Created
April 27, 2017 18:28
-
-
Save osi/df0fb7a4cbb721baa0bd0ff9aa12b5f5 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import org.reactivestreams.Publisher; | |
import org.reactivestreams.Subscriber; | |
import org.reactivestreams.Subscription; | |
import reactor.core.publisher.Flux; | |
import reactor.core.publisher.Mono; | |
import java.time.Duration; | |
import java.util.concurrent.atomic.AtomicBoolean; | |
public class DelayCancelPublisher<T> implements Publisher<T> { | |
private final Publisher<T> upstream; | |
private final Mono<Long> delay; | |
public DelayCancelPublisher(Publisher<T> upstream, Duration duration) { | |
this.upstream = upstream; | |
this.delay = Mono.delay(duration); | |
} | |
public static <T> Flux<T> delayCancel(Publisher<T> upstream, Duration duration) { | |
return Flux.from(new DelayCancelPublisher<>(upstream, duration)); | |
} | |
@Override | |
public void subscribe(Subscriber<? super T> s) { | |
upstream.subscribe(new DelayCancelSubscriber<>(s, delay)); | |
} | |
private static class DelayCancelSubscriber<T> implements Subscriber<T> { | |
private final Subscriber<? super T> subscriber; | |
private final Mono<Long> delay; | |
private final AtomicBoolean cancelled = new AtomicBoolean(); | |
public DelayCancelSubscriber(Subscriber<? super T> subscriber, Mono<Long> delay) { | |
this.subscriber = subscriber; | |
this.delay = delay; | |
} | |
@Override | |
public void onSubscribe(Subscription upstream) { | |
subscriber.onSubscribe(new Subscription() { | |
@Override | |
public void request(long n) { | |
upstream.request(n); | |
} | |
@Override | |
public void cancel() { | |
if (cancelled.compareAndSet(false, true)) { | |
delay.subscribe(v -> upstream.cancel()); | |
} | |
} | |
}); | |
} | |
@Override | |
public void onNext(T t) { | |
if (!cancelled.get()) { | |
subscriber.onNext(t); | |
} | |
} | |
@Override | |
public void onError(Throwable t) { | |
subscriber.onError(t); | |
} | |
@Override | |
public void onComplete() { | |
subscriber.onComplete(); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment