1 /*
   2  * Copyright (c) 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 import java.lang.management.ManagementFactory;
  25 import java.lang.management.PlatformManagedObject;
  26 
  27 /*
  28  * @test
  29  * @bug     8042901
  30  * @summary If jdk.management is present, GarbageCollectorMXBean and ThreadMXBean
  31  *          must be from com.sun.management.internal
  32  * @author  Shanliang Jiang
  33  */
  34 public class CheckSomeMXBeanImplPackage {
  35     private static String implPackageName = "com.sun.management.internal";
  36 
  37     public static void main(String[] args) throws Exception {
  38         boolean present = false;
  39         try {
  40             Class.forName("com.sun.management.GarbageCollectorMXBean");
  41             present = true;
  42         } catch (ClassNotFoundException cnfe) {}
  43 
  44         if (present) {
  45             Class <? extends PlatformManagedObject> klazz = 
  46                     java.lang.management.GarbageCollectorMXBean.class;
  47             for (Object obj :
  48                     ManagementFactory.getPlatformMXBeans(klazz)) {
  49                 check(klazz.getName(), obj);
  50             }
  51             
  52             klazz = com.sun.management.GarbageCollectorMXBean.class;
  53             for (Object obj :
  54                     ManagementFactory.getPlatformMXBeans(klazz)) {
  55                 check(klazz.getName(), obj);
  56             }
  57 
  58             klazz = java.lang.management.ThreadMXBean.class;
  59             check(klazz.getName(),
  60                     ManagementFactory.getPlatformMXBean(klazz));
  61             
  62             klazz = com.sun.management.ThreadMXBean.class;
  63             check(klazz.getName(),
  64                     ManagementFactory.getPlatformMXBean(klazz));
  65 
  66             System.out.println("--- PASSED!");
  67         } else {
  68             System.out.println("--- Skip the test, jdk.management module is not present!");
  69         }
  70     }
  71 
  72     private static void check(String mbeanName, Object impl) {
  73         if (!impl.getClass().getName().startsWith(implPackageName)) {
  74             throw new RuntimeException(mbeanName+" implementation package "
  75                     + "should be: " + implPackageName
  76                     + ", but got: " + impl.getClass());
  77         } else {
  78             System.out.println("--- Good, "+mbeanName+" got right implementation: " + impl);
  79         }
  80     }
  81 }