// File: IO9_server.java (Module 13)
//
// Author: Rahul Simha
// Created: Nov 28, 1998
//
// Consumer as server, using sockets, with the
// producer as applet.

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

class Consumer extends Frame implements Runnable {

  Label L;     // Data similar to Producer.
  InputStream in_stream;

  public Consumer (InputStream in_stream)
  {
    this.in_stream = in_stream;

    this.setSize (600,100);
    this.setLocation (0, 200);
    this.setTitle ("Consumer");
    this.setBackground (Color.white);
    // this.setLayout (new BorderLayout());

    L = new Label ("");
    this.add (L, BorderLayout.CENTER);

    this.setVisible (true);
  }


  public void run ()
  {
    // Read byte values until EOF.

    while (true) {
      // Get the next byte
      int i = -1;
      try {
	i = in_stream.read ();
      }
      catch (IOException e) { System.out.println (e); }

      // Extract byte.
      byte k = (byte) i;

      // Check if end-of-data.
      if ( (i < 0) || (k < 0) ) break;

      System.out.println ("Consumer: just read " + k);

      // Write it on the frame.
      L.setText (L.getText() + " " + k);

      // Sleep for a while.
      try {
	Thread.sleep ((int)UniformRandom.uniform(5,10));
      }
      catch (InterruptedException e) { System.out.println (e); }
    }

    L.setText (L.getText() + " Done!");
    try {
      in_stream.close ();
    }
    catch (IOException e) { System.out.println (e); }

  }

}



// 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 IO9_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 ("Consumer 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 listen, so get an InputStream
      // and hand it over to the consumer.
      InputStream in_stream = soc.getInputStream ();

      // Create a consumer instance and thread.
      Consumer c = new Consumer (in_stream);
      Thread cthread = new Thread (c);
      
      // Start the thread.
      cthread.start();
    }
    catch (IOException e) { System.out.println (e); }
  }

}