/**
* 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.maybe;
import java.util.concurrent.
TimeoutException;
import java.util.concurrent.atomic.
AtomicReference;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.
DisposableHelper;
import io.reactivex.internal.subscriptions.
SubscriptionHelper;
import io.reactivex.plugins.
RxJavaPlugins;
/**
* Switches to the fallback Maybe if the other Publisher signals a success or completes, or
* signals TimeoutException if fallback is null.
*
* @param <T> the main value type
* @param <U> the other value type
*/
public final class
MaybeTimeoutPublisher<T, U> extends
AbstractMaybeWithUpstream<T, T> {
final
Publisher<U>
other;
final
MaybeSource<? extends T>
fallback;
public
MaybeTimeoutPublisher(
MaybeSource<T>
source,
Publisher<U>
other,
MaybeSource<? extends T>
fallback) {
super(
source);
this.
other =
other;
this.
fallback =
fallback;
}
@
Override
protected void
subscribeActual(
MaybeObserver<? super T>
observer) {
TimeoutMainMaybeObserver<T, U>
parent = new
TimeoutMainMaybeObserver<T, U>(
observer,
fallback);
observer.
onSubscribe(
parent);
other.
subscribe(
parent.
other);
source.
subscribe(
parent);
}
static final class
TimeoutMainMaybeObserver<T, U>
extends
AtomicReference<
Disposable>
implements
MaybeObserver<T>,
Disposable {
private static final long
serialVersionUID = -5955289211445418871L;
final
MaybeObserver<? super T>
downstream;
final
TimeoutOtherMaybeObserver<T, U>
other;
final
MaybeSource<? extends T>
fallback;
final
TimeoutFallbackMaybeObserver<T>
otherObserver;
TimeoutMainMaybeObserver(
MaybeObserver<? super T>
actual,
MaybeSource<? extends T>
fallback) {
this.
downstream =
actual;
this.
other = new
TimeoutOtherMaybeObserver<T, U>(this);
this.
fallback =
fallback;
this.
otherObserver =
fallback != null ? new
TimeoutFallbackMaybeObserver<T>(
actual) : null;
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
SubscriptionHelper.
cancel(
other);
TimeoutFallbackMaybeObserver<T>
oo =
otherObserver;
if (
oo != null) {
DisposableHelper.
dispose(
oo);
}
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
@
Override
public void
onSubscribe(
Disposable d) {
DisposableHelper.
setOnce(this,
d);
}
@
Override
public void
onSuccess(T
value) {
SubscriptionHelper.
cancel(
other);
if (
getAndSet(
DisposableHelper.
DISPOSED) !=
DisposableHelper.
DISPOSED) {
downstream.
onSuccess(
value);
}
}
@
Override
public void
onError(
Throwable e) {
SubscriptionHelper.
cancel(
other);
if (
getAndSet(
DisposableHelper.
DISPOSED) !=
DisposableHelper.
DISPOSED) {
downstream.
onError(
e);
} else {
RxJavaPlugins.
onError(
e);
}
}
@
Override
public void
onComplete() {
SubscriptionHelper.
cancel(
other);
if (
getAndSet(
DisposableHelper.
DISPOSED) !=
DisposableHelper.
DISPOSED) {
downstream.
onComplete();
}
}
public void
otherError(
Throwable e) {
if (
DisposableHelper.
dispose(this)) {
downstream.
onError(
e);
} else {
RxJavaPlugins.
onError(
e);
}
}
public void
otherComplete() {
if (
DisposableHelper.
dispose(this)) {
if (
fallback == null) {
downstream.
onError(new
TimeoutException());
} else {
fallback.
subscribe(
otherObserver);
}
}
}
}
static final class
TimeoutOtherMaybeObserver<T, U>
extends
AtomicReference<
Subscription>
implements
FlowableSubscriber<
Object> {
private static final long
serialVersionUID = 8663801314800248617L;
final
TimeoutMainMaybeObserver<T, U>
parent;
TimeoutOtherMaybeObserver(
TimeoutMainMaybeObserver<T, U>
parent) {
this.
parent =
parent;
}
@
Override
public void
onSubscribe(
Subscription s) {
SubscriptionHelper.
setOnce(this,
s,
Long.
MAX_VALUE);
}
@
Override
public void
onNext(
Object value) {
get().
cancel();
parent.
otherComplete();
}
@
Override
public void
onError(
Throwable e) {
parent.
otherError(
e);
}
@
Override
public void
onComplete() {
parent.
otherComplete();
}
}
static final class
TimeoutFallbackMaybeObserver<T>
extends
AtomicReference<
Disposable>
implements
MaybeObserver<T> {
private static final long
serialVersionUID = 8663801314800248617L;
final
MaybeObserver<? super T>
downstream;
TimeoutFallbackMaybeObserver(
MaybeObserver<? super T>
downstream) {
this.
downstream =
downstream;
}
@
Override
public void
onSubscribe(
Disposable d) {
DisposableHelper.
setOnce(this,
d);
}
@
Override
public void
onSuccess(T
value) {
downstream.
onSuccess(
value);
}
@
Override
public void
onError(
Throwable e) {
downstream.
onError(
e);
}
@
Override
public void
onComplete() {
downstream.
onComplete();
}
}
}