SmackConnection.java

public void connect() throws IOException, XMPPException, SmackException {
        xmpptcpConnection = new XMPPTCPConnection(XMPPTCPConnectionConfiguration.builder()
                .setSecurityMode(disabled)
                .setResource(resource)
                .setHost(localhost)
                .setServiceName(serviceName)
                .setPort(port)
                .setSendPresence(true)
                .setDebuggerEnabled(true)
                .build()
        );

        // Unutar n miliseknudi provjeri je li dosla poruka o primitku
        xmpptcpConnection.setPacketReplyTimeout(10000);

        // Prepare listeners before inital connecting.
        xmpptcpConnection.addConnectionListener(this);

        // Povezi se
        xmpptcpConnection.connect();

        // Provjerava dostupnost Openfire servera svakih 10*60s = 10min.
        PingManager.setDefaultPingInterval(600);
        PingManager.getInstanceFor(xmpptcpConnection).registerPingFailedListener(this);
    }