1 /*
   2  * Copyright (c) 2003, 2016, 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     4930397
  27  * @summary Make sure MemoryMXBean has two notification types.
  28  * @author  Mandy Chung
  29  *
  30  * @modules jdk.management
  31  *
  32  * @run main GetMBeanInfo
  33  */
  34 
  35 import java.lang.management.*;
  36 import javax.management.*;
  37 
  38 public class GetMBeanInfo {
  39     private static final int EXPECTED_NOTIF_TYPES = 2;
  40     private static int count = 0;
  41 
  42     public static void main(String argv[]) throws Exception {
  43         final ObjectName objName;
  44         objName = new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME);
  45 
  46         MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
  47 
  48         MBeanInfo minfo = mbs.getMBeanInfo(objName);
  49         MBeanNotificationInfo[] notifs = minfo.getNotifications();
  50         for (int i = 0; i < notifs.length; i++) {
  51             printNotifType(notifs[i]);
  52         }
  53 
  54         if (count != EXPECTED_NOTIF_TYPES) {
  55             throw new RuntimeException("Unexpected number of notification types"
  56                                        + " count = " + count +
  57                                        " expected = " + EXPECTED_NOTIF_TYPES);
  58         }
  59     }
  60 
  61     private static void printNotifType(MBeanNotificationInfo notif) {
  62         String[] types = notif.getNotifTypes();
  63         for (int i = 0; i < types.length; i++) {
  64             System.out.println(types[i]);
  65             count++;
  66         }
  67     }
  68 }