4bd6b7aab1
* Receive class that wraps PartialFunction, to avoid
scary scala types
* move AbstractActorContext to AbstractActor.ActorContext
* converting docs, many, many UntypedActor
* removing UntypedActor docs
* add unit test for ReceiveBuilder
* MiMa filters
* consistent use of getContext(), self(), sender()
* rename cross references
* migration guide
* skip samples for now
* improve match type safetyi, add matchUnchecked
* the `? extends P` caused code like this to compile:
`match(String.class, (Integer i) -> {})`
* added matchUnchecked, since it can still be useful (um, convenient)
to be able to do:
`matchUnchecked(List.class, (List<String> list) -> {})`
* eleminate some scala.Option
* preRestart
* findChild
* ActorIdentity.getActorRef
68 lines
1.8 KiB
Java
68 lines
1.8 KiB
Java
/**
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* Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
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*/
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package docs.circuitbreaker;
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//#imports1
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import akka.actor.AbstractActor;
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import scala.concurrent.Future;
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import akka.event.LoggingAdapter;
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import scala.concurrent.duration.Duration;
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import akka.pattern.CircuitBreaker;
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import akka.event.Logging;
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import static akka.pattern.Patterns.pipe;
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import static akka.dispatch.Futures.future;
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import java.util.concurrent.Callable;
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//#imports1
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//#circuit-breaker-initialization
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public class DangerousJavaActor extends AbstractActor {
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private final CircuitBreaker breaker;
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private final LoggingAdapter log = Logging.getLogger(getContext().system(), this);
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public DangerousJavaActor() {
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this.breaker = new CircuitBreaker(
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getContext().dispatcher(), getContext().system().scheduler(),
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5, Duration.create(10, "s"), Duration.create(1, "m"))
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.onOpen(new Runnable() {
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public void run() {
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notifyMeOnOpen();
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}
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});
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}
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public void notifyMeOnOpen() {
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log.warning("My CircuitBreaker is now open, and will not close for one minute");
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}
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//#circuit-breaker-initialization
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//#circuit-breaker-usage
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public String dangerousCall() {
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return "This really isn't that dangerous of a call after all";
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}
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@Override
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public Receive createReceive() {
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return receiveBuilder().
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match(String.class, m -> "is my middle name".equals(m), m -> {
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pipe(
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breaker.callWithCircuitBreaker(() ->
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future(() -> dangerousCall(), getContext().dispatcher())
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), getContext().dispatcher()
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).to(sender());
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})
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.match(String.class, m -> "block for me".equals(m), m -> {
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sender().tell(breaker
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.callWithSyncCircuitBreaker(
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() -> dangerousCall()), self());
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})
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.build();
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}
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//#circuit-breaker-usage
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}
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