---

CommandHandlerImpl.java

/*  Package Web Test Tools 
 *  Copyright (C) 2001 "Artur Hefczyc" <kobit@users.sourceforge.net>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published
 *  by the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software Foundation,
 *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * $Id: CommandHandlerImpl.java,v 1.1 2002/11/29 15:18:26 kobit Exp $
 * $Author: kobit $
 * $Date: 2002/11/29 15:18:26 $
 */

package wttools.remotecons;

import wttools.remotecons.ifc.CommandHandlerIfc;
import java.io.*;
import java.util.StringTokenizer;

public class CommandHandlerImpl implements CommandHandlerIfc {

  protected String last_command = null;

  public CommandHandlerImpl()
  {}

  public String handleCommand(String command) {
    String res = null;
        if (command.trim().equals("time")) {
          res = ""+new java.util.Date()+"\r\n";
        } // end of if (command.trim().equals("time"))
        if (command.trim().equals("gc")) {
          System.gc();
          res = "OK\r\n";
        } // end of if (command.trim().equals("gc"))
        if (command.trim().startsWith("mem")) {
          Runtime rt = Runtime.getRuntime();
          res = ""+rt.totalMemory()+"/"+rt.freeMemory()+"\r\n";
        } // end of if (command.trim().startsWith("mem"))
        if (command.trim().startsWith("exit")) {
      res =
        "\r\nYou are going to shutdown remote JVM!\r\n"+
        "Are you sure to do this and lost all data? (yes/no): ";
        } // end of if (command.trim().startsWith("exit"))
        if (command.trim().startsWith("exec")) {
          res = externalCommand(command.substring(5).trim());
        } // end of if (command.trim().startsWith("exec"))
    if (command.trim().equals("yes")) {
      if (last_command.trim().startsWith("exit")) {
        System.exit(10);
      } // end of if (last_command.trim().startsWith("exit"))
    } // end of if (command.trim().equals("yes"))
    if (command.trim().equals("no")) {
      if (last_command.trim().startsWith("exit")) {
        res = "\r\n";
      } // end of if (last_command.trim().startsWith("exit"))
    } // end of if (command.trim().equals("no"))
        
        last_command = command;
    return res;
  }

  public String help() {
    String help_text =
          "\r\n"+
      "  time - display current time on server\r\n"+
          "  gc   - run System.gc() command on remote system\r\n"+
          "  mem [total|free] - display amount of total/free memory on remote system\r\n"+
          "  exit [n] - call System.exit(n) on remote system\r\n"+
          "  get [params]+ - complex command require additional parameters,\r\n"+
          "                  call 'help get' for more info. (Not implemented yet.)\r\n"+
          "  set [params]+ - complex command require additional parameters,\r\n"+
          "                  call 'help set' for more info. (Not implemented yet.) \r\n"+
          "  exec [params]+ - run Runtime.exec(String[] params) command on remote system\r\n";
    return help_text;
  }

  public String help(String command) {
    return "";
  }

  protected String externalCommand(String comm) {
        String res = "";
        StringTokenizer stt = new StringTokenizer(comm);
        String[] cmd = new String[stt.countTokens()];
        int i = 0;
        while (stt.hasMoreTokens()) {
          cmd[i++] = stt.nextToken();
        } // end of while (stt.hasMoreTokens())
        try {
          jtools.Process proc = new jtools.Process(cmd);
          proc.exec();
      ByteArrayOutputStream buff_out = proc.getProcessOutputStream();
      ByteArrayOutputStream buff_err = proc.getProcessErrorStream();
      BufferedReader brout = new BufferedReader(new StringReader(buff_out.toString()));
          String line = brout.readLine();
          while (line != null) {
                res += line+"\r\n";
                line = brout.readLine();
          } // end of while (line != null)
          brout.close();
      buff_out.close();
      BufferedReader brerr = new BufferedReader(new StringReader(buff_err.toString()));
      line = brerr.readLine();
          while (line != null) {
                res += line+"\r\n";
                line = brerr.readLine();
          } // end of while (line != null)
          brerr.close();
      buff_err.close();
        } catch (Exception e) {
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
          PrintWriter pw = new PrintWriter(baos, false);
          e.printStackTrace(pw);
          pw.flush();
          res = baos.toString();
          pw.close();
        } // end of try-catch
        return "\r\n"+res;
  }

  public CommandHandlerIfc getInstance() {
    return new CommandHandlerImpl();
  }
  
}// CommandHandlerImpl
/*
 * Changes in file:
 *
 * $Log: CommandHandlerImpl.java,v $
 * Revision 1.1  2002/11/29 15:18:26  kobit
 * Refactoring packages, thanks to RefactorIT
 *
 * Revision 1.1  2002/03/21 09:57:27  kobit
 * 1. Small but important redesign:
 *    - package 'remotecons.wttools' was removed and all classes
 *      were moved to 'remotecons' package
 * 2. Added 'asyncMessage' to provide sending messages to remote clients
 *    in asynchronous mode
 *
 * Revision 1.14  2002/01/23 15:49:24  kobit
 * Java doc for all classes finishedant clean dist
 *
 * Revision 1.13  2002/01/21 16:30:19  kobit
 * Commenting out code in progress
 *
 * Revision 1.12  2002/01/20 18:39:40  kobit
 * Some inprovments added in executing external commands
 *
 * Revision 1.11  2002/01/18 14:18:46  kobit
 * Next part of javadoc documentation
 *
 * Revision 1.10  2002/01/17 10:39:09  kobit
 * Bug corrected in reading stream from process run by remote console
 *
 * Revision 1.9  2002/01/15 19:20:01  kobit
 * Corrected bug in external command runner
 *
 * Revision 1.8  2002/01/14 17:02:01  kobit
 * Changed interface to CommandHandlersIfc
 *
 * Revision 1.7  2002/01/13 17:14:45  kobit
 * Added commands: ls, show file, echo and support for windows telnet
 *
 * Revision 1.6  2002/01/12 16:19:21  kobit
 * Started code for command 'show filename'
 *
 * Revision 1.5  2002/01/12 12:54:22  kobit
 * Bug in closing connection command fixed
 *
 * Revision 1.4  2002/01/12 12:25:34  kobit
 * Almost finished basic code
 *
 *
 */

---