/**
* 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.mixed;
import java.util.concurrent.atomic.*;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.
DisposableHelper;
import io.reactivex.internal.subscriptions.
SubscriptionHelper;
/**
* After Completable completes, it relays the signals
* of the Publisher to the downstream subscriber.
*
* @param <R> the result type of the Publisher and this operator
* @since 2.1.15
*/
public final class
CompletableAndThenPublisher<R> extends
Flowable<R> {
final
CompletableSource source;
final
Publisher<? extends R>
other;
public
CompletableAndThenPublisher(
CompletableSource source,
Publisher<? extends R>
other) {
this.
source =
source;
this.
other =
other;
}
@
Override
protected void
subscribeActual(
Subscriber<? super R>
s) {
source.
subscribe(new
AndThenPublisherSubscriber<R>(
s,
other));
}
static final class
AndThenPublisherSubscriber<R>
extends
AtomicReference<
Subscription>
implements
FlowableSubscriber<R>,
CompletableObserver,
Subscription {
private static final long
serialVersionUID = -8948264376121066672L;
final
Subscriber<? super R>
downstream;
Publisher<? extends R>
other;
Disposable upstream;
final
AtomicLong requested;
AndThenPublisherSubscriber(
Subscriber<? super R>
downstream,
Publisher<? extends R>
other) {
this.
downstream =
downstream;
this.
other =
other;
this.
requested = new
AtomicLong();
}
@
Override
public void
onNext(R
t) {
downstream.
onNext(
t);
}
@
Override
public void
onError(
Throwable t) {
downstream.
onError(
t);
}
@
Override
public void
onComplete() {
Publisher<? extends R>
p =
other;
if (
p == null) {
downstream.
onComplete();
} else {
other = null;
p.
subscribe(this);
}
}
@
Override
public void
request(long
n) {
SubscriptionHelper.
deferredRequest(this,
requested,
n);
}
@
Override
public void
cancel() {
upstream.
dispose();
SubscriptionHelper.
cancel(this);
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
validate(
upstream,
d)) {
this.
upstream =
d;
downstream.
onSubscribe(this);
}
}
@
Override
public void
onSubscribe(
Subscription s) {
SubscriptionHelper.
deferredSetOnce(this,
requested,
s);
}
}
}