/*
 *
 * Copyright (c) 1997-1999 Scott Oaks and Henry Wong. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and
 * without fee is hereby granted.
 *
 * This sample source code is provided for example only,
 * on an unsupported, as-is basis. 
 *
 * AUTHOR MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. AUTHOR SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  AUTHOR
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */


import java.net.*;
import java.io.*;

public class TCPServer implements Cloneable, Runnable {
	Thread runner = null;
	ServerSocket server = null;
	Socket data = null;
	boolean shouldStop = false;
	ThreadGroup group = null;
	int groupNo = 0;

	public synchronized void startServer(int port) throws IOException {
		if (runner == null) {
			server = new ServerSocket(port);
			runner = new Thread(this);
			runner.start();
		}
	}

	public synchronized void stopServer() {
		if (server != null) {
			shouldStop = true;
			runner.interrupt();
			runner = null;
			try {
				server.close();
			} catch (IOException ioe) {}
			server = null;
		}
	}

	public void run() {
		if (server != null) {
			while (!shouldStop) {
				try {
					Socket datasocket = server.accept();
					TCPServer newSocket = (TCPServer) clone();

					newSocket.server = null;
					newSocket.data = datasocket;
					newSocket.group = new ThreadGroup("Client Group " + groupNo++);
					newSocket.runner = new Thread(newSocket.group, newSocket);
					newSocket.runner.start();
				} catch (Exception e) {}
			}
		} else {
			run(data);
		}
	}
 
	public void run(Socket data) {
 
	}
}