package nmp.util;
   
   import java.util.Vector;
   
   /***
    * Creates a thread to sequentially execute the task that the user assigns to
    * this processor <BR>
    * NOTE: The thread must be started.
    */
  public class TaskProcessor
  	extends Thread
  {
  	private Vector msgs;
  	
  	public TaskProcessor() {
  		msgs = new Vector();
  	}
  	
  	public synchronized void addTask( Runnable run) {
  		msgs.addElement( run);
  		this.notifyAll();
  	}
  	
  	public void run() {
  		for( ; ; ) {
  			Runnable run = null;
  			synchronized( this) {
  				while( msgs.size() == 0) {
  					try {
  						this.wait();
  					} catch( InterruptedException e) {
  						// do nothing
  					}
  				}
  				run = (Runnable)msgs.elementAt( 0);
  				msgs.removeElementAt( 0);
  			}
  			try {
  				run.run();
  			} catch( RuntimeException e) {
  				// do nothing
  			}
  		}
  	}
  }