package org.codehaus.mojo.exec;
   
   import java.util.Timer;
   import java.util.TimerTask;
   
   /**
    * @author <a href="mailto:dsmiley@mitre.org">David Smiley</a>
    */
   public class MainWithThreads extends Thread
  {
      public static final String ALL_EXITED = "t1(interrupted td)(cancelled timer)";
      public static final String TIMER_IGNORED = "t1(interrupted td)";
  
      /** 
       * both daemon threads will be interrupted as soon as the non daemon thread is done.
       * the responsive daemon thread will be interrupted right away.
       * - if the timer is cancelled (using 'cancelTimer' as argument), the timer will die on itself
       * after all the other threads
       * - if not, one must use a time out to stop joining on that unresponsive daemon thread
       **/
      public static void main( String[] args )
      {
          // long run so that we interrupt it before it ends itself
          Thread responsiveDaemonThread = new MainWithThreads( 60000, "td" );
          responsiveDaemonThread.setDaemon( true );
          responsiveDaemonThread.start();
  
          new MainWithThreads( 200, "t1" ).start();
  
          // Timer in Java <= 6 aren't interruptible
          final Timer t = new Timer( true );
  
          if ( optionsContains( args, "cancelTimer" ) )
          {
              t.schedule( new TimerTask()
              {
                  public void run()
                  {
                      System.out.print( "(cancelled timer)" );
                      t.cancel();
                  }
              }, 400 );
          }
      }
  
      private static boolean optionsContains( String[] args, String option )
      {
          for (int i = 0; i < args.length; i++ )
          {
              if ( args[i].equals( option ) )
                  return true;
          }
          return false;
      }
  
      private int millisecsToSleep;
      private String message;
  
      public MainWithThreads( int millisecsToSleep, String message )
      {
          this.millisecsToSleep = millisecsToSleep;
          this.message = message;
      }
  
      public void run()
      {
          try
          {
              Thread.sleep( millisecsToSleep );
          }
          catch ( InterruptedException e ) // IE's are a way to cancel a thread
          {
              System.out.print( "(interrupted " + message + ")" );
              return;
          }
          System.out.print( message );
      }
  }