db0a473cd5
* use CompletionStage instead of Future in FactorialBackend.java #22393 * use CompletionStage instead of Future in FactorialBackend.java #22393 2
59 lines
1.6 KiB
Java
59 lines
1.6 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 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.PatternsCS.pipe;
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import java.util.concurrent.CompletableFuture;
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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(this::notifyMeOnOpen);
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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, "is my middle name"::equals, m -> pipe(
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breaker.callWithCircuitBreakerCS(() ->
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CompletableFuture.supplyAsync(this::dangerousCall)
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), getContext().dispatcher()
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).to(sender()))
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.match(String.class, "block for me"::equals, m -> {
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sender().tell(breaker
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.callWithSyncCircuitBreaker(this::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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