/**
* 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.*;
import java.util.concurrent.atomic.
AtomicReference;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.
DisposableHelper;
import io.reactivex.plugins.
RxJavaPlugins;
public final class
SingleTimeout<T> extends
Single<T> {
final
SingleSource<T>
source;
final long
timeout;
final
TimeUnit unit;
final
Scheduler scheduler;
final
SingleSource<? extends T>
other;
public
SingleTimeout(
SingleSource<T>
source, long
timeout,
TimeUnit unit,
Scheduler scheduler,
SingleSource<? extends T>
other) {
this.
source =
source;
this.
timeout =
timeout;
this.
unit =
unit;
this.
scheduler =
scheduler;
this.
other =
other;
}
@
Override
protected void
subscribeActual(final
SingleObserver<? super T>
observer) {
TimeoutMainObserver<T>
parent = new
TimeoutMainObserver<T>(
observer,
other);
observer.
onSubscribe(
parent);
DisposableHelper.
replace(
parent.
task,
scheduler.
scheduleDirect(
parent,
timeout,
unit));
source.
subscribe(
parent);
}
static final class
TimeoutMainObserver<T> extends
AtomicReference<
Disposable>
implements
SingleObserver<T>,
Runnable,
Disposable {
private static final long
serialVersionUID = 37497744973048446L;
final
SingleObserver<? super T>
downstream;
final
AtomicReference<
Disposable>
task;
final
TimeoutFallbackObserver<T>
fallback;
SingleSource<? extends T>
other;
static final class
TimeoutFallbackObserver<T> extends
AtomicReference<
Disposable>
implements
SingleObserver<T> {
private static final long
serialVersionUID = 2071387740092105509L;
final
SingleObserver<? super T>
downstream;
TimeoutFallbackObserver(
SingleObserver<? super T>
downstream) {
this.
downstream =
downstream;
}
@
Override
public void
onSubscribe(
Disposable d) {
DisposableHelper.
setOnce(this,
d);
}
@
Override
public void
onSuccess(T
t) {
downstream.
onSuccess(
t);
}
@
Override
public void
onError(
Throwable e) {
downstream.
onError(
e);
}
}
TimeoutMainObserver(
SingleObserver<? super T>
actual,
SingleSource<? extends T>
other) {
this.
downstream =
actual;
this.
other =
other;
this.
task = new
AtomicReference<
Disposable>();
if (
other != null) {
this.
fallback = new
TimeoutFallbackObserver<T>(
actual);
} else {
this.
fallback = null;
}
}
@
Override
public void
run() {
Disposable d =
get();
if (
d !=
DisposableHelper.
DISPOSED &&
compareAndSet(
d,
DisposableHelper.
DISPOSED)) {
if (
d != null) {
d.
dispose();
}
SingleSource<? extends T>
other = this.
other;
if (
other == null) {
downstream.
onError(new
TimeoutException());
} else {
this.
other = null;
other.
subscribe(
fallback);
}
}
}
@
Override
public void
onSubscribe(
Disposable d) {
DisposableHelper.
setOnce(this,
d);
}
@
Override
public void
onSuccess(T
t) {
Disposable d =
get();
if (
d !=
DisposableHelper.
DISPOSED &&
compareAndSet(
d,
DisposableHelper.
DISPOSED)) {
DisposableHelper.
dispose(
task);
downstream.
onSuccess(
t);
}
}
@
Override
public void
onError(
Throwable e) {
Disposable d =
get();
if (
d !=
DisposableHelper.
DISPOSED &&
compareAndSet(
d,
DisposableHelper.
DISPOSED)) {
DisposableHelper.
dispose(
task);
downstream.
onError(
e);
} else {
RxJavaPlugins.
onError(
e);
}
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
DisposableHelper.
dispose(
task);
if (
fallback != null) {
DisposableHelper.
dispose(
fallback);
}
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
}
}