/*
 * 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
 *
 *       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.Consumer;

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

Delays the subscription to the main source until another Publisher signals a value or completes.
Type parameters:
  • <T> – the main source value type
  • <U> – the other source type
See Also:
/** * Delays the subscription to the main source until another Publisher * signals a value or completes. * * @param <T> the main source value type * @param <U> the other source type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class MonoDelaySubscription<T, U> extends InternalMonoOperator<T, T> implements Consumer<FluxDelaySubscription.DelaySubscriptionOtherSubscriber<T, U>> { final Publisher<U> other; MonoDelaySubscription(Mono<? extends T> source, Publisher<U> other) { super(source); this.other = Objects.requireNonNull(other, "other"); } @Override public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual) { other.subscribe(new FluxDelaySubscription.DelaySubscriptionOtherSubscriber<>( actual, this)); return null; } @Override public void accept(FluxDelaySubscription.DelaySubscriptionOtherSubscriber<T, U> s) { source.subscribe(new FluxDelaySubscription.DelaySubscriptionMainSubscriber<>(s.actual, s)); } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } }