J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.management.loading; |
| 27 | |
| 28 | import static com.sun.jmx.defaults.JmxProperties.MBEANSERVER_LOGGER; |
| 29 | import java.util.Iterator; |
| 30 | import java.util.List; |
| 31 | import java.util.logging.Level; |
| 32 | import javax.management.MBeanServer; |
| 33 | import javax.management.MBeanServerFactory; |
| 34 | |
| 35 | /** |
| 36 | * <p>Keeps the list of Class Loaders registered in the MBean Server. |
| 37 | * It provides the necessary methods to load classes using the registered |
| 38 | * Class Loaders.</p> |
| 39 | * |
| 40 | * <p>This deprecated class is maintained for compatibility. In |
| 41 | * previous versions of JMX, there was one |
| 42 | * <code>DefaultLoaderRepository</code> shared by all MBean servers. |
| 43 | * As of JMX 1.2, that functionality is approximated by using {@link |
| 44 | * MBeanServerFactory#findMBeanServer} to find all known MBean |
| 45 | * servers, and consulting the {@link ClassLoaderRepository} of each |
| 46 | * one. It is strongly recommended that code referencing |
| 47 | * <code>DefaultLoaderRepository</code> be rewritten.</p> |
| 48 | * |
| 49 | * @deprecated Use |
| 50 | * {@link javax.management.MBeanServer#getClassLoaderRepository()}} |
| 51 | * instead. |
| 52 | * |
| 53 | * @since 1.5 |
| 54 | */ |
| 55 | @Deprecated |
| 56 | public class DefaultLoaderRepository { |
| 57 | |
| 58 | /** |
| 59 | * Go through the list of class loaders and try to load the requested |
| 60 | * class. |
| 61 | * The method will stop as soon as the class is found. If the class |
| 62 | * is not found the method will throw a <CODE>ClassNotFoundException</CODE> |
| 63 | * exception. |
| 64 | * |
| 65 | * @param className The name of the class to be loaded. |
| 66 | * |
| 67 | * @return the loaded class. |
| 68 | * |
| 69 | * @exception ClassNotFoundException The specified class could not be |
| 70 | * found. |
| 71 | */ |
| 72 | public static Class loadClass(String className) |
| 73 | throws ClassNotFoundException { |
| 74 | MBEANSERVER_LOGGER.logp(Level.FINEST, |
| 75 | DefaultLoaderRepository.class.getName(), |
| 76 | "loadClass", className); |
| 77 | return load(null, className); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Go through the list of class loaders but exclude the given |
| 82 | * class loader, then try to load |
| 83 | * the requested class. |
| 84 | * The method will stop as soon as the class is found. If the class |
| 85 | * is not found the method will throw a <CODE>ClassNotFoundException</CODE> |
| 86 | * exception. |
| 87 | * |
| 88 | * @param className The name of the class to be loaded. |
| 89 | * @param loader The class loader to be excluded. |
| 90 | * |
| 91 | * @return the loaded class. |
| 92 | * |
| 93 | * @exception ClassNotFoundException The specified class could not be |
| 94 | * found. |
| 95 | */ |
| 96 | public static Class loadClassWithout(ClassLoader loader, |
| 97 | String className) |
| 98 | throws ClassNotFoundException { |
| 99 | MBEANSERVER_LOGGER.logp(Level.FINEST, |
| 100 | DefaultLoaderRepository.class.getName(), |
| 101 | "loadClassWithout", className); |
| 102 | return load(loader, className); |
| 103 | } |
| 104 | |
| 105 | private static Class load(ClassLoader without, String className) |
| 106 | throws ClassNotFoundException { |
| 107 | final List mbsList = MBeanServerFactory.findMBeanServer(null); |
| 108 | |
| 109 | for (Iterator it = mbsList.iterator(); it.hasNext(); ) { |
| 110 | MBeanServer mbs = (MBeanServer) it.next(); |
| 111 | ClassLoaderRepository clr = mbs.getClassLoaderRepository(); |
| 112 | try { |
| 113 | return clr.loadClassWithout(without, className); |
| 114 | } catch (ClassNotFoundException e) { |
| 115 | // OK : Try with next one... |
| 116 | } |
| 117 | } |
| 118 | throw new ClassNotFoundException(className); |
| 119 | } |
| 120 | |
| 121 | } |