/**
* Copyright 2007 The Apache Software Foundation
*
* 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.
*/
package org.apache.hadoop.hbase.hql;
import java.io.IOException;
import java.security.Permission;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hbase.Shell;
/**
* This is intended as a replacement for the default system manager. The goal is
* to intercept System.exit calls and make it throw an exception instead so that
* a System.exit in a jar command program does not fully terminate Shell.
*
* @see ExitException
*/
public class HQLSecurityManager extends SecurityManager {
/**
* Override SecurityManager#checkExit. This throws an ExitException(status)
* exception.
*
* @param status the exit status
*/
@SuppressWarnings("static-access")
public void checkExit(int status) {
if (status != Shell.EXIT_FLAG) {
// throw new ExitException(status);
// I didn't figure out How can catch the ExitException in shell main.
// So, I just Re-launching the shell.
Shell shell = new Shell();
List<String> argList = new ArrayList<String>();
argList.add(String.valueOf(Shell.RELAUNCH_FLAG));
if(Shell.HTML_OPTION != null)
argList.add(Shell.HTML_OPTION);
if(Shell.MASTER_ADDRESS != null)
argList.add(Shell.MASTER_ADDRESS);
try {
shell.main(argList.toArray(new String[] {}));
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* Override SecurityManager#checkPermission. This does nothing.
*
* @param perm the requested permission.
*/
public void checkPermission(Permission perm) {
}
}