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The core HTTP and composition mechanisms of Ratpack
/*
* Copyright 2014 the original author or authors.
*
* 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 ratpack.stream.internal;
import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import java.util.Collection;
import java.util.concurrent.atomic.AtomicBoolean;
public class FanOutPublisher implements Publisher {
private final Publisher> upstreamIterablePublisher;
public FanOutPublisher(Publisher> publisher) {
this.upstreamIterablePublisher = publisher;
}
@Override
public void subscribe(final Subscriber subscriber) {
upstreamIterablePublisher.subscribe(new Subscriber>() {
private Subscription subscription;
private final AtomicBoolean done = new AtomicBoolean();
@Override
public void onSubscribe(Subscription s) {
this.subscription = s;
subscriber.onSubscribe(this.subscription);
}
@Override
public void onNext(Iterable iterable) {
for (T element: iterable) {
subscriber.onNext(element);
}
}
@Override
public void onError(Throwable t) {
if (done.compareAndSet(false, true)) {
subscriber.onError(t);
}
}
@Override
public void onComplete() {
if (done.compareAndSet(false, true)) {
subscriber.onComplete();
}
}
});
}
}