1 /*

     2  * Copyright (c) 2013 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 sun.management.ManagementFactoryHelper;

    25 

    26 import com.sun.management.DiagnosticCommandMBean;

    27 

    28 public class DcmdUtil

    29 {

    30     public static String executeDcmd(String cmd, String ... args) {

    31         DiagnosticCommandMBean dcmd = ManagementFactoryHelper.getDiagnosticCommandMBean();

    32         Object[] dcmdArgs = {args};

    33         String[] signature = {String[].class.getName()};

    34 

    35         try {

    36             System.out.print("> " + cmd + " ");

    37             for (String s : args) {

    38                 System.out.print(s + " ");

    39             }

    40             System.out.println(":");

    41             String result = (String) dcmd.invoke(transform(cmd), dcmdArgs, signature);

    42             System.out.println(result);

    43             return result;

    44         } catch(Exception ex) {

    45             ex.printStackTrace();

    46         }

    47         return null;

    48     }

    49 

    50     private static String transform(String name) {

    51         StringBuilder sb = new StringBuilder();

    52         boolean toLower = true;

    53         boolean toUpper = false;

    54         for (int i = 0; i < name.length(); i++) {

    55             char c = name.charAt(i);

    56             if (c == '.' || c == '_') {

    57                 toLower = false;

    58                 toUpper = true;

    59             } else {

    60                 if (toUpper) {

    61                     toUpper = false;

    62                     sb.append(Character.toUpperCase(c));

    63                 } else if(toLower) {

    64                     sb.append(Character.toLowerCase(c));

    65                 } else {

    66                     sb.append(c);

    67                 }

    68             }

    69         }

    70         return sb.toString();

    71     }

    72 

    73 }