/**
* 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.observable;
import java.util.concurrent.
TimeUnit;
import java.util.concurrent.atomic.*;
import io.reactivex.*;
import io.reactivex.
Scheduler.
Worker;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.*;
import io.reactivex.observers.
SerializedObserver;
import io.reactivex.plugins.
RxJavaPlugins;
public final class
ObservableDebounceTimed<T> extends
AbstractObservableWithUpstream<T, T> {
final long
timeout;
final
TimeUnit unit;
final
Scheduler scheduler;
public
ObservableDebounceTimed(
ObservableSource<T>
source, long
timeout,
TimeUnit unit,
Scheduler scheduler) {
super(
source);
this.
timeout =
timeout;
this.
unit =
unit;
this.
scheduler =
scheduler;
}
@
Override
public void
subscribeActual(
Observer<? super T>
t) {
source.
subscribe(new
DebounceTimedObserver<T>(
new
SerializedObserver<T>(
t),
timeout,
unit,
scheduler.
createWorker()));
}
static final class
DebounceTimedObserver<T>
implements
Observer<T>,
Disposable {
final
Observer<? super T>
downstream;
final long
timeout;
final
TimeUnit unit;
final
Scheduler.
Worker worker;
Disposable upstream;
Disposable timer;
volatile long
index;
boolean
done;
DebounceTimedObserver(
Observer<? super T>
actual, long
timeout,
TimeUnit unit,
Worker worker) {
this.
downstream =
actual;
this.
timeout =
timeout;
this.
unit =
unit;
this.
worker =
worker;
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
validate(this.
upstream,
d)) {
this.
upstream =
d;
downstream.
onSubscribe(this);
}
}
@
Override
public void
onNext(T
t) {
if (
done) {
return;
}
long
idx =
index + 1;
index =
idx;
Disposable d =
timer;
if (
d != null) {
d.
dispose();
}
DebounceEmitter<T>
de = new
DebounceEmitter<T>(
t,
idx, this);
timer =
de;
d =
worker.
schedule(
de,
timeout,
unit);
de.
setResource(
d);
}
@
Override
public void
onError(
Throwable t) {
if (
done) {
RxJavaPlugins.
onError(
t);
return;
}
Disposable d =
timer;
if (
d != null) {
d.
dispose();
}
done = true;
downstream.
onError(
t);
worker.
dispose();
}
@
Override
public void
onComplete() {
if (
done) {
return;
}
done = true;
Disposable d =
timer;
if (
d != null) {
d.
dispose();
}
@
SuppressWarnings("unchecked")
DebounceEmitter<T>
de = (
DebounceEmitter<T>)
d;
if (
de != null) {
de.
run();
}
downstream.
onComplete();
worker.
dispose();
}
@
Override
public void
dispose() {
upstream.
dispose();
worker.
dispose();
}
@
Override
public boolean
isDisposed() {
return
worker.
isDisposed();
}
void
emit(long
idx, T
t,
DebounceEmitter<T>
emitter) {
if (
idx ==
index) {
downstream.
onNext(
t);
emitter.
dispose();
}
}
}
static final class
DebounceEmitter<T> extends
AtomicReference<
Disposable> implements
Runnable,
Disposable {
private static final long
serialVersionUID = 6812032969491025141L;
final T
value;
final long
idx;
final
DebounceTimedObserver<T>
parent;
final
AtomicBoolean once = new
AtomicBoolean();
DebounceEmitter(T
value, long
idx,
DebounceTimedObserver<T>
parent) {
this.
value =
value;
this.
idx =
idx;
this.
parent =
parent;
}
@
Override
public void
run() {
if (
once.
compareAndSet(false, true)) {
parent.
emit(
idx,
value, this);
}
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
}
@
Override
public boolean
isDisposed() {
return
get() ==
DisposableHelper.
DISPOSED;
}
public void
setResource(
Disposable d) {
DisposableHelper.
replace(this,
d);
}
}
}