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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC

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/*
 * Copyright (c) 2016-2023 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.BiConsumer;

import reactor.core.CoreSubscriber;

/**
 * Maps the values of the source publisher one-on-one via a mapper function. If the result is not {code null} then the
 * {@link Mono} will complete with this value.  If the result of the function is {@code null} then the {@link Mono}
 * will complete without a value.
 *
 * @param  the source value type
 * @param  the result value type
 * @see Reactive-Streams-Commons
 */
final class MonoHandle extends InternalMonoOperator {

	final BiConsumer> handler;

	MonoHandle(Mono source, BiConsumer> handler) {
		super(source);
		this.handler = Objects.requireNonNull(handler, "handler");
	}

	@Override
	public CoreSubscriber subscribeOrReturn(CoreSubscriber actual) {
		BiConsumer> handler2 = ContextPropagationSupport.shouldRestoreThreadLocalsInSomeOperators() ?
				ContextPropagation.contextRestoreForHandle(this.handler, actual::currentContext) : this.handler;
		return new FluxHandle.HandleSubscriber<>(actual, handler2);
	}

	@Override
	public Object scanUnsafe(Attr key) {
		if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC;
		return super.scanUnsafe(key);
	}
}