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package kamon.instrumentation.akka
import akka.actor.SupervisorStrategy.Resume
import akka.actor._
import akka.pattern.{ ask, pipe }
import akka.remote.RemoteScope
import akka.routing.RoundRobinGroup
import akka.testkit.{ ImplicitSender, TestKitBase }
import akka.util.Timeout
import com.typesafe.config.ConfigFactory
import kamon.Kamon
import kamon.trace.Tracer
import org.scalatest.{ Matchers, WordSpecLike }
import scala.concurrent.duration._
import scala.util.control.NonFatal
class RemotingInstrumentationSpec extends TestKitBase with WordSpecLike with Matchers with ImplicitSender {
implicit lazy val system: ActorSystem = {
Kamon.start()
ActorSystem("remoting-spec-local-system", ConfigFactory.parseString(
"""
|akka {
| loggers = ["akka.event.slf4j.Slf4jLogger"]
|
| actor {
| provider = "akka.remote.RemoteActorRefProvider"
| }
| remote {
| enabled-transports = ["akka.remote.netty.tcp"]
| netty.tcp {
| hostname = "127.0.0.1"
| port = 2552
| }
| }
|}
""".stripMargin))
}
val remoteSystem: ActorSystem = ActorSystem("remoting-spec-remote-system", ConfigFactory.parseString(
"""
|akka {
| loggers = ["akka.event.slf4j.Slf4jLogger"]
|
| actor {
| provider = "akka.remote.RemoteActorRefProvider"
| }
| remote {
| enabled-transports = ["akka.remote.netty.tcp"]
| netty.tcp {
| hostname = "127.0.0.1"
| port = 2553
| }
| }
|}
""".stripMargin))
val RemoteSystemAddress = AddressFromURIString("akka.tcp://remoting-spec-remote-system@127.0.0.1:2553")
import Kamon.tracer
"The Remoting instrumentation" should {
"propagate the TraceContext when creating a new remote actor" in {
Tracer.withContext(tracer.newContext("deploy-remote-actor", "deploy-remote-actor-1")) {
system.actorOf(TraceTokenReplier.remoteProps(Some(testActor), RemoteSystemAddress), "remote-deploy-fixture")
}
expectMsg("name=deploy-remote-actor|token=deploy-remote-actor-1|isOpen=true")
}
"propagate the TraceContext when sending a message to a remotely deployed actor" in {
val remoteRef = system.actorOf(TraceTokenReplier.remoteProps(None, RemoteSystemAddress), "remote-message-fixture")
Tracer.withContext(tracer.newContext("message-remote-actor", "message-remote-actor-1")) {
remoteRef ! "reply-trace-token"
}
expectMsg("name=message-remote-actor|token=message-remote-actor-1|isOpen=true")
}
"propagate the TraceContext when pipe or ask a message to a remotely deployed actor" in {
implicit val ec = system.dispatcher
implicit val askTimeout = Timeout(10 seconds)
val remoteRef = system.actorOf(TraceTokenReplier.remoteProps(None, RemoteSystemAddress), "remote-ask-and-pipe-fixture")
Tracer.withContext(tracer.newContext("ask-and-pipe-remote-actor", "ask-and-pipe-remote-actor-1")) {
(remoteRef ? "reply-trace-token") pipeTo (testActor)
}
expectMsg("name=ask-and-pipe-remote-actor|token=ask-and-pipe-remote-actor-1|isOpen=true")
}
"propagate the TraceContext when sending a message to an ActorSelection" in {
remoteSystem.actorOf(TraceTokenReplier.props(None), "actor-selection-target-a")
remoteSystem.actorOf(TraceTokenReplier.props(None), "actor-selection-target-b")
val selection = system.actorSelection(RemoteSystemAddress + "/user/actor-selection-target-*")
Tracer.withContext(tracer.newContext("message-remote-actor-selection", "message-remote-actor-selection-1")) {
selection ! "reply-trace-token"
}
// one for each selected actor
expectMsg("name=message-remote-actor-selection|token=message-remote-actor-selection-1|isOpen=true")
expectMsg("name=message-remote-actor-selection|token=message-remote-actor-selection-1|isOpen=true")
}
"propagate the TraceContext a remotely supervised child fails" in {
val supervisor = system.actorOf(Props(new SupervisorOfRemote(testActor, RemoteSystemAddress)))
Tracer.withContext(tracer.newContext("remote-supervision", "remote-supervision-1")) {
supervisor ! "fail"
}
expectMsg("name=remote-supervision|token=remote-supervision-1|isOpen=true")
}
"propagate the TraceContext when sending messages to remote routees of a router" in {
remoteSystem.actorOf(TraceTokenReplier.props(None), "remote-routee")
val router = system.actorOf(RoundRobinGroup(List(RemoteSystemAddress + "/user/actor-selection-target-*")).props(), "router")
Tracer.withContext(tracer.newContext("remote-routee", "remote-routee-1")) {
router ! "reply-trace-token"
}
expectMsg("name=remote-routee|token=remote-routee-1|isOpen=true")
}
}
}
class TraceTokenReplier(creationTraceContextListener: Option[ActorRef]) extends Actor with ActorLogging {
creationTraceContextListener map { recipient ⇒
recipient ! currentTraceContextInfo
}
def receive = {
case "fail" ⇒
throw new ArithmeticException("Division by zero.")
case "reply-trace-token" ⇒
sender ! currentTraceContextInfo
}
def currentTraceContextInfo: String = {
val ctx = Tracer.currentContext
s"name=${ctx.name}|token=${ctx.token}|isOpen=${ctx.isOpen}"
}
}
object TraceTokenReplier {
def props(creationTraceContextListener: Option[ActorRef]): Props =
Props(new TraceTokenReplier(creationTraceContextListener))
def remoteProps(creationTraceContextListener: Option[ActorRef], remoteAddress: Address): Props = {
Props(new TraceTokenReplier(creationTraceContextListener))
.withDeploy(Deploy(scope = RemoteScope(remoteAddress)))
}
}
class SupervisorOfRemote(traceContextListener: ActorRef, remoteAddress: Address) extends Actor {
val supervisedChild = context.actorOf(TraceTokenReplier.remoteProps(None, remoteAddress), "remotely-supervised-child")
def receive = {
case "fail" ⇒ supervisedChild ! "fail"
}
override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy() {
case NonFatal(throwable) ⇒
traceContextListener ! currentTraceContextInfo
Resume
}
def currentTraceContextInfo: String = {
val ctx = Tracer.currentContext
s"name=${ctx.name}|token=${ctx.token}|isOpen=${ctx.isOpen}"
}
}
|
