/** 
 * This program is an example from the book "Internet 
 * programming with Java" by Svetlin Nakov. It is freeware. 
 * For more information: http://www.nakov.com/books/inetjava/ 
 */ 
import java.io.*; 
import java.net.*; 
import java.util.*; 
 
public class StockQuoteServer { 
    public static int PORT = 2004; 
 
    public static void main(String[] args) throws IOException { 
        ServerSocket serverSocket = new ServerSocket(PORT); 
        while (true) { 
            Socket socket = serverSocket.accept(); 
            StockQuoteThread clientThread = 
                new StockQuoteThread(socket); 
            clientThread.start(); 
        } 
    } 
} 
 
class StockQuoteThread extends Thread { 
    private Socket mSocket; 
    private BufferedReader mSocketReader; 
    private PrintWriter mSocketWriter; 
    private Random mRandomGenerator = new Random(); 
 
    public StockQuoteThread(Socket aSocket) throws IOException { 
        mSocket = aSocket; 
        mSocketReader = new BufferedReader( 
            new InputStreamReader(mSocket.getInputStream())); 
        mSocketWriter = new PrintWriter( 
            new OutputStreamWriter(mSocket.getOutputStream())); 
    } 
 
    public void run() { 
        try { 
            String companyTicker = mSocketReader.readLine(); 
            while (!isInterrupted()) { 
                String quote = companyTicker + ": " + 
                    getDate() + " " + getRandomQuote(); 
                mSocketWriter.println(quote); 
                mSocketWriter.flush(); 
                int delay = mRandomGenerator.nextInt(3000); 
                Thread.sleep(delay); 
            } 
        } catch (Exception ex) { 
            ex.printStackTrace(); 
        } 
    } 
 
    private String getRandomQuote() { 
        int value = mRandomGenerator.nextInt(10000); 
        return " " + (value / 100) + "." + value % 100; 
    } 
 
    private String getDate() { 
        return (new Date()).toString(); 
    } 
}