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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex.rxjava3.internal.jdk8;
import java.util.Objects;
import java.util.function.*;
import java.util.stream.Collector;
import org.reactivestreams.Subscription;
import io.reactivex.rxjava3.annotations.NonNull;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.exceptions.Exceptions;
import io.reactivex.rxjava3.internal.disposables.EmptyDisposable;
import io.reactivex.rxjava3.internal.fuseable.FuseToFlowable;
import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
/**
* Collect items into a container defined by a Stream {@link Collector} callback set.
*
* @param the upstream value type
* @param the intermediate accumulator type
* @param the result type
* @since 3.0.0
*/
public final class FlowableCollectWithCollectorSingle extends Single implements FuseToFlowable {
final Flowable source;
final Collector super T, A, R> collector;
public FlowableCollectWithCollectorSingle(Flowable source, Collector super T, A, R> collector) {
this.source = source;
this.collector = collector;
}
@Override
public Flowable fuseToFlowable() {
return new FlowableCollectWithCollector<>(source, collector);
}
@Override
protected void subscribeActual(@NonNull SingleObserver super R> observer) {
A container;
BiConsumer accumulator;
Function finisher;
try {
container = collector.supplier().get();
accumulator = collector.accumulator();
finisher = collector.finisher();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
EmptyDisposable.error(ex, observer);
return;
}
source.subscribe(new CollectorSingleObserver<>(observer, container, accumulator, finisher));
}
static final class CollectorSingleObserver implements FlowableSubscriber, Disposable {
final SingleObserver super R> downstream;
final BiConsumer accumulator;
final Function finisher;
Subscription upstream;
boolean done;
A container;
CollectorSingleObserver(SingleObserver super R> downstream, A container, BiConsumer accumulator, Function finisher) {
this.downstream = downstream;
this.container = container;
this.accumulator = accumulator;
this.finisher = finisher;
}
@Override
public void onSubscribe(@NonNull Subscription s) {
if (SubscriptionHelper.validate(this.upstream, s)) {
this.upstream = s;
downstream.onSubscribe(this);
s.request(Long.MAX_VALUE);
}
}
@Override
public void onNext(T t) {
if (done) {
return;
}
try {
accumulator.accept(container, t);
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
upstream.cancel();
onError(ex);
}
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
} else {
done = true;
upstream = SubscriptionHelper.CANCELLED;
this.container = null;
downstream.onError(t);
}
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
upstream = SubscriptionHelper.CANCELLED;
A container = this.container;
this.container = null;
R result;
try {
result = Objects.requireNonNull(finisher.apply(container), "The finisher returned a null value");
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
downstream.onError(ex);
return;
}
downstream.onSuccess(result);
}
@Override
public void dispose() {
upstream.cancel();
upstream = SubscriptionHelper.CANCELLED;
}
@Override
public boolean isDisposed() {
return upstream == SubscriptionHelper.CANCELLED;
}
}
}
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