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package org.apache.maven.shared.utils.cli;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.security.AccessControlException;

/**
 * A shutdown hook that does not throw any exceptions upon container startup/shutdown or security manager
 * restrictions.
 *
 * Incorrect usage of the hook itself may still throw an exception.
 *
 * @author Kristian Rosenvold
 */
public class ShutdownHookUtils
{

    public static void addShutDownHook( Thread hook )
    {
        try
        {
            Runtime.getRuntime().addShutdownHook( hook );
        }
        catch ( IllegalStateException ignore )
        {
            // ignore
        }
        catch ( AccessControlException ignore )
        {
            // ignore
        }
    }

    public static void removeShutdownHook( Thread hook )
    {
        try
        {
            Runtime.getRuntime().removeShutdownHook( hook );
        }
        catch ( IllegalStateException ignore )
        {
            // ignore
        }
        catch ( AccessControlException ignore )
        {
            // ignore
        }
    }

}




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