source: branches/2.2/jabberit_messenger/java_source/src/nu/fw/jeti/backend/Output.java @ 3102

/* 
 *      Jeti, a Java Jabber client, Copyright (C) 2003 E.S. de Boer  
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *      For questions, comments etc, 
 *      use the website at http://jeti.jabberstudio.org
 *  or mail/im me at jeti@jabber.org
 *  
 *  created 2001
 */

package nu.fw.jeti.backend;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.net.Socket;
import java.util.LinkedList;

import nu.fw.jeti.jabber.elements.Packet;
import nu.fw.jeti.plugins.PluginsInfo;
import nu.fw.jeti.util.Preferences;


/**
 * @author E.S. de Boer
 */

public class Output extends Thread
{
        private Writer out;
        private LinkedList queue = new LinkedList();
        private volatile boolean isRunning=true;
        private volatile boolean closeSocketOnExit=true;
        private Socket socket;
        public static final int KEEP_ALIVE = 60000;
        private KeepAlivePacket keepAlivePacket =  new KeepAlivePacket();
        private ConnectionPacketReceiver backend;
        private volatile boolean authenticated = false;
        private String host;
        
    public Output(Socket socket,String host,ConnectionPacketReceiver backend,OutputStream stream) throws IOException
    {
                this.socket = socket;
                this.backend = backend;
                this.host = host;
                try{
                    out = new BufferedWriter(new OutputStreamWriter(stream,"UTF8"));
                }catch (UnsupportedEncodingException e){e.printStackTrace();}
                writeHeader();
                start();
        }
    
    public void writeHeader() throws IOException
    {
        //send stream init tag
                out.write("<?xml version='1.0' encoding='UTF-8'?>");
                out.write("<stream:stream xmlns:stream='http://etherx.jabber.org/streams' ");
                out.write("xmlns='jabber:client' ");
                if(PluginsInfo.isPluginLoaded("xmpp"))out.write("version='1.0' ");
                out.write("to='");
                out.write(host);
                String lang = Preferences.getString("jeti","language",null);
                if(lang!=null)
                {
                        String country = Preferences.getString("jeti","country",null);
                        if(country!=null)lang+="-"+country;
                        out.write("' xml:lang='");
                        out.write(lang);
                }
                out.write("'>");
                out.flush();
    }

    public void send(Packet p)
    {
                if(isRunning)
                {
                        synchronized(queue)
                        {
                                queue.addLast(p);
                                queue.notifyAll();
                        }
                }
        }

        public void disconnect(boolean closeSocket)
        {
                this.closeSocketOnExit = closeSocket;
            isRunning = false;
                synchronized(queue){queue.notifyAll();}
        }
        
        public void setAuthenticated()
        {
                authenticated = true;
        }

    public final void run()
    {
        Packet packet;
                while ((isRunning) || (!queue.isEmpty()))
                {
                        synchronized(queue)
                        {
                                if (queue.isEmpty())
                                {
                                        if(isRunning)
                                        {
                                                try
                                                {
                                                        queue.wait(KEEP_ALIVE);
                                                }
                                                catch(InterruptedException e)
                                                {
                                                        e.printStackTrace();
                                                        return;
                                                }
                                                if(authenticated && queue.isEmpty()) queue.add(keepAlivePacket);
                                        }
                                        continue;
                                }
                                else packet =(Packet) queue.removeFirst();
                        }
                        //send packet
                        String xml = packet.toString();
                        try
                        {
                                nu.fw.jeti.util.Log.sendXML(xml);
                                out.write(xml);
                                out.flush();
                        }
                        catch(IOException e)
                        {
                                if(!socket.isClosed())
                                {       
                                        nu.fw.jeti.util.Log.notSend(xml);
                                        if(isRunning) backend.outputDeath();//only reconnect if output thread in running status
                        try{
                                System.out.println("closing socket");
                            socket.close();
                        } catch (IOException ex){ }
                                }
                                return;
                        }
                }
                if(closeSocketOnExit && !socket.isClosed())
                {       
                        try
                        {//close stream
                                out.write("</stream:stream>");
                                out.flush();
                                System.out.println("closing socket");
                                socket.close();
                                
                        }
                        catch(Exception e)
                        {e.printStackTrace();}
                }
    }
}

class KeepAlivePacket extends Packet
{
    public void appendToXML(StringBuffer xml)
    {
        xml.append(' ');
    }
}

/*
 * Overrides for emacs
 * Local variables:
 * tab-width: 4
 * End:
 */