/**
* 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.atomic.
AtomicReference;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.*;
/**
* Subscribes to the upstream MaybeSource on the specified scheduler.
*
* @param <T> the value type delivered
*/
public final class
MaybeSubscribeOn<T> extends
AbstractMaybeWithUpstream<T, T> {
final
Scheduler scheduler;
public
MaybeSubscribeOn(
MaybeSource<T>
source,
Scheduler scheduler) {
super(
source);
this.
scheduler =
scheduler;
}
@
Override
protected void
subscribeActual(
MaybeObserver<? super T>
observer) {
SubscribeOnMaybeObserver<T>
parent = new
SubscribeOnMaybeObserver<T>(
observer);
observer.
onSubscribe(
parent);
parent.
task.
replace(
scheduler.
scheduleDirect(new
SubscribeTask<T>(
parent,
source)));
}
static final class
SubscribeTask<T> implements
Runnable {
final
MaybeObserver<? super T>
observer;
final
MaybeSource<T>
source;
SubscribeTask(
MaybeObserver<? super T>
observer,
MaybeSource<T>
source) {
this.
observer =
observer;
this.
source =
source;
}
@
Override
public void
run() {
source.
subscribe(
observer);
}
}
static final class
SubscribeOnMaybeObserver<T>
extends
AtomicReference<
Disposable>
implements
MaybeObserver<T>,
Disposable {
final
SequentialDisposable task;
private static final long
serialVersionUID = 8571289934935992137L;
final
MaybeObserver<? super T>
downstream;
SubscribeOnMaybeObserver(
MaybeObserver<? super T>
downstream) {
this.
downstream =
downstream;
this.
task = new
SequentialDisposable();
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
task.
dispose();
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
@
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();
}
}
}