/*
*
* 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.*;
class CalculateThread extends Thread {
OutputStream os;
CalculateThread(ThreadGroup tg, OutputStream os) {
super(tg, "Client Calculate Thread");
this.os = os;
}
public void run() {
// do the calculation, sending results to the OutputStream os
}
}
public class ServerHandler extends TCPServer {
public static final int INTERRUPT = 0;
public static final int CALCULATE = 1;
ThreadGroup tg;
public boolean shouldRun;
private int getCommand(InputStream is) {
// read the command data
return CALCULATE;
}
public void run(Socket data) {
tg = new ThreadGroup("Client Thread Group");
try {
InputStream is = data.getInputStream();
OutputStream os = data.getOutputStream();
while (shouldRun) {
switch(getCommand(is)) {
case INTERRUPT:
tg.interrupt();
break;
case CALCULATE:
new CalculateThread(tg, os).start();
break;
}
}
} catch (Exception e) {
tg.interrupt();
}
}
public static void main(String args[]) throws Exception {
TCPServer serv = new ServerHandler();
serv.startServer(300);
}
}
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