io.reactivex.observable.internal.operators.SingleTakeUntil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of rxjava3-observable Show documentation
rxjava3-observable developed by David Karnok
The newest version!
/**
 * 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.observable.internal.operators;

import java.util.concurrent.CancellationException;
import java.util.concurrent.atomic.AtomicReference;

import io.reactivex.common.*;
import io.reactivex.common.internal.disposables.DisposableHelper;
import io.reactivex.observable.*;

/**
 * Signals the events of the source Single or signals a CancellationException if the
 * other Observable signalled first.
 * @param  the main value type
 * @param  the other value type
 */
public final class SingleTakeUntil extends Single {

    final SingleSource source;

    final ObservableSource other;

    public SingleTakeUntil(SingleSource source, ObservableSource other) {
        this.source = source;
        this.other = other;
    }

    @Override
    protected void subscribeActual(SingleObserver observer) {
        TakeUntilMainObserver parent = new TakeUntilMainObserver(observer);
        observer.onSubscribe(parent);

        other.subscribe(parent.other);

        source.subscribe(parent);
    }

    static final class TakeUntilMainObserver
    extends AtomicReference
    implements SingleObserver, Disposable {

        private static final long serialVersionUID = -622603812305745221L;

        final SingleObserver actual;

        final TakeUntilOtherObserver other;

        TakeUntilMainObserver(SingleObserver actual) {
            this.actual = actual;
            this.other = new TakeUntilOtherObserver(this);
        }

        @Override
        public void dispose() {
            DisposableHelper.dispose(this);
        }

        @Override
        public boolean isDisposed() {
            return DisposableHelper.isDisposed(get());
        }

        @Override
        public void onSubscribe(Disposable d) {
            DisposableHelper.setOnce(this, d);
        }

        @Override
        public void onSuccess(T value) {
            other.dispose();

            Disposable a = get();
            if (a != DisposableHelper.DISPOSED) {
                a = getAndSet(DisposableHelper.DISPOSED);
                if (a != DisposableHelper.DISPOSED) {
                    actual.onSuccess(value);
                }
            }
        }

        @Override
        public void onError(Throwable e) {
            other.dispose();

            Disposable a = get();
            if (a != DisposableHelper.DISPOSED) {
                a = getAndSet(DisposableHelper.DISPOSED);
                if (a != DisposableHelper.DISPOSED) {
                    actual.onError(e);
                    return;
                }
            }
            RxJavaCommonPlugins.onError(e);
        }

        void otherError(Throwable e) {
            Disposable a = get();
            if (a != DisposableHelper.DISPOSED) {
                a = getAndSet(DisposableHelper.DISPOSED);
                if (a != DisposableHelper.DISPOSED) {
                    if (a != null) {
                        a.dispose();
                    }
                    actual.onError(e);
                    return;
                }
            }
            RxJavaCommonPlugins.onError(e);
        }
    }

    static final class TakeUntilOtherObserver
    extends AtomicReference
    implements Observer