/*
 * 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.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

import reactor.core.CoreSubscriber;
import reactor.core.Scannable;
import reactor.util.annotation.Nullable;
import reactor.util.function.Tuple2;
import reactor.util.function.Tuples;

Hides the identities of the upstream Publisher object and its Subscription as well.
Type parameters:
  • <T> – the value type
See Also:
/** * Hides the identities of the upstream Publisher object and its Subscription as well. * * @param <T> the value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class ParallelFluxName<T> extends ParallelFlux<T> implements Scannable{ final ParallelFlux<T> source; final String name; final Set<Tuple2<String, String>> tags; @SuppressWarnings("unchecked") static <T> ParallelFlux<T> createOrAppend(ParallelFlux<T> source, String name) { Objects.requireNonNull(name, "name"); if (source instanceof ParallelFluxName) { ParallelFluxName<T> s = (ParallelFluxName<T>) source; return new ParallelFluxName<>(s.source, name, s.tags); } return new ParallelFluxName<>(source, name, null); } @SuppressWarnings("unchecked") static <T> ParallelFlux<T> createOrAppend(ParallelFlux<T> source, String tagName, String tagValue) { Objects.requireNonNull(tagName, "tagName"); Objects.requireNonNull(tagValue, "tagValue"); Set<Tuple2<String, String>> tags = Collections.singleton(Tuples.of(tagName, tagValue)); if (source instanceof ParallelFluxName) { ParallelFluxName<T> s = (ParallelFluxName<T>) source; if(s.tags != null) { tags = new HashSet<>(tags); tags.addAll(s.tags); } return new ParallelFluxName<>(s.source, s.name, tags); } return new ParallelFluxName<>(source, null, tags); } ParallelFluxName(ParallelFlux<T> source, @Nullable String name, @Nullable Set<Tuple2<String, String>> tags) { this.source = source; this.name = name; this.tags = tags; } @Override public int getPrefetch() { return source.getPrefetch(); } @Override public int parallelism() { return source.parallelism(); } @Nullable @Override public Object scanUnsafe(Attr key) { if (key == Attr.NAME) { return name; } if (key == Attr.TAGS && tags != null) { return tags.stream(); } if (key == Attr.PARENT) return source; if (key == Attr.PREFETCH) return getPrefetch(); return null; } @Override public void subscribe(CoreSubscriber<? super T>[] subscribers) { source.subscribe(subscribers); } }