/*
* 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.concurrent.
RejectedExecutionException;
import reactor.core.
CoreSubscriber;
import reactor.core.
Scannable;
import reactor.core.publisher.
FluxSubscribeOnValue.
ScheduledEmpty;
import reactor.core.publisher.
FluxSubscribeOnValue.
ScheduledScalar;
import reactor.core.scheduler.
Scheduler;
import reactor.util.annotation.
Nullable;
/**
* Mono indicating a scalar/empty source that subscribes on the specified scheduler.
*
* @param <T>
*/
final class
MonoSubscribeOnValue<T> extends
Mono<T> implements
Scannable {
final T
value;
final
Scheduler scheduler;
MonoSubscribeOnValue(@
Nullable T
value,
Scheduler scheduler) {
this.
value =
value;
this.
scheduler =
Objects.
requireNonNull(
scheduler, "scheduler");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
T
v =
value;
if (
v == null) {
ScheduledEmpty parent = new
ScheduledEmpty(
actual);
actual.
onSubscribe(
parent);
try {
parent.
setFuture(
scheduler.
schedule(
parent));
}
catch (
RejectedExecutionException ree) {
if (
parent.
future !=
OperatorDisposables.
DISPOSED) {
actual.
onError(
Operators.
onRejectedExecution(
ree,
actual.
currentContext()));
}
}
}
else {
actual.
onSubscribe(new
ScheduledScalar<>(
actual,
v,
scheduler));
}
}
@
Override
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
RUN_ON) return
scheduler;
return null;
}
}