我有一名主工，有一名监督员监督其童工。 子工作者抛出一个IOException，由父母查看，然后调用SupervisorStartegy的resume（）方法。
直到现在这个摘要被抛出，异常被转移到父级，父级正在调用简历但之后我得到了超时异常
public class EmailServiceActor extends UntypedActor{
ActorRef actorRef ;
private static SupervisorStrategy strategy =
new OneForOneStrategy(3, Duration.create("1 minute"),
new Function<Throwable, Directive>() {
@Override
public Directive apply(Throwable t) {
if (t instanceof IOException) {
System.out.println("IO Exception occurred");
return restart();
} else if (t instanceof Exception) {
return stop();
} else {
return escalate();
}
}
});
@Override
public void onReceive(Object message) {
System.out.println("Received .....");
if(message instanceof MyLocalMessage){
System.out.println("received instr from EmailServiceWorker by EmailServiceActor");
actorRef.tell(message, self());
}else{
actorRef = getSender();
System.out.println("received instr by EmailServiceActor from Application");
getContext().actorOf(Props.create(EmailServiceWorker.class),"EmailServiceWorker").tell(message, self());
}
}
@Override
public SupervisorStrategy supervisorStrategy() {
return strategy;
}
@Override
public void preStart() {
System.out.println("Pre Restart...");
}
}
我也有一名童工
public class EmailServiceWorker extends UntypedActor{
@Override
public void onReceive(Object message) throws IOException{
System.out.println("received instr by EmailServiceWorker");
System.out.println("Sending mail");
FileReader reader = new FileReader("someFile");
MyLocalMessage myLocalMessage = new MyLocalMessage("Hello");
getSender().tell( myLocalMessage, getSelf() );
getContext().stop(getSelf());
}
@Override
public void preStart() {
System.out.println("Pre Restart");
}
}
没有＆＃34; someFile＆＃34;这样的文件。我故意试图提出错误。
控制器如下 public class Application extends Controller {
//We need the ActorSystem to host our actors as well as to send and receive messages
static ActorSystem actorSystem = ActorSystem.create( "play" );
static {
// Create our local actors
actorSystem.actorOf( Props.create( MainActor.class ), "MainActor" );
actorSystem.actorOf( Props.create( EmailServiceActor.class ), "EmailServiceActor" );
}
public static Result index() {
return ok(index.render("Your new application is ready."));
}
@SuppressWarnings("unchecked")
public static Promise<Result> localHello( String name )
{
// Look up the actor
ActorSelection myActor =
actorSystem.actorSelection( "user/MainActor" );
// Connstruct our message
MyMessage message = new MyMessage( name );
// As the actor for a response to the message (and a 30 second timeout);
// ask returns an Akka Future, so we wrap it with a Play Promise
Future future = ask(myActor, message, 30000);
Promise promiseValue = Promise.wrap(future);
Function<Object, Result> function = new Function<Object, Result>() {
public Result apply(Object response) {
if( response instanceof MyLocalMessage ) {
MyLocalMessage message = ( MyLocalMessage )response;
return ok( message.getMessage() );
}
return notFound( "Message is not of type MyMessage" );
}
};
Promise<Result> promiseResult = promiseValue.map(function);
return promiseResult;
}
public static Promise<Result> sendMail(){
ActorSelection emailActor = actorSystem.actorSelection("user/EmailServiceActor");
Future future = ask(emailActor,"Hello",190000);
// Look up the actor
Promise promiseValue = Promise.wrap(future);
Function<Object, Result> function = new Function<Object, Result>(){
public Result apply(Object response) {
return ok("Email is being sent");
}
};
Promise<Result> promiseResult = promiseValue.map(function);
return promiseResult;
}
}
但是当我运行应用程序时，我收到了错误
Pre Restart...
Received .....
received instr by EmailServiceActor from Application
Pre Restart
received instr by EmailServiceWorker
Sending mail
IO Exception occurred
Pre Restart
[ERROR] [08/12/2014 10:53:13.844] [play-akka.actor.default-dispatcher-5] [akka://play/user/EmailServiceActor/EmailServiceWorker] someFile (No such file or directory)
java.io.FileNotFoundException: someFile (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileInputStream.<init>(FileInputStream.java:101)
at java.io.FileReader.<init>(FileReader.java:58)
at actors.EmailServiceWorker.onReceive(EmailServiceWorker.java:18)
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)
at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
at akka.dispatch.Mailbox.run(Mailbox.scala:220)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
[error] play - Cannot invoke the action, eventually got an error: akka.pattern.AskTimeoutException: Ask timed out on [ActorSelection[Anchor(akka://play/), Path(/user/EmailServiceActor)]] after [190000 ms]
[error] application -
! @6j77j81fk - Internal server error, for (GET) [/sendmail] ->
play.api.Application$$anon$1: Execution exception[[AskTimeoutException: Ask timed out on [ActorSelection[Anchor(akka://play/), Path(/user/EmailServiceActor)]] after [190000 ms]]]
at play.api.Application$class.handleError(Application.scala:296) ~[play_2.11-2.3.2.jar:2.3.2]
at play.api.DefaultApplication.handleError(Application.scala:402) [play_2.11-2.3.2.jar:2.3.2]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320) [play_2.11-2.3.2.jar:2.3.2]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320) [play_2.11-2.3.2.jar:2.3.2]
at scala.Option.map(Option.scala:145) [scala-library-2.11.1.jar:na]
Caused by: akka.pattern.AskTimeoutException: Ask timed out on [ActorSelection[Anchor(akka://play/), Path(/user/EmailServiceActor)]] after [190000 ms]
at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:333) ~[akka-actor_2.11-2.3.4.jar:na]
at akka.actor.Scheduler$$anon$7.run(Scheduler.scala:117) ~[akka-actor_2.11-2.3.4.jar:na]
at scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:599) ~[scala-library-2.11.1.jar:na]
at scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109) ~[scala-library-2.11.1.jar:na]
at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:597) ~[scala-library-2.11.1.jar:na]
答案 0 :(得分：0)
您的EmailServiceWorker演员从未回复发件人，因此控制器中的ask永远无法完成。