Using 2.3.0 akka-actor and 2.3.1 akka-actor, and checked with 1.7.0 and 1.8
JVM:
The following code generates a strange compile exception:
package akkastudy.supervisorstrategy.java;
import akka.actor.AllForOneStrategy;
import akka.actor.Props;
import akka.actor.SupervisorStrategy;
import akka.actor.UntypedActor;
import akka.japi.Function;
import scala.concurrent.duration.Duration;
import java.util.concurrent.TimeUnit;
import static akka.actor.SupervisorStrategy.*;
public class AllForOneGrandparentActor extends UntypedActor {
@Override
public SupervisorStrategy supervisorStrategy() {
return new AllForOneStrategy(10, Duration.create(1, TimeUnit.HOURS),
new Function<Throwable, SupervisorStrategy.Directive>() {
@Override
public SupervisorStrategy.Directive apply(Throwable
param) throws Exception {
if (param instanceof IllegalArgumentException)
return stop();
if (param instanceof ArithmeticException) return
resume();
if (param instanceof NullPointerException) return
restart();
else return escalate();
}
}
);
}
@Override
public void onReceive(Object message) throws Exception {
if (message instanceof Props) {
Props props = (Props) message;
getSender().tell(getContext().actorOf(props), self());
} else unhandled(message);
}
}
Where the exception is:
[info] Compiling 18 Scala sources and 15 Java sources to
/home/danno/development/akka-study/target/scala-2.10/classes...
[error]
/home/danno/development/akka-study/src/main/java/akkastudy/supervisorstrategy/java/OneForOneGrandparentActor.java:12:
error: cannot access 1
[error] import static akka.actor.SupervisorStrategy.*;
[error] ^
[error] class file for akka.actor.SupervisorStrategy$1 not found
[error]
/home/danno/development/akka-study/src/main/java/akkastudy/supervisorstrategy/java/OneForOneGrandparentActor.java:21:
error: cannot find symbol
[error] if (param instanceof
IllegalArgumentException) return stop();
[error]
^
[error] symbol: method stop()
[error]
/home/danno/development/akka-study/src/main/java/akkastudy/supervisorstrategy/java/OneForOneGrandparentActor.java:22:
error: cannot find symbol
[error] if (param instanceof ArithmeticException)
return resume();
[error]
^
[error] symbol: method resume()
[error]
/home/danno/development/akka-study/src/main/java/akkastudy/supervisorstrategy/java/OneForOneGrandparentActor.java:23:
error: cannot find symbol
[error] if (param instanceof NullPointerException)
return restart();
[error]
^
[error] symbol: method restart()
[error]
/home/danno/development/akka-study/src/main/java/akkastudy/supervisorstrategy/java/OneForOneGrandparentActor.java:24:
error: cannot find symbol
[error] else return escalate();
[error] ^
[error] symbol: method escalate()
The workaround would be to explicitly call SupervisorStrategy.resume() and
SupervisorStrategy.stop(), etc. without the static import. This had worked
previously.
Does the problem occur elsewhere, like in the actual Scala and Java interop
itself? or is this an Akka issue?
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