// File: IO8_server.java (Module 13)
//
// Author: Rahul Simha
// Created: Nov 28, 1998
//
// Producer as server, using sockets.

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

class Producer extends Frame implements Runnable {

  Label L;     // A place to write stuff.
  OutputStream out_stream;

  public Producer (OutputStream out_stream)
  {
    // Store the reference to the output stream.
    this.out_stream = out_stream;

    // Create the frame.
    this.setSize (600,100);
    this.setLocation (0,100);
    this.setTitle ("Producer");
    this.setBackground (Color.white);
    // this.setLayout (new BorderLayout());

    // This is where we will write to.
    L = new Label ("");
    this.add (L, BorderLayout.CENTER);

    this.setVisible (true);
  }


  // Must implement the run() method.

  public void run ()
  {
    // Write 25 random bytes to the buffer.

    for (int i=1; i<=25; i++) {
      // Create a random byte
      byte k = (byte) UniformRandom.uniform (1, 100);

      // Write to label first.
      L.setText (L.getText() + " " + k);

      // Write it to the screen.
      System.out.println ("Producer: writing " + k);

      // Write integer to buffer.
      try {
	out_stream.write (k);
      }
      catch (IOException e) { System.out.println (e); }

      // Sleep for a while.
      try {
	Thread.sleep ((int)UniformRandom.uniform(100,1000));
      } catch (InterruptedException e) { System.out.println (e); }
    }

    // Write EOF and close output stream.
    try {
      out_stream.write (-1);
      out_stream.close ();
    }
    catch (IOException e) { System.out.println (e); }

    L.setText (L.getText() + " Done!");
  }

}


// This is an independent quit button to quit the application.

class QuitButton extends Frame {

  public QuitButton ()
  {
    this.setSize (80,50);
    this.setLocation (0, 0);
    this.setTitle ("Quit button");
    Button quitb = new Button ("QUIT");
    quitb.setBackground (Color.red);
    quitb.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  System.exit (0);
	}
      }
    );
    this.add (quitb, BorderLayout.CENTER);
    this.setVisible (true);
  }

}


public class IO8_server {

  public static void main (String[] argv)
  {
    // Create an independent quit button.
    QuitButton q = new QuitButton ();

    try {
      // Create a listening service for connections
      // at the designated port number.
      ServerSocket srv = new ServerSocket (5010);

      // When a connection is made, get the socket.
      // The method accept() blocks until then.
      System.out.println ("Producer as server: waiting for a connection");
      Socket soc = srv.accept ();

      // At this stage, the connection will have been made.
      InetAddress remote_machine = soc.getInetAddress();
      System.out.println ("Consumer as server: accepted a connection"
			  + " from " + remote_machine);

      // We are going to write, so get the output stream.
      OutputStream out_stream = soc.getOutputStream ();
      
      // Create a producer instance and thread.
      Producer p = new Producer (out_stream);
      Thread pthread = new Thread (p);
      
      // Start the threads.
      pthread.start();
    }
    catch (IOException e) { System.out.println (e); }
  }

}