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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.operators.observable;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import io.reactivex.rxjava3.annotations.Nullable;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.*;
import io.reactivex.rxjava3.exceptions.Exceptions;
import io.reactivex.rxjava3.functions.Function;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.internal.observers.BasicIntQueueDisposable;
import io.reactivex.rxjava3.internal.util.AtomicThrowable;
/**
* Maps a sequence of values into CompletableSources and awaits their termination.
* @param the value type
*/
public final class ObservableFlatMapCompletable extends AbstractObservableWithUpstream {
final Function super T, ? extends CompletableSource> mapper;
final boolean delayErrors;
public ObservableFlatMapCompletable(ObservableSource source,
Function super T, ? extends CompletableSource> mapper, boolean delayErrors) {
super(source);
this.mapper = mapper;
this.delayErrors = delayErrors;
}
@Override
protected void subscribeActual(Observer super T> observer) {
source.subscribe(new FlatMapCompletableMainObserver<>(observer, mapper, delayErrors));
}
static final class FlatMapCompletableMainObserver extends BasicIntQueueDisposable
implements Observer {
private static final long serialVersionUID = 8443155186132538303L;
final Observer super T> downstream;
final AtomicThrowable errors;
final Function super T, ? extends CompletableSource> mapper;
final boolean delayErrors;
final CompositeDisposable set;
Disposable upstream;
volatile boolean disposed;
FlatMapCompletableMainObserver(Observer super T> observer, Function super T, ? extends CompletableSource> mapper, boolean delayErrors) {
this.downstream = observer;
this.mapper = mapper;
this.delayErrors = delayErrors;
this.errors = new AtomicThrowable();
this.set = new CompositeDisposable();
this.lazySet(1);
}
@Override
public void onSubscribe(Disposable d) {
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
}
}
@Override
public void onNext(T value) {
CompletableSource cs;
try {
cs = Objects.requireNonNull(mapper.apply(value), "The mapper returned a null CompletableSource");
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
upstream.dispose();
onError(ex);
return;
}
getAndIncrement();
InnerObserver inner = new InnerObserver();
if (!disposed && set.add(inner)) {
cs.subscribe(inner);
}
}
@Override
public void onError(Throwable e) {
if (errors.tryAddThrowableOrReport(e)) {
if (delayErrors) {
if (decrementAndGet() == 0) {
errors.tryTerminateConsumer(downstream);
}
} else {
disposed = true;
upstream.dispose();
set.dispose();
errors.tryTerminateConsumer(downstream);
}
}
}
@Override
public void onComplete() {
if (decrementAndGet() == 0) {
errors.tryTerminateConsumer(downstream);
}
}
@Override
public void dispose() {
disposed = true;
upstream.dispose();
set.dispose();
errors.tryTerminateAndReport();
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
@Nullable
@Override
public T poll() {
return null; // always empty
}
@Override
public boolean isEmpty() {
return true; // always empty
}
@Override
public void clear() {
// nothing to clear
}
@Override
public int requestFusion(int mode) {
return mode & ASYNC;
}
void innerComplete(InnerObserver inner) {
set.delete(inner);
onComplete();
}
void innerError(InnerObserver inner, Throwable e) {
set.delete(inner);
onError(e);
}
final class InnerObserver extends AtomicReference implements CompletableObserver, Disposable {
private static final long serialVersionUID = 8606673141535671828L;
@Override
public void onSubscribe(Disposable d) {
DisposableHelper.setOnce(this, d);
}
@Override
public void onComplete() {
innerComplete(this);
}
@Override
public void onError(Throwable e) {
innerError(this, e);
}
@Override
public void dispose() {
DisposableHelper.dispose(this);
}
@Override
public boolean isDisposed() {
return DisposableHelper.isDisposed(get());
}
}
}
}
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