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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 kamon.instrumentation.akka
import akka.actor.{ Actor, Props }
import akka.pattern.{ ask, pipe }
import akka.routing._
import akka.util.Timeout
import kamon.testkit.BaseKamonSpec
import kamon.trace.Tracer
import scala.concurrent.duration._
class ActorCellInstrumentationSpec extends BaseKamonSpec("actor-cell-instrumentation-spec") {
implicit lazy val executionContext = system.dispatcher
"the message passing instrumentation" should {
"propagate the TraceContext using bang" in new EchoActorFixture {
val testTraceContext = Tracer.withContext(newContext("bang-reply")) {
ctxEchoActor ! "test"
Tracer.currentContext
}
expectMsg(testTraceContext)
}
"propagate the TraceContext using tell" in new EchoActorFixture {
val testTraceContext = Tracer.withContext(newContext("tell-reply")) {
ctxEchoActor.tell("test", testActor)
Tracer.currentContext
}
expectMsg(testTraceContext)
}
"propagate the TraceContext using ask" in new EchoActorFixture {
implicit val timeout = Timeout(1 seconds)
val testTraceContext = Tracer.withContext(newContext("ask-reply")) {
// The pipe pattern use Futures internally, so FutureTracing test should cover the underpinnings of it.
(ctxEchoActor ? "test") pipeTo (testActor)
Tracer.currentContext
}
expectMsg(testTraceContext)
}
"propagate the TraceContext to actors behind a simple router" in new EchoSimpleRouterFixture {
val testTraceContext = Tracer.withContext(newContext("router-reply")) {
router.route("test", testActor)
Tracer.currentContext
}
expectMsg(testTraceContext)
}
"propagate the TraceContext to actors behind a pool router" in new EchoPoolRouterFixture {
val testTraceContext = Tracer.withContext(newContext("router-reply")) {
pool ! "test"
Tracer.currentContext
}
expectMsg(testTraceContext)
}
"propagate the TraceContext to actors behind a group router" in new EchoGroupRouterFixture {
val testTraceContext = Tracer.withContext(newContext("router-reply")) {
group ! "test"
Tracer.currentContext
}
expectMsg(testTraceContext)
}
}
override protected def afterAll(): Unit = shutdown()
trait EchoActorFixture {
val ctxEchoActor = system.actorOf(Props[TraceContextEcho])
}
trait EchoSimpleRouterFixture {
val router = {
val routees = Vector.fill(5) {
val r = system.actorOf(Props[TraceContextEcho])
ActorRefRoutee(r)
}
Router(RoundRobinRoutingLogic(), routees)
}
}
trait EchoPoolRouterFixture {
val pool = system.actorOf(RoundRobinPool(nrOfInstances = 5).props(Props[TraceContextEcho]), "pool-router")
}
trait EchoGroupRouterFixture {
val routees = Vector.fill(5) {
system.actorOf(Props[TraceContextEcho])
}
val group = system.actorOf(RoundRobinGroup(routees.map(_.path.toStringWithoutAddress)).props(), "group-router")
}
}
class TraceContextEcho extends Actor {
def receive = {
case msg: String ⇒ sender ! Tracer.currentContext
}
}
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