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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
 *
 *       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
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package reactor.core.publisher;

import java.util.function.Consumer;
import java.util.function.LongConsumer;

import org.reactivestreams.Subscription;
import reactor.core.CoreSubscriber;
import reactor.core.Fuseable.ConditionalSubscriber;
import reactor.core.publisher.FluxPeekFuseable.PeekConditionalSubscriber;
import reactor.util.annotation.Nullable;

Peeks out values that make a filter function return false.
Type parameters:
  • <T> – the value type
See Also:
/** * Peeks out values that make a filter function return false. * * @param <T> the value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class MonoPeek<T> extends InternalMonoOperator<T, T> implements SignalPeek<T> { final Consumer<? super Subscription> onSubscribeCall; final Consumer<? super T> onNextCall; final LongConsumer onRequestCall; final Runnable onCancelCall; MonoPeek(Mono<? extends T> source, @Nullable Consumer<? super Subscription> onSubscribeCall, @Nullable Consumer<? super T> onNextCall, @Nullable LongConsumer onRequestCall, @Nullable Runnable onCancelCall) { super(source); this.onSubscribeCall = onSubscribeCall; this.onNextCall = onNextCall; this.onRequestCall = onRequestCall; this.onCancelCall = onCancelCall; } @Override @SuppressWarnings("unchecked") public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual) { if (actual instanceof ConditionalSubscriber) { return new PeekConditionalSubscriber<>( (ConditionalSubscriber<? super T>) actual, this); } return new FluxPeek.PeekSubscriber<>(actual, this); } @Override @Nullable public Consumer<? super Subscription> onSubscribeCall() { return onSubscribeCall; } @Override @Nullable public Consumer<? super T> onNextCall() { return onNextCall; } @Override @Nullable public Consumer<? super Throwable> onErrorCall() { return null; } @Override @Nullable public Runnable onCompleteCall() { return null; } @Override @Nullable public Runnable onAfterTerminateCall() { return null; } @Override @Nullable public LongConsumer onRequestCall() { return onRequestCall; } @Override @Nullable public Runnable onCancelCall() { return onCancelCall; } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } }