com.hotels.styx.api.FlowControlDisableOperator Maven / Gradle / Ivy
/*
Copyright (C) 2013-2018 Expedia 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 com.hotels.styx.api;
import io.netty.util.ReferenceCountUtil;
import rx.Observable;
import rx.Subscriber;
/**
* Requests as many event from upstream as possible (i.e. disables backpressure).
*
* @param event type
*/
public final class FlowControlDisableOperator implements Observable.Operator {
public static FlowControlDisableOperator disableFlowControl() {
return new FlowControlDisableOperator();
}
private FlowControlDisableOperator() {
}
@Override
public Subscriber call(Subscriber downstream) {
return new Subscriber() {
@Override
public void onStart() {
request(1);
}
@Override
public void onCompleted() {
downstream.onCompleted();
}
@Override
public void onError(Throwable e) {
downstream.onError(e);
}
@Override
public void onNext(E e) {
if (downstream.isUnsubscribed()) {
ReferenceCountUtil.release(e);
} else {
downstream.onNext(e);
}
request(1);
}
};
}
}