hu.akarnokd.rxjava2.internal.subscribers.SubscriptionLambdaSubscriber Maven / Gradle / Ivy

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/**
 * Copyright 2015 David Karnok and Netflix, Inc.
 * 
 * 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 hu.akarnokd.rxjava2.internal.subscribers;

import org.reactivestreams.*;

import hu.akarnokd.rxjava2.functions.*;
import hu.akarnokd.rxjava2.internal.subscriptions.*;
import hu.akarnokd.rxjava2.plugins.RxJavaPlugins;

public final class SubscriptionLambdaSubscriber implements Subscriber, Subscription {
    final Subscriber actual;
    final Consumer onSubscribe;
    final LongConsumer onRequest;
    final Runnable onCancel;
    
    Subscription s;
    
    public SubscriptionLambdaSubscriber(Subscriber actual, 
            Consumer onSubscribe,
            LongConsumer onRequest,
            Runnable onCancel) {
        this.actual = actual;
        this.onSubscribe = onSubscribe;
        this.onCancel = onCancel;
        this.onRequest = onRequest;
    }

    @Override
    public void onSubscribe(Subscription s) {
        // this way, multiple calls to onSubscribe can show up in tests that use doOnSubscribe to validate behavior
        try {
            onSubscribe.accept(s);
        } catch (Throwable e) {
            s.cancel();
            RxJavaPlugins.onError(e);
            EmptySubscription.error(e, actual);
            return;
        }
        if (SubscriptionHelper.validateSubscription(this.s, s)) {
            return;
        }
        this.s = s;
        actual.onSubscribe(this);
    }
    
    @Override
    public void onNext(T t) {
        actual.onNext(t);
    }
    
    @Override
    public void onError(Throwable t) {
        actual.onError(t);
    }
    
    @Override
    public void onComplete() {
        actual.onComplete();
    }
    
    @Override
    public void request(long n) {
        try {
            onRequest.accept(n);
        } catch (Throwable e) {
            RxJavaPlugins.onError(e);
        }
        s.request(n);
    }
    
    @Override
    public void cancel() {
        try {
            onCancel.run();
        } catch (Throwable e) {
            RxJavaPlugins.onError(e);
        }
        s.cancel();
    }
}