1 /* 2 * Copyright (c) 2003, 2015, 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 * @modules java.management 31 * @run clean SystemClassLoaderTest 32 * @run build SystemClassLoaderTest 33 * @run main SystemClassLoaderTest 34 */ 35 36 import javax.management.MBeanServer; 37 import javax.management.MBeanServerFactory; 38 import javax.management.ObjectName; 39 40 /* Test that we can load an MBean using createMBean(className, objectName) 41 even if the class of the MBean is not known to the JMX class loader. */ 42 public class SystemClassLoaderTest { 43 44 public static void main(String[] args) throws Exception { 45 // Instantiate the MBean server 46 // 47 System.out.println("Create the MBean server"); 48 MBeanServer mbs = MBeanServerFactory.createMBeanServer(); 49 50 ClassLoader mbsClassLoader = mbs.getClass().getClassLoader(); 51 52 String testClassName = Test.class.getName(); 53 54 // Check that the MBeanServer class loader does not know our test class 55 try { 56 Class.forName(testClassName, true, mbsClassLoader); 57 System.out.println("TEST IS INVALID: MBEANSERVER'S CLASS LOADER " + 58 "KNOWS OUR TEST CLASS"); 59 System.exit(1); 60 } catch (ClassNotFoundException e) { 61 // As required 62 } 63 64 // Register the MBean 65 // 66 System.out.println("Create MBean from this class"); 67 ObjectName objectName = new ObjectName("whatever:type=whatever"); 68 mbs.createMBean(testClassName, objectName); 69 // Test OK! 70 // 71 System.out.println("Bye! Bye!"); 72 } 73 74 public static class Test implements TestMBean { 75 public Test() {} 76 } 77 78 public static interface TestMBean {} 79 }