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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);
}