try{
connection.login(user, password);
System.out.println("Logged in as " + connection.getUser());
Presence presence = new Presence(Presence.Type.available);
connection.sendPacket(presence);
} catch (XMPPException ex){
Logger.getLogger(JabberWorkItemHandler.class.getName()).log(Level.SEVERE, null, ex);
System.out.println("Failed to log in as " + connection.getUser());
System.exit(1);