io.reactivex.rxjava3.internal.operators.flowable.FlowableConcatWithCompletable Maven / Gradle / Ivy
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/*
* 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.rxjava3.internal.operators.flowable;
import java.util.concurrent.atomic.AtomicReference;
import org.reactivestreams.*;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
/**
* Subscribe to a main Flowable first, then when it completes normally, subscribe to a Completable
* and terminate when it terminates.
* History: 2.1.10 - experimental
* @param the element type of the main source and output type
* @since 2.2
*/
public final class FlowableConcatWithCompletable extends AbstractFlowableWithUpstream {
final CompletableSource other;
public FlowableConcatWithCompletable(Flowable source, CompletableSource other) {
super(source);
this.other = other;
}
@Override
protected void subscribeActual(Subscriber super T> s) {
source.subscribe(new ConcatWithSubscriber<>(s, other));
}
static final class ConcatWithSubscriber
extends AtomicReference
implements FlowableSubscriber, CompletableObserver, Subscription {
private static final long serialVersionUID = -7346385463600070225L;
final Subscriber super T> downstream;
Subscription upstream;
CompletableSource other;
boolean inCompletable;
ConcatWithSubscriber(Subscriber super T> actual, CompletableSource other) {
this.downstream = actual;
this.other = other;
}
@Override
public void onSubscribe(Subscription s) {
if (SubscriptionHelper.validate(upstream, s)) {
this.upstream = s;
downstream.onSubscribe(this);
}
}
@Override
public void onSubscribe(Disposable d) {
DisposableHelper.setOnce(this, d);
}
@Override
public void onNext(T t) {
downstream.onNext(t);
}
@Override
public void onError(Throwable t) {
downstream.onError(t);
}
@Override
public void onComplete() {
if (inCompletable) {
downstream.onComplete();
} else {
inCompletable = true;
upstream = SubscriptionHelper.CANCELLED;
CompletableSource cs = other;
other = null;
cs.subscribe(this);
}
}
@Override
public void request(long n) {
upstream.request(n);
}
@Override
public void cancel() {
upstream.cancel();
DisposableHelper.dispose(this);
}
}
}