/**
* Copyright 2014 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 rx.internal.operators;
import java.util.concurrent.atomic.AtomicLong;
import rx.Observable.Operator;
import rx.Producer;
import rx.Subscriber;
public class OperatorOnBackpressureDrop<T> implements Operator<T, T> {
@Override
public Subscriber<? super T> call(final Subscriber<? super T> child) {
final AtomicLong requested = new AtomicLong();
child.setProducer(new Producer() {
@Override
public void request(long n) {
requested.getAndAdd(n);
}
});
return new Subscriber<T>(child) {
@Override
public void onCompleted() {
child.onCompleted();
}
@Override
public void onError(Throwable e) {
child.onError(e);
}
@Override
public void onNext(T t) {
if (requested.get() > 0) {
child.onNext(t);
requested.decrementAndGet();
}
}
};
}
}