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    • io.reactivex.rxjava3.internal.subscribers.BlockingSubscriber 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.subscribers;

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

import org.reactivestreams.Subscription;

import io.reactivex.rxjava3.core.FlowableSubscriber;
import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
import io.reactivex.rxjava3.internal.util.NotificationLite;

public final class BlockingSubscriber extends AtomicReference implements FlowableSubscriber, Subscription {

    private static final long serialVersionUID = -4875965440900746268L;

    public static final Object TERMINATED = new Object();

    final Queue queue;

    public BlockingSubscriber(Queue queue) {
        this.queue = queue;
    }

    @Override
    public void onSubscribe(Subscription s) {
        if (SubscriptionHelper.setOnce(this, s)) {
            queue.offer(NotificationLite.subscription(this));
        }
    }

    @Override
    public void onNext(T t) {
        queue.offer(NotificationLite.next(t));
    }

    @Override
    public void onError(Throwable t) {
        queue.offer(NotificationLite.error(t));
    }

    @Override
    public void onComplete() {
        queue.offer(NotificationLite.complete());
    }

    @Override
    public void request(long n) {
        get().request(n);
    }

    @Override
    public void cancel() {
        if (SubscriptionHelper.cancel(this)) {
            queue.offer(TERMINATED);
        }
    }

    public boolean isCancelled() {
        return get() == SubscriptionHelper.CANCELLED;
    }
}
    
    
    
    

    




    
    
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