Xmpp protocol with java webservices

[Chamath]

I'm trying to integrate xmpp with java web services. But it pops some errors. How to overcome with this ? This is my code.

import java.util.*;

import org.jivesoftware.smack.Chat;

import org.jivesoftware.smack.ConnectionConfiguration;

import org.jivesoftware.smack.MessageListener;

import org.jivesoftware.smack.Roster;

import org.jivesoftware.smack.RosterEntry;

import org.jivesoftware.smack.XMPPConnection;

import org.jivesoftware.smack.XMPPException;

import org.jivesoftware.smack.packet.Message;

public class Function implements MessageListener {

XMPPConnection connection;

public String[] login(String userName, String password) {

try {

ConnectionConfiguration config = new ConnectionConfiguration(

"host", port, "Work");

connection = new XMPPConnection(config);

connection.connect();

connection.login(userName, password);

} catch (XMPPException e) {

System.out.println(e);

}

return displayBuddyList();

}

public String[] displayBuddyList() {

Roster roster = connection.getRoster();

Collection<RosterEntry> entries = roster.getEntries();

String[] buddy = new String[entries.size()];

int i = 0;

for (RosterEntry r : entries) {

buddy[i] = r.getUser();

i++;

}

return buddy;

}

public void sendMessage(String message, String to) {

try {

Chat chat = connection.getChatManager().createChat(to, this);

chat.sendMessage(message);

} catch (XMPPException e) {

System.out.println(e);

}

}

public void disconnect() {

connection.disconnect();

}

@Override

public void processMessage(Chat chat, Message message) {

if (message.getType() == Message.Type.chat)

System.out.println(chat.getParticipant() + " says: " +

message.getBody());

 

}

}