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nl.toolforge.karma.core.cmd.threads.ParallelCommandWrapper
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 1   
 /*
 2   
 Karma core - Core of the Karma application
 3   
 Copyright (C) 2004  Toolforge <www.toolforge.nl>
 4   
 
 5   
 This library is free software; you can redistribute it and/or
 6   
 modify it under the terms of the GNU Lesser General Public
 7   
 License as published by the Free Software Foundation; either
 8   
 version 2.1 of the License, or (at your option) any later version.
 9   
 
 10   
 This library is distributed in the hope that it will be useful,
 11   
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 12   
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 13   
 Lesser General Public License for more details.
 14   
 
 15   
 You should have received a copy of the GNU Lesser General Public
 16   
 License along with this library; if not, write to the Free Software
 17   
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 18   
 */
 19   
 package nl.toolforge.karma.core.cmd.threads;
 20   
 
 21   
 import nl.toolforge.karma.core.cmd.Command;
 22   
 import nl.toolforge.karma.core.cmd.CommandException;
 23   
 import nl.toolforge.karma.core.cmd.CommandResponse;
 24   
 import nl.toolforge.karma.core.cmd.event.CommandResponseListener;
 25   
 
 26   
 
 27   
 /**
 28   
  *
 29   
  * @author D.A. Smedes
 30   
  *
 31   
  * @version $Id: ParallelCommandWrapper.java,v 1.3 2004/09/23 07:18:08 asmedes Exp $
 32   
  */
 33   
 public final class ParallelCommandWrapper extends Thread {
 34   
 
 35  0 
   private boolean running = true;
 36   
 
 37  0 
   private Command command = null;
 38   
   private CommandResponseListener listener;
 39  0 
   private CommandException exception = null;
 40   
 
 41  0 
   public ParallelCommandWrapper(Command command, CommandResponseListener listener) {
 42  0 
     this.command = command;
 43  0 
     this.listener = listener;
 44  0 
   }
 45   
 
 46   
   public CommandResponse getCommandResponse() {
 47  0 
     return null;
 48   
   }
 49   
 
 50   
   public void run() {
 51   
 
 52   
     try {
 53   
 
 54  0 
       startRunning();
 55   
 
 56  0 
       command.execute();
 57   
 
 58  0 
     } catch (CommandException c) {
 59  0 
       exception = c;
 60   
     } finally {
 61  0 
       stopRunning();
 62  0 
     }
 63  0 
   }
 64   
 
 65   
   private synchronized void startRunning() {
 66   
 
 67  0 
     running = true;
 68  0 
     command.registerCommandResponseListener(listener);
 69  0 
   }
 70   
 
 71   
   private synchronized void stopRunning() {
 72   
 
 73  0 
     command.deregisterCommandResponseListener(listener);
 74  0 
     command.cleanUp();
 75   
 
 76  0 
     running = false;
 77  0 
   }
 78   
 
 79   
   public synchronized boolean isRunning() {
 80  0 
     return running;
 81   
   }
 82   
 
 83   
   /**
 84   
    * Returns the <code>CommandException</code> when the <code>run</code>-method had thrown one. This method can thus be
 85   
    * used to check the actual results (if an error occurred).
 86   
    *
 87   
    * @return A <code>CommandException</code> or <code>null</code> if no exception was thrown.
 88   
    */
 89   
   public CommandException getException() {
 90  0 
     return exception;
 91   
   }
 92   
 
 93   
 }

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