/**
* 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.internal.operators.single;
import java.util.concurrent.
CancellationException;
import java.util.concurrent.atomic.
AtomicReference;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.*;
import io.reactivex.internal.subscriptions.
SubscriptionHelper;
import io.reactivex.plugins.
RxJavaPlugins;
/**
* Signals the events of the source Single or signals a CancellationException if the
* other Publisher signalled first.
* @param <T> the main value type
* @param <U> the other value type
*/
public final class
SingleTakeUntil<T, U> extends
Single<T> {
final
SingleSource<T>
source;
final
Publisher<U>
other;
public
SingleTakeUntil(
SingleSource<T>
source,
Publisher<U>
other) {
this.
source =
source;
this.
other =
other;
}
@
Override
protected void
subscribeActual(
SingleObserver<? super T>
observer) {
TakeUntilMainObserver<T>
parent = new
TakeUntilMainObserver<T>(
observer);
observer.
onSubscribe(
parent);
other.
subscribe(
parent.
other);
source.
subscribe(
parent);
}
static final class
TakeUntilMainObserver<T>
extends
AtomicReference<
Disposable>
implements
SingleObserver<T>,
Disposable {
private static final long
serialVersionUID = -622603812305745221L;
final
SingleObserver<? super T>
downstream;
final
TakeUntilOtherSubscriber other;
TakeUntilMainObserver(
SingleObserver<? super T>
downstream) {
this.
downstream =
downstream;
this.
other = new
TakeUntilOtherSubscriber(this);
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
other.
dispose();
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
@
Override
public void
onSubscribe(
Disposable d) {
DisposableHelper.
setOnce(this,
d);
}
@
Override
public void
onSuccess(T
value) {
other.
dispose();
Disposable a =
getAndSet(
DisposableHelper.
DISPOSED);
if (
a !=
DisposableHelper.
DISPOSED) {
downstream.
onSuccess(
value);
}
}
@
Override
public void
onError(
Throwable e) {
other.
dispose();
Disposable a =
get();
if (
a !=
DisposableHelper.
DISPOSED) {
a =
getAndSet(
DisposableHelper.
DISPOSED);
if (
a !=
DisposableHelper.
DISPOSED) {
downstream.
onError(
e);
return;
}
}
RxJavaPlugins.
onError(
e);
}
void
otherError(
Throwable e) {
Disposable a =
get();
if (
a !=
DisposableHelper.
DISPOSED) {
a =
getAndSet(
DisposableHelper.
DISPOSED);
if (
a !=
DisposableHelper.
DISPOSED) {
if (
a != null) {
a.
dispose();
}
downstream.
onError(
e);
return;
}
}
RxJavaPlugins.
onError(
e);
}
}
static final class
TakeUntilOtherSubscriber
extends
AtomicReference<
Subscription>
implements
FlowableSubscriber<
Object> {
private static final long
serialVersionUID = 5170026210238877381L;
final
TakeUntilMainObserver<?>
parent;
TakeUntilOtherSubscriber(
TakeUntilMainObserver<?>
parent) {
this.
parent =
parent;
}
@
Override
public void
onSubscribe(
Subscription s) {
SubscriptionHelper.
setOnce(this,
s,
Long.
MAX_VALUE);
}
@
Override
public void
onNext(
Object t) {
if (
SubscriptionHelper.
cancel(this)) {
parent.
otherError(new
CancellationException());
}
}
@
Override
public void
onError(
Throwable t) {
parent.
otherError(
t);
}
@
Override
public void
onComplete() {
if (
get() !=
SubscriptionHelper.
CANCELLED) {
lazySet(
SubscriptionHelper.
CANCELLED);
parent.
otherError(new
CancellationException());
}
}
public void
dispose() {
SubscriptionHelper.
cancel(this);
}
}
}