package org.litesoft.p2pchat;

import java.io.*;
import java.util.*;

// Copyright Status:
//
// All Software available from LiteSoft.org (including this file) is
// hereby released into the public domain.
//
// It is free!  As in, you may use it freely in both commercial and
// non-commercial applications, bundle it with your software
// distribution, include it on a CD-ROM, list the source code in a book,
// mirror the documentation at your own web site, or use it in any other
// way you see fit.
//
// NO Warranty!
//
// All software is provided "as is".
//
// There is ABSOLUTELY NO WARRANTY OF ANY KIND: not for the design, fitness
// (for a particular purpose), level of errors (or lack thereof), or
// applicability of this software.  The entire risk as to the quality
// and performance of this software is with you.  Should this software
// prove defective, you assume the cost of all necessary servicing, repair
// or correction.
//
// In no event unless required by applicable law or agreed to in writing
// will any party who created or may modify and/or redistribute this
// software, be liable to you for damages, including any general,
// special, incidental or consequential damages arising out of the use or
// inability to use this software (including but not limited to loss of
// data or data being rendered inaccurate or losses sustained by you or
// third parties or a failure of this software to operate with any
// other programs), even if such holder or other party has been advised
// of the possibility of such damages.
//
// NOTE: Should you discover a bug, have a recogmendation for a change, wish
// to submit modifications, or wish to add new classes/functionality,
// please email them to:
//
//        changes44@litesoft.org
//

/**
 * @author  Devin Smith and George Smith
 * @version 0.3 02/02/02 Added IllegalArgument.ifNull for all public params that may not be null
 * @version 0.2 01/28/02 Refactored and Added Licence
 * @version 0.1 12/27/01 Initial Version
 */
public class PeerWriter extends Thread
{
    private List zLines = new ArrayList();
    private BufferedWriter zWriter;

    public PeerWriter( OutputStream pOs )
    {
        IllegalArgument.ifNull( "Os" , pOs );
        zWriter = new BufferedWriter( new OutputStreamWriter( pOs ) );
        start();
    }

    public synchronized void writeLine( String pMessage )
    {
        IllegalArgument.ifNull( "Message" , pMessage );
        zLines.add( pMessage );
        notifyAll();
    }

    private synchronized String getline()
    {
        while ( zLines.isEmpty() )
        {
            try
            {
                wait();
            }
            catch ( InterruptedException e )
            {
            }
        }

        Object message = zLines.get( 0 );
        zLines.remove( 0 );
        return (String) message;
    }

    public void run()
    {
        try
        {
            while ( true )
            {
                zWriter.write( getline() );
                zWriter.newLine();
                zWriter.flush();
            }
        }
        catch ( IOException e )
        {
            e.printStackTrace();
            System.exit( 1 );
        }
    }
}