1 package org.apache.maven.shared.utils.cli;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.security.AccessControlException;
23
24 /**
25 * A shutdown hook that does not throw any exceptions upon container startup/shutdown or security manager
26 * restrictions.
27 *
28 * Incorrect usage of the hook itself may still throw an exception.
29 *
30 * @author Kristian Rosenvold
31 */
32 public class ShutdownHookUtils
33 {
34
35 public static void addShutDownHook( Thread hook )
36 {
37 try
38 {
39 Runtime.getRuntime().addShutdownHook( hook );
40 }
41 catch ( IllegalStateException ignore )
42 {
43 // ignore
44 }
45 catch ( AccessControlException ignore )
46 {
47 // ignore
48 }
49 }
50
51 public static void removeShutdownHook( Thread hook )
52 {
53 try
54 {
55 Runtime.getRuntime().removeShutdownHook( hook );
56 }
57 catch ( IllegalStateException ignore )
58 {
59 // ignore
60 }
61 catch ( AccessControlException ignore )
62 {
63 // ignore
64 }
65 }
66
67 }