec", + ConfigFactory.parseString("""akka.loggers = ["akka.event.slf4j.Slf4jLogger"]""")) + + implicit val ec = system.dispatcher + implicit val askTimeout = Timeout(10 millis) + + // TODO: Make this work with ActorSelections + + "the AskPatternInstrumentation" when { + "configured in heavyweight mode" should { + "log a warning with a full stack trace and the TraceContext taken from the moment the ask was triggered for a actor" in new NoReplyFixture { + setAskPatternTimeoutWarningMode("heavyweight") + + expectTimeoutWarning() { + TraceRecorder.withNewTraceContext("ask-timeout-warning") { + noReplyActorRef ? "hello" + TraceRecorder.currentContext + } + } + } + } + + "configured in lightweight mode" should { + "log a warning with a short source location description and the TraceContext taken from the moment the ask was triggered for a actor" in new NoReplyFixture { + setAskPatternTimeoutWarningMode("lightweight") + + expectTimeoutWarning(messageSizeLimit = Some(1)) { + TraceRecorder.withNewTraceContext("ask-timeout-warning") { + noReplyActorRef ? "hello" + TraceRecorder.currentContext + } + } + } + } + + "configured in off mode" should { + "should not log any warning messages" in new NoReplyFixture { + setAskPatternTimeoutWarningMode("off") + + expectTimeoutWarning(expectWarning = false) { + TraceRecorder.withNewTraceContext("ask-timeout-warning") { + noReplyActorRef ? "hello" + TraceRecorder.currentContext + } + } + } + } + } + + override protected def afterAll(): Unit = shutdown() + + def expectTimeoutWarning(messageSizeLimit: Option[Int] = None, expectWarning: Boolean = true)(thunk: ⇒ TraceContext): Unit = { + val listener = warningListener() + val testTraceContext = thunk + + if (expectWarning) { + val warning = listener.fishForMessage() { + case Warning(_, _, msg) if msg.toString.startsWith("Timeout triggered for ask pattern registered at") ⇒ true + case others ⇒ false + }.asInstanceOf[Warning] + + warning.asInstanceOf[TraceContextAware].traceContext should equal(testTraceContext) + messageSizeLimit.map { messageLimit ⇒ + warning.message.toString.lines.size should be(messageLimit) + } + } else { + listener.expectNoMsg() + } + } + + def warningListener(): TestProbe = { + val listener = TestProbe() + system.eventStream.subscribe(listener.ref, classOf[Warning]) + listener + } + + def setAskPatternTimeoutWarningMode(mode: String): Unit = { + val target = Kamon(Akka)(system) + val field = target.getClass.getDeclaredField("askPatternTimeoutWarning") + field.setAccessible(true) + field.set(target, mode) + } + + val fixtureCounter = new AtomicInteger(0) + + trait NoReplyFixture { + def noReplyActorRef: ActorRef = system.actorOf(Props[NoReply], "no-reply-" + fixtureCounter.incrementAndGet()) + + def noReplyActorSelection: ActorSelection = { + val target = noReplyActorRef + system.actorSelection(target.path) + } + } +} + +class NoReply extends Actor { + def receive = { + case any ⇒ + } +} |