reactor.rx.stream.DeferredStream Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2015 Pivotal Software Inc., Inc. All Rights Reserved.
*
* 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 reactor.rx.stream;
import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;
import reactor.core.support.Exceptions;
import reactor.fn.Supplier;
import reactor.rx.Stream;
/**
* A {@link org.reactivestreams.Publisher} supplier that will call the passed supplier on each subscribe call.
*
* Create such stream with the provided factory, E.g.:
*
* {@code
* Streams.defer(() -> Streams.just(random.nextInt()))
* }
*
*
* @author Stephane Maldini
*/
public class DeferredStream extends Stream {
private final Supplier> sourceFactory;
public DeferredStream(Supplier> sourceFactory) {
this.sourceFactory = sourceFactory;
}
@Override
public void subscribe(final Subscriber subscriber) {
try{
sourceFactory.get().subscribe(subscriber);
}catch (Throwable throwable){
Exceptions.throwIfFatal(throwable);
subscriber.onError(throwable);
}
}
}