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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.single;
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.functions.*;
import io.reactivex.rxjava3.internal.disposables.*;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
/**
* Invokes callbacks upon {@code onSubscribe} from upstream and
* {@code dispose} from downstream.
*
* @param the element type of the flow
* @since 3.0.0
*/
public final class SingleDoOnLifecycle extends Single {
final Single source;
final Consumer super Disposable> onSubscribe;
final Action onDispose;
public SingleDoOnLifecycle(Single upstream, Consumer super Disposable> onSubscribe,
Action onDispose) {
this.source = upstream;
this.onSubscribe = onSubscribe;
this.onDispose = onDispose;
}
@Override
protected void subscribeActual(SingleObserver super T> observer) {
source.subscribe(new SingleLifecycleObserver<>(observer, onSubscribe, onDispose));
}
static final class SingleLifecycleObserver implements SingleObserver, Disposable {
final SingleObserver super T> downstream;
final Consumer super Disposable> onSubscribe;
final Action onDispose;
Disposable upstream;
SingleLifecycleObserver(SingleObserver super T> downstream, Consumer super Disposable> onSubscribe, Action onDispose) {
this.downstream = downstream;
this.onSubscribe = onSubscribe;
this.onDispose = onDispose;
}
@Override
public void onSubscribe(@NonNull Disposable d) {
// this way, multiple calls to onSubscribe can show up in tests that use doOnSubscribe to validate behavior
try {
onSubscribe.accept(d);
} catch (Throwable e) {
Exceptions.throwIfFatal(e);
d.dispose();
this.upstream = DisposableHelper.DISPOSED;
EmptyDisposable.error(e, downstream);
return;
}
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
}
}
@Override
public void onSuccess(@NonNull T t) {
if (upstream != DisposableHelper.DISPOSED) {
upstream = DisposableHelper.DISPOSED;
downstream.onSuccess(t);
}
}
@Override
public void onError(@NonNull Throwable e) {
if (upstream != DisposableHelper.DISPOSED) {
upstream = DisposableHelper.DISPOSED;
downstream.onError(e);
} else {
RxJavaPlugins.onError(e);
}
}
@Override
public void dispose() {
try {
onDispose.run();
} catch (Throwable e) {
Exceptions.throwIfFatal(e);
RxJavaPlugins.onError(e);
}
upstream.dispose();
upstream = DisposableHelper.DISPOSED;
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
}
}
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