org.neo4j.driver.internal.shaded.reactor.core.publisher.ParallelConcatMap Maven / Gradle / Ivy
/*
* Copyright (c) 2016-2021 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.publisher;
import java.util.Objects;
import java.util.Queue;
import java.util.function.Function;
import java.util.function.Supplier;
import org.reactivestreams.Publisher;
import reactor.core.CoreSubscriber;
import reactor.core.Scannable;
import reactor.core.publisher.FluxConcatMap.ErrorMode;
import reactor.util.annotation.Nullable;
/**
* Concatenates the generated Publishers on each rail.
*
* @param the input value type
* @param the output value type
*/
final class ParallelConcatMap extends ParallelFlux implements Scannable{
final ParallelFlux source;
final Function> mapper;
final Supplier> queueSupplier;
final int prefetch;
final ErrorMode errorMode;
ParallelConcatMap(
ParallelFlux source,
Function> mapper,
Supplier> queueSupplier,
int prefetch, ErrorMode errorMode) {
this.source = source;
this.mapper = Objects.requireNonNull(mapper, "mapper");
this.queueSupplier = Objects.requireNonNull(queueSupplier, "queueSupplier");
this.prefetch = prefetch;
this.errorMode = Objects.requireNonNull(errorMode, "errorMode");
}
@Override
@Nullable
public Object scanUnsafe(Attr key) {
if (key == Attr.PARENT) return source;
if (key == Attr.PREFETCH) return getPrefetch();
if (key == Attr.DELAY_ERROR) return errorMode != ErrorMode.IMMEDIATE;
if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC;
return null;
}
@Override
public int getPrefetch() {
return prefetch;
}
@Override
public int parallelism() {
return source.parallelism();
}
@Override
public void subscribe(CoreSubscriber[] subscribers) {
if (!validate(subscribers)) {
return;
}
int n = subscribers.length;
@SuppressWarnings("unchecked")
CoreSubscriber[] parents = new CoreSubscriber[n];
for (int i = 0; i < n; i++) {
parents[i] = FluxConcatMap.subscriber(subscribers[i], mapper,
queueSupplier, prefetch, errorMode);
}
source.subscribe(parents);
}
}