/*
 * Copyright (c) 2019-Present 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 java.util.Objects;
import java.util.function.Function;

import org.reactivestreams.Publisher;

import reactor.core.CoreSubscriber;
import reactor.util.context.Context;
import reactor.util.context.ContextView;

Defers the creation of the actual Publisher the Subscriber will be subscribed to.
Type parameters:
  • <T> – the value type
See Also:
/** * Defers the creation of the actual Publisher the Subscriber will be subscribed to. * * @param <T> the value type * * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class FluxDeferContextual<T> extends Flux<T> implements SourceProducer<T> { final Function<ContextView, ? extends Publisher<? extends T>> contextualPublisherFactory; FluxDeferContextual(Function<ContextView, ? extends Publisher<? extends T>> contextualPublisherFactory) { this.contextualPublisherFactory = Objects.requireNonNull(contextualPublisherFactory, "contextualPublisherFactory"); } @Override public void subscribe(CoreSubscriber<? super T> actual) { Publisher<? extends T> p; Context ctx = actual.currentContext(); try { p = Objects.requireNonNull(contextualPublisherFactory.apply(ctx.readOnly()), "The Publisher returned by the contextualPublisherFactory is null"); } catch (Throwable e) { Operators.error(actual, Operators.onOperatorError(e, ctx)); return; } from(p).subscribe(actual); } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return null; } }