/*
* 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.scheduler;
import java.util.concurrent.
Executor;
import java.util.concurrent.
TimeUnit;
import reactor.core.
Disposable;
import reactor.core.
Scannable;
/**
* Wraps one of the workers of some other Scheduler and
* provides Worker services on top of it.
* <p>
* Use the dispose() to release the wrapped worker.
* This scheduler is time-capable if the worker itself is time-capable (can schedule with
* a delay and/or periodically).
*/
final class
SingleWorkerScheduler implements
Scheduler,
Executor,
Scannable {
final
Worker main;
SingleWorkerScheduler(
Scheduler actual) {
this.
main =
actual.
createWorker();
}
@
Override
public void
dispose() {
main.
dispose();
}
@
Override
public
Disposable schedule(
Runnable task) {
return
main.
schedule(
task);
}
@
Override
public
Disposable schedule(
Runnable task, long
delay,
TimeUnit unit) {
return
main.
schedule(
task,
delay,
unit);
}
@
Override
public
Disposable schedulePeriodically(
Runnable task, long
initialDelay,
long
period,
TimeUnit unit) {
return
main.
schedulePeriodically(
task,
initialDelay,
period,
unit);
}
@
Override
public void
execute(
Runnable command) {
main.
schedule(
command);
}
@
Override
public
Worker createWorker() {
return new
ExecutorScheduler.
ExecutorSchedulerWorker(this);
}
@
Override
public boolean
isDisposed() {
return
main.
isDisposed();
}
@
Override
public
String toString() {
Scannable mainScannable =
Scannable.
from(
main);
if (
mainScannable.
isScanAvailable()) {
return
Schedulers.
SINGLE + "Worker(" +
mainScannable.
scanUnsafe(
Attr.
NAME) + ")";
}
return
Schedulers.
SINGLE + "Worker(" +
main.
toString() + ")";
}
@
Override
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
TERMINATED ||
key ==
Attr.
CANCELLED) return
isDisposed();
if (
key ==
Attr.
PARENT) return
main;
if (
key ==
Attr.
NAME) return this.
toString();
return
Scannable.
from(
main).
scanUnsafe(
key);
}
}