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org.neo4j.driver.internal.shaded.reactor.core.publisher.MonoRepeatWhen Maven / Gradle / Ivy

/*
 * Copyright (c) 2016-2021 VMware Inc. or its affiliates, 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
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package reactor.core.publisher;

import java.util.Objects;
import java.util.function.Function;

import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;
import reactor.core.CoreSubscriber;

/**
 * Repeats a source when a companion sequence signals an item in response to the main's
 * completion signal
 * 

*

If the companion sequence signals when the main source is active, the repeat attempt * is suppressed and any terminal signal will terminate the main source with the same * signal immediately. * * @param the source value type * * @see Reactive-Streams-Commons */ final class MonoRepeatWhen extends FluxFromMonoOperator { final Function, ? extends Publisher> whenSourceFactory; MonoRepeatWhen(Mono source, Function, ? extends Publisher> whenSourceFactory) { super(source); this.whenSourceFactory = Objects.requireNonNull(whenSourceFactory, "whenSourceFactory"); } @Override public CoreSubscriber subscribeOrReturn(CoreSubscriber actual) { FluxRepeatWhen.RepeatWhenOtherSubscriber other = new FluxRepeatWhen.RepeatWhenOtherSubscriber(); CoreSubscriber serial = Operators.serialize(actual); FluxRepeatWhen.RepeatWhenMainSubscriber main = new FluxRepeatWhen.RepeatWhenMainSubscriber<>(serial, other.completionSignal, source); other.main = main; serial.onSubscribe(main); Publisher p; try { p = Objects.requireNonNull(whenSourceFactory.apply(other), "The whenSourceFactory returned a null Publisher"); } catch (Throwable e) { actual.onError(Operators.onOperatorError(e, actual.currentContext())); return null; } p.subscribe(other); if (!main.cancelled) { return main; } else { return null; } } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } }





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