/*
* 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
*
* http://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.BiFunction;
import java.util.function.Function;
import org.reactivestreams.Publisher;
import reactor.core.CoreSubscriber;
import reactor.core.Scannable;
import reactor.util.annotation.Nullable;
A decorating Mono
Publisher
that exposes Mono
API over an arbitrary Publisher
Useful to create operators which return a Mono
. Type parameters:
/**
* A decorating {@link Mono} {@link Publisher} that exposes {@link Mono} API over an
* arbitrary {@link Publisher} Useful to create operators which return a {@link Mono}.
*
* @param <I> delegate {@link Publisher} type
* @param <O> produced type
*/
public abstract class MonoOperator<I, O> extends Mono<O> implements Scannable {
protected final Mono<? extends I> source;
Build a MonoOperator
wrapper around the passed parent Publisher
Params: - source – the
Publisher
to decorate
/**
* Build a {@link MonoOperator} wrapper around the passed parent {@link Publisher}
*
* @param source the {@link Publisher} to decorate
*/
protected MonoOperator(Mono<? extends I> source) {
this.source = Objects.requireNonNull(source);
}
@Override
@Nullable
public Object scanUnsafe(Attr key) {
if (key == Attr.PREFETCH) return Integer.MAX_VALUE;
if (key == Attr.PARENT) return source;
return null;
}
}