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November 19, 2017 13:31
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import akka.actor.SupervisorStrategy.Restart | |
import akka.actor.{Actor, ActorInitializationException, ActorSystem, OneForOneStrategy, Props} | |
object Main extends App { | |
var attempt: Int = 0 | |
class FailingActor extends Actor { | |
if (attempt == 0) { | |
// throw exception only for the first time, simulating first attempt to create an actor that fails | |
attempt = 1 | |
throw new RuntimeException("failed to create an instance") | |
} | |
override def receive: Receive = { | |
case _ => | |
} | |
override def preStart(): Unit = { | |
// Same behavior when error happens in 'preRestart' | |
// throw new RuntimeException("failed to create an instance") | |
} | |
} | |
class TestSuperVisor extends Actor { | |
context.actorOf(Props(classOf[FailingActor])) | |
override def receive: Receive = { | |
case _ => | |
} | |
override val supervisorStrategy = OneForOneStrategy(loggingEnabled = false) { | |
case _: ActorInitializationException => | |
Restart | |
} | |
} | |
private implicit lazy val system: ActorSystem = ActorSystem("test") | |
system.actorOf(Props(classOf[TestSuperVisor])) | |
Thread.sleep(1000) | |
system.terminate() | |
/* | |
This is unexpected error that gets logged: | |
[ERROR] [11/19/2017 13:52:02.095] [test-akka.actor.default-dispatcher-3] [akka://test/user/$a/$a] a.a.ActorCell changing Recreate into Create after akka.actor.ActorInitializationException: akka://test/user/$a/$a: exception during creation | |
*/ | |
} |
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