1 /* 2 * Copyright (c) 2003, Oracle and/or its affiliates. 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 4839389 27 * @summary Test that a class can load MBeans from its class loader 28 * (at least if it is the system class loader) 29 * @author Eamonn McManus 30 * @run clean SystemClassLoaderTest 31 * @run build SystemClassLoaderTest 32 * @run main SystemClassLoaderTest 33 */ 34 35 import javax.management.MBeanServer; 36 import javax.management.MBeanServerFactory; 37 import javax.management.ObjectName; 38 39 /* Test that we can load an MBean using createMBean(className, objectName) 40 even if the class of the MBean is not known to the JMX class loader. */ 41 public class SystemClassLoaderTest { 42 43 public static void main(String[] args) throws Exception { 44 // Instantiate the MBean server 45 // 46 System.out.println("Create the MBean server"); 47 MBeanServer mbs = MBeanServerFactory.createMBeanServer(); 48 49 ClassLoader mbsClassLoader = mbs.getClass().getClassLoader(); 50 51 String testClassName = Test.class.getName(); 52 53 // Check that the MBeanServer class loader does not know our test class 54 try { 55 Class.forName(testClassName, true, mbsClassLoader); 56 System.out.println("TEST IS INVALID: MBEANSERVER'S CLASS LOADER " + 57 "KNOWS OUR TEST CLASS"); 58 System.exit(1); 59 } catch (ClassNotFoundException e) { 60 // As required 61 } 62 63 // Register the MBean 64 // 65 System.out.println("Create MBean from this class"); 66 ObjectName objectName = new ObjectName("whatever:type=whatever"); 67 mbs.createMBean(testClassName, objectName); 68 // Test OK! 69 // 70 System.out.println("Bye! Bye!"); 71 } 72 73 public static class Test implements TestMBean { 74 public Test() {} 75 } 76 77 public static interface TestMBean {} 78 }