1 package org.codehaus.plexus.util.cli;
2
3 /*
4 * Copyright The Codehaus Foundation.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 import java.security.AccessControlException;
20
21 /**
22 * A shutdown hook that does not throw any exceptions upon container startup/shutdown or security manager restrictions.
23 * Incorrect usage of the hook itself may still throw an exception.
24 *
25 * @author Kristian Rosenvold
26 */
27 class ShutdownHookUtils {
28
29 public static void addShutDownHook(Thread hook) {
30 try {
31 Runtime.getRuntime().addShutdownHook(hook);
32 } catch (IllegalStateException ignore) {
33 } catch (AccessControlException ignore) {
34 }
35 }
36
37 public static void removeShutdownHook(Thread hook) {
38 try {
39 Runtime.getRuntime().removeShutdownHook(hook);
40 } catch (IllegalStateException ignore) {
41 } catch (AccessControlException ignore) {
42 }
43 }
44 }