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 }