/**
* 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.flowable;
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.exceptions.Exceptions;
import io.reactivex.functions.Function;
import io.reactivex.internal.disposables.DisposableHelper;
import io.reactivex.internal.functions.ObjectHelper;
import io.reactivex.internal.subscribers.FullArbiterSubscriber;
import io.reactivex.internal.subscriptions.*;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.subscribers.*;
public final class FlowableTimeout<T, U, V> extends AbstractFlowableWithUpstream<T, T> {
final Publisher<U> firstTimeoutIndicator;
final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
final Publisher<? extends T> other;
public FlowableTimeout(
Flowable<T> source,
Publisher<U> firstTimeoutIndicator,
Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator,
Publisher<? extends T> other) {
super(source);
this.firstTimeoutIndicator = firstTimeoutIndicator;
this.itemTimeoutIndicator = itemTimeoutIndicator;
this.other = other;
}
@Override
protected void subscribeActual(Subscriber<? super T> s) {
if (other == null) {
source.subscribe(new TimeoutSubscriber<T, U, V>(
new SerializedSubscriber<T>(s),
firstTimeoutIndicator, itemTimeoutIndicator));
} else {
source.subscribe(new TimeoutOtherSubscriber<T, U, V>(
s, firstTimeoutIndicator, itemTimeoutIndicator, other));
}
}
static final class TimeoutSubscriber<T, U, V> implements FlowableSubscriber<T>, Subscription, OnTimeout {
final Subscriber<? super T> actual;
final Publisher<U> firstTimeoutIndicator;
final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
Subscription s;
volatile boolean cancelled;
volatile long index;
final AtomicReference<Disposable> timeout = new AtomicReference<Disposable>();
TimeoutSubscriber(Subscriber<? super T> actual,
Publisher<U> firstTimeoutIndicator,
Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator) {
this.actual = actual;
this.firstTimeoutIndicator = firstTimeoutIndicator;
this.itemTimeoutIndicator = itemTimeoutIndicator;
}
@Override
public void onSubscribe(Subscription s) {
if (!SubscriptionHelper.validate(this.s, s)) {
return;
}
this.s = s;
if (cancelled) {
return;
}
Subscriber<? super T> a = actual;
Publisher<U> p = firstTimeoutIndicator;
if (p != null) {
TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, 0);
if (timeout.compareAndSet(null, tis)) {
a.onSubscribe(this);
p.subscribe(tis);
}
} else {
a.onSubscribe(this);
}
}
@Override
public void onNext(T t) {
long idx = index + 1;
index = idx;
actual.onNext(t);
Disposable d = timeout.get();
if (d != null) {
d.dispose();
}
Publisher<V> p;
try {
p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The publisher returned is null");
} catch (Throwable e) {
Exceptions.throwIfFatal(e);
cancel();
actual.onError(e);
return;
}
TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, idx);
if (timeout.compareAndSet(d, tis)) {
p.subscribe(tis);
}
}
@Override
public void onError(Throwable t) {
cancel();
actual.onError(t);
}
@Override
public void onComplete() {
cancel();
actual.onComplete();
}
@Override
public void request(long n) {
s.request(n);
}
@Override
public void cancel() {
cancelled = true;
s.cancel();
DisposableHelper.dispose(timeout);
}
@Override
public void timeout(long idx) {
if (idx == index) {
cancel();
actual.onError(new TimeoutException());
}
}
}
interface OnTimeout {
void timeout(long index);
void onError(Throwable e);
}
static final class TimeoutInnerSubscriber<T, U, V> extends DisposableSubscriber<Object> {
final OnTimeout parent;
final long index;
boolean done;
TimeoutInnerSubscriber(OnTimeout parent, final long index) {
this.parent = parent;
this.index = index;
}
@Override
public void onNext(Object t) {
if (done) {
return;
}
done = true;
cancel();
parent.timeout(index);
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
return;
}
done = true;
parent.onError(t);
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
parent.timeout(index);
}
}
static final class TimeoutOtherSubscriber<T, U, V> implements FlowableSubscriber<T>, Disposable, OnTimeout {
final Subscriber<? super T> actual;
final Publisher<U> firstTimeoutIndicator;
final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
final Publisher<? extends T> other;
final FullArbiter<T> arbiter;
Subscription s;
boolean done;
volatile boolean cancelled;
volatile long index;
final AtomicReference<Disposable> timeout = new AtomicReference<Disposable>();
TimeoutOtherSubscriber(Subscriber<? super T> actual,
Publisher<U> firstTimeoutIndicator,
Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator, Publisher<? extends T> other) {
this.actual = actual;
this.firstTimeoutIndicator = firstTimeoutIndicator;
this.itemTimeoutIndicator = itemTimeoutIndicator;
this.other = other;
this.arbiter = new FullArbiter<T>(actual, this, 8);
}
@Override
public void onSubscribe(Subscription s) {
if (!SubscriptionHelper.validate(this.s, s)) {
return;
}
this.s = s;
if (!arbiter.setSubscription(s)) {
return;
}
Subscriber<? super T> a = actual;
Publisher<U> p = firstTimeoutIndicator;
if (p != null) {
TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, 0);
if (timeout.compareAndSet(null, tis)) {
a.onSubscribe(arbiter);
p.subscribe(tis);
}
} else {
a.onSubscribe(arbiter);
}
}
@Override
public void onNext(T t) {
if (done) {
return;
}
long idx = index + 1;
index = idx;
if (!arbiter.onNext(t, s)) {
return;
}
Disposable d = timeout.get();
if (d != null) {
d.dispose();
}
Publisher<V> p;
try {
p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The publisher returned is null");
} catch (Throwable e) {
Exceptions.throwIfFatal(e);
actual.onError(e);
return;
}
TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, idx);
if (timeout.compareAndSet(d, tis)) {
p.subscribe(tis);
}
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
return;
}
done = true;
dispose();
arbiter.onError(t, s);
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
dispose();
arbiter.onComplete(s);
}
@Override
public void dispose() {
cancelled = true;
s.cancel();
DisposableHelper.dispose(timeout);
}
@Override
public boolean isDisposed() {
return cancelled;
}
@Override
public void timeout(long idx) {
if (idx == index) {
dispose();
other.subscribe(new FullArbiterSubscriber<T>(arbiter));
}
}
}
}