/*
* 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.time.
Duration;
import java.util.
Objects;
import java.util.concurrent.
Callable;
import reactor.core.
CoreSubscriber;
import reactor.util.annotation.
Nullable;
/**
* Executes the runnable whenever a Subscriber subscribes to this Mono.
*/
final class
MonoRunnable<T> extends
Mono<T> implements
Callable<
Void>,
SourceProducer<T> {
final
Runnable run;
MonoRunnable(
Runnable run) {
this.
run =
Objects.
requireNonNull(
run, "run");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
try {
run.
run();
} catch (
Throwable ex) {
Operators.
error(
actual,
Operators.
onOperatorError(
ex,
actual.
currentContext()));
return;
}
Operators.
complete(
actual);
}
@
Override
@
Nullable
public T
block(
Duration m) {
run.
run();
return null;
}
@
Override
@
Nullable
public T
block() {
run.
run();
return null;
}
@
Override
@
Nullable
public
Void call() throws
Exception {
run.
run();
return null;
}
@
Override
public
Object scanUnsafe(
Attr key) {
return null; //no particular key to be represented, still useful in hooks
}
}