1 /* 2 * Copyright (c) 2013, 2017, 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 }