| 1 | package org.jtoolkit.essence.concurrency.impl; |
| 2 | |
| 3 | import org.jetbrains.annotations.Nullable; |
| 4 | import org.jetbrains.annotations.NotNull; |
| 5 | |
| 6 | import java.util.concurrent.ScheduledExecutorService; |
| 7 | import java.lang.ref.Reference; |
| 8 | import java.lang.ref.WeakReference; |
| 9 | |
| 10 | /* |
| 11 | Copyright 2006 Peter Lawrey |
| 12 | |
| 13 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 14 | you may not use this file except in compliance with the License. |
| 15 | You may obtain a copy of the License at |
| 16 | |
| 17 | http://www.apache.org/licenses/LICENSE-2.0 |
| 18 | |
| 19 | Unless required by applicable law or agreed to in writing, software |
| 20 | distributed under the License is distributed on an "AS IS" BASIS, |
| 21 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 22 | See the License for the specific language governing permissions and |
| 23 | limitations under the License. |
| 24 | */ |
| 25 | |
| 26 | /** |
| 27 | * @author Peter Lawrey |
| 28 | */ |
| 29 | public class SesThreadGroup extends ThreadGroup { |
| 30 | // This has a static method as a getter. |
| 31 | @SuppressWarnings({"FieldHasSetterButNoGetter"}) |
| 32 | private Reference<ScheduledExecutorService> ses = null; |
| 33 | |
| 34 | public SesThreadGroup(@NotNull ThreadGroup parent, @NotNull String name) { |
| 35 | super(parent, name); |
| 36 | } |
| 37 | |
| 38 | public void setSes(@NotNull ScheduledExecutorService executor) { |
| 39 | ses = new WeakReference<ScheduledExecutorService>(executor); |
| 40 | } |
| 41 | |
| 42 | @Nullable public static ScheduledExecutorService getSes() { |
| 43 | ThreadGroup tg = Thread.currentThread().getThreadGroup(); |
| 44 | if (tg instanceof SesThreadGroup) { |
| 45 | Reference<ScheduledExecutorService> ref = ((SesThreadGroup) tg).ses; |
| 46 | return ref == null ? null : ref.get(); |
| 47 | } |
| 48 | return null; |
| 49 | } |
| 50 | |
| 51 | /* |
| 52 | public static ScheduledExecutorService getSesOrThrow() throws IllegalStateException { |
| 53 | ThreadGroup tg = Thread.currentThread().getThreadGroup(); |
| 54 | if (tg instanceof SesThreadGroup) { |
| 55 | ScheduledExecutorService ses = ((SesThreadGroup) tg).ses; |
| 56 | if (ses == null) throw new IllegalStateException(Thread.currentThread() + ": SES not set for thread"); |
| 57 | return ses; |
| 58 | } |
| 59 | throw new IllegalStateException(Thread.currentThread() + ": Not a member of an SesThreadGroup."); |
| 60 | } |
| 61 | */ |
| 62 | } |
| 63 | |