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 /** 36 * @param hook The thread hook. 37 */ 38 public static void addShutDownHook( Thread hook ) 39 { 40 try 41 { 42 Runtime.getRuntime().addShutdownHook( hook ); 43 } 44 catch ( IllegalStateException ignore ) 45 { 46 // ignore 47 } 48 catch ( AccessControlException ignore ) 49 { 50 // ignore 51 } 52 } 53 54 /** 55 * @param hook The hook which should be removed. 56 */ 57 public static void removeShutdownHook( Thread hook ) 58 { 59 try 60 { 61 Runtime.getRuntime().removeShutdownHook( hook ); 62 } 63 catch ( IllegalStateException ignore ) 64 { 65 // ignore 66 } 67 catch ( AccessControlException ignore ) 68 { 69 // ignore 70 } 71 } 72 73 }