/**
* 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.atomic.
AtomicReference;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.
DisposableHelper;
public final class
SingleObserveOn<T> extends
Single<T> {
final
SingleSource<T>
source;
final
Scheduler scheduler;
public
SingleObserveOn(
SingleSource<T>
source,
Scheduler scheduler) {
this.
source =
source;
this.
scheduler =
scheduler;
}
@
Override
protected void
subscribeActual(final
SingleObserver<? super T>
observer) {
source.
subscribe(new
ObserveOnSingleObserver<T>(
observer,
scheduler));
}
static final class
ObserveOnSingleObserver<T> extends
AtomicReference<
Disposable>
implements
SingleObserver<T>,
Disposable,
Runnable {
private static final long
serialVersionUID = 3528003840217436037L;
final
SingleObserver<? super T>
downstream;
final
Scheduler scheduler;
T
value;
Throwable error;
ObserveOnSingleObserver(
SingleObserver<? super T>
actual,
Scheduler scheduler) {
this.
downstream =
actual;
this.
scheduler =
scheduler;
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
setOnce(this,
d)) {
downstream.
onSubscribe(this);
}
}
@
Override
public void
onSuccess(T
value) {
this.
value =
value;
Disposable d =
scheduler.
scheduleDirect(this);
DisposableHelper.
replace(this,
d);
}
@
Override
public void
onError(
Throwable e) {
this.
error =
e;
Disposable d =
scheduler.
scheduleDirect(this);
DisposableHelper.
replace(this,
d);
}
@
Override
public void
run() {
Throwable ex =
error;
if (
ex != null) {
downstream.
onError(
ex);
} else {
downstream.
onSuccess(
value);
}
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
}
}