smack code for fb chat

gistfile1.java

SASLAuthentication.registerSASLMechanism(SASLXFacebookPlatformMechanism.NAME, SASLXFacebookPlatformMechanism.class);
SASLAuthentication.supportSASLMechanism(SASLXFacebookPlatformMechanism.NAME, 0);

ConnectionConfiguration config = new ConnectionConfiguration("chat.facebook.com", 5222);
config.setSASLAuthenticationEnabled(true);
config.setDebuggerEnabled(false);

XMPPConnection conn = null;
try {
	conn = new XMPPConnection(config);
	conn.connect();
	conn.login(Config.FACEBOOK_APP_ID, myFbToken, "Joi.IM"); // Client name optional
	Roster roster = conn.getRoster();
	Collection<RosterEntry> entries = roster.getEntries();

	ObjectNode friendsRoot = Json.newObject();
	ArrayNode friendsArray = friendsRoot.putArray("friends");
	for(RosterEntry entry: entries) {
	ObjectNode friendNode = Json.newObject();
	String chatId = entry.getUser();
	friendNode.put("fbId", chatId.substring(1, chatId.indexOf("@")));
	friendNode.put("name", entry.getName());

	Presence presence = roster.getPresence(entry.getUser());
	Logger.debug(">>> presence = " + presence.toString() + ", name = " + entry.getName());
	friendNode.put("mode", presence.toString());
	friendsArray.add(friendNode);
	}
	Cache.set(myFbId + "-friends-presence", friendsRoot);
	String resultString = callback + "(" + friendsRoot.toString() + ")";
	return ok(resultString).as("text/javascript; charset=UTF-8");
} catch (XMPPException ex) {
	play.Logger.warn("Failed to connect to fb chat for status", ex);
	ex.printStackTrace();
} finally {
	if (conn != null) {
	conn.disconnect();
	}
}