package net.sourceforge.guacamole.net.basic;
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is guacamole-common.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael Jumper.
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
import java.io.File;
import java.io.FilenameFilter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Collection;
import net.sourceforge.guacamole.GuacamoleException;
import net.sourceforge.guacamole.net.basic.properties.BasicGuacamoleProperties;
import net.sourceforge.guacamole.properties.GuacamoleProperties;
-/*
- * Guacamole - Clientless Remote Desktop
- * Copyright (C) 2010 Michael Jumper
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+/**
+ * A ClassLoader implementation which finds classes within a configurable
+ * directory. This directory is set within guacamole.properties.
+ *
+ * @author Michael Jumper
*/
-
public class GuacamoleClassLoader extends ClassLoader {
private URLClassLoader classLoader = null;
try {
// Attempt to create singleton classloader which loads classes from
// all .jar's in the lib directory defined in guacamole.properties
- instance = new GuacamoleClassLoader(
- GuacamoleProperties.getProperty(BasicGuacamoleProperties.LIB_DIRECTORY)
- );
- }
-
- catch (GuacamoleException e) {
- // On error, record exception
- exception = e;
+ instance = AccessController.doPrivileged(new PrivilegedExceptionAction<GuacamoleClassLoader>() {
+
+ @Override
+ public GuacamoleClassLoader run() throws GuacamoleException {
+ return new GuacamoleClassLoader(
+ GuacamoleProperties.getProperty(BasicGuacamoleProperties.LIB_DIRECTORY)
+ );
+ }
+
+ });
}
- catch (NullPointerException e) {
+ catch (PrivilegedActionException e) {
// On error, record exception
- e.printStackTrace(System.err);
+ exception = (GuacamoleException) e.getException();
}
}
}
+ /**
+ * Returns an instance of a GuacamoleClassLoader which finds classes
+ * within the directory configured in guacamole.properties.
+ *
+ * @return An instance of a GuacamoleClassLoader.
+ * @throws GuacamoleException If no instance could be returned due to an
+ * error.
+ */
public static GuacamoleClassLoader getInstance() throws GuacamoleException {
// If instance could not be created, rethrow original exception