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 * Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
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package reactor.core.publisher;


import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import reactor.core.CoreSubscriber;
import reactor.util.annotation.Nullable;
import reactor.util.context.Context;

Detaches the both the child Subscriber and the Subscription on termination or cancellation.

This should help with odd retention scenarios when running wit non Rx mentality based Publishers.

Type parameters:
  • <T> – the value type
See Also:
/** * Detaches the both the child Subscriber and the Subscription on * termination or cancellation. * <p>This should help with odd retention scenarios when running * wit non Rx mentality based Publishers. * * @param <T> the value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class FluxDetach<T> extends FluxOperator<T, T> { FluxDetach(Flux<? extends T> source) { super(source); } @Override public void subscribe(CoreSubscriber<? super T> actual) { source.subscribe(new DetachSubscriber<>(actual)); } static final class DetachSubscriber<T> implements InnerOperator<T, T> { CoreSubscriber<? super T> actual; Subscription s; DetachSubscriber(CoreSubscriber<? super T> actual) { this.actual = actual; } @Override public Context currentContext() { return actual == null ? Context.empty() : actual.currentContext(); } @Override @Nullable public Object scanUnsafe(Attr key) { if (key == Attr.PARENT) return s; if (key == Attr.TERMINATED) return actual == null; if (key == Attr.CANCELLED) return actual == null && s == null; return InnerOperator.super.scanUnsafe(key); } @Override public void onSubscribe(Subscription s) { if (Operators.validate(this.s, s)) { this.s = s; actual.onSubscribe(this); } } @Override public void onNext(T t) { Subscriber<? super T> a = actual; if (a != null) { a.onNext(t); } } @Override public void onError(Throwable t) { Subscriber<? super T> a = actual; if (a != null) { actual = null; s = null; a.onError(t); } } @Override public CoreSubscriber<? super T> actual() { return actual; } @Override public void onComplete() { Subscriber<? super T> a = actual; if (a != null) { actual = null; s = null; a.onComplete(); } } @Override public void request(long n) { Subscription a = s; if (a != null) { a.request(n); } } @Override public void cancel() { Subscription a = s; if (a != null) { actual = null; s = null; a.cancel(); } } } }