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/*
 * Copyright (c) 2017-2021 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;

import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import reactor.util.context.Context;

/**
 * A {@link Context} aware subscriber which has relaxed rules for §1.3 and §3.9
 * compared to the original {@link org.reactivestreams.Subscriber} from Reactive Streams.
 * If an invalid request {@code <= 0} is done on the received subscription, the request
 * will not produce an onError and will simply be ignored.
 *
 * 

* The rule relaxation has been initially established under reactive-streams-commons. * * @param the {@link Subscriber} data type * * @since 3.1.0 */ public interface CoreSubscriber extends Subscriber { /** * Request a {@link Context} from dependent components which can include downstream * operators during subscribing or a terminal {@link org.reactivestreams.Subscriber}. * * @return a resolved context or {@link Context#empty()} */ default Context currentContext(){ return Context.empty(); } /** * Implementors should initialize any state used by {@link #onNext(Object)} before * calling {@link Subscription#request(long)}. Should further {@code onNext} related * state modification occur, thread-safety will be required. *

* Note that an invalid request {@code <= 0} will not produce an onError and * will simply be ignored or reported through a debug-enabled * {@link reactor.util.Logger}. * * {@inheritDoc} */ @Override void onSubscribe(Subscription s); }





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