/*
* Copyright (c) 2011-2017 Pivotal Software 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.core.publisher;
import java.util.
Objects;
import java.util.function.
Function;
import org.reactivestreams.
Publisher;
import org.reactivestreams.
Subscriber;
import reactor.core.
CoreSubscriber;
/**
* Repeats a source when a companion sequence signals an item in response to the main's
* completion signal
* <p>
* <p>If the companion sequence signals when the main source is active, the repeat attempt
* is suppressed and any terminal signal will terminate the main source with the same
* signal immediately.
*
* @param <T> the source value type
*
* @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a>
*/
final class
MonoRepeatWhen<T> extends
FluxFromMonoOperator<T, T> {
final
Function<? super
Flux<
Long>, ? extends
Publisher<?>>
whenSourceFactory;
MonoRepeatWhen(
Mono<? extends T>
source,
Function<? super
Flux<
Long>, ? extends
Publisher<?>>
whenSourceFactory) {
super(
source);
this.
whenSourceFactory =
Objects.
requireNonNull(
whenSourceFactory, "whenSourceFactory");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
FluxRepeatWhen.
RepeatWhenOtherSubscriber other =
new
FluxRepeatWhen.
RepeatWhenOtherSubscriber();
Subscriber<
Long>
signaller =
Operators.
serialize(
other.
completionSignal);
signaller.
onSubscribe(
Operators.
emptySubscription());
CoreSubscriber<T>
serial =
Operators.
serialize(
actual);
FluxRepeatWhen.
RepeatWhenMainSubscriber<T>
main =
new
FluxRepeatWhen.
RepeatWhenMainSubscriber<>(
serial,
signaller,
source);
other.
main =
main;
serial.
onSubscribe(
main);
Publisher<?>
p;
try {
p =
Objects.
requireNonNull(
whenSourceFactory.
apply(
other),
"The whenSourceFactory returned a null Publisher");
}
catch (
Throwable e) {
actual.
onError(
Operators.
onOperatorError(
e,
actual.
currentContext()));
return;
}
p.
subscribe(
other);
if (!
main.
cancelled) {
source.
subscribe(
main);
}
}
}