/*
 * 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 reactor.core.CoreSubscriber;
import reactor.core.Fuseable.ConditionalSubscriber;
import reactor.core.publisher.FluxPeekFuseable.PeekConditionalSubscriber;

Peek into the lifecycle events and signals of a sequence.

The callbacks are all optional.

Crashes by the lambdas are ignored.

Type parameters:
  • <T> – the value type
See Also:
/** * Peek into the lifecycle events and signals of a sequence. * <p> * <p> * The callbacks are all optional. * <p> * <p> * Crashes by the lambdas are ignored. * * @param <T> the value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class MonoLog<T> extends InternalMonoOperator<T, T> { final SignalPeek<T> log; MonoLog(Mono<? extends T> source, SignalPeek<T> log) { super(source); this.log = log; } @Override public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual) { if (actual instanceof ConditionalSubscriber) { @SuppressWarnings("unchecked") // javac, give reason to suppress because inference anomalies ConditionalSubscriber<T> s2 = (ConditionalSubscriber<T>) actual; return new PeekConditionalSubscriber<>(s2, log); } return new FluxPeek.PeekSubscriber<>(actual, log); } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } }