1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. 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,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.shared.utils.cli;
20
21 import java.security.AccessControlException;
22
23 /**
24 * A shutdown hook that does not throw any exceptions upon container startup/shutdown or security manager
25 * restrictions.
26 *
27 * Incorrect usage of the hook itself may still throw an exception.
28 *
29 * @author Kristian Rosenvold
30 */
31 public class ShutdownHookUtils {
32
33 /**
34 * @param hook The thread hook.
35 */
36 public static void addShutDownHook(Thread hook) {
37 try {
38 Runtime.getRuntime().addShutdownHook(hook);
39 } catch (IllegalStateException ignore) {
40 // ignore
41 } catch (AccessControlException ignore) {
42 // ignore
43 }
44 }
45
46 /**
47 * @param hook The hook which should be removed.
48 */
49 public static void removeShutdownHook(Thread hook) {
50 try {
51 Runtime.getRuntime().removeShutdownHook(hook);
52 } catch (IllegalStateException ignore) {
53 // ignore
54 } catch (AccessControlException ignore) {
55 // ignore
56 }
57 }
58 }