/** When the delivery successes. */
private void onDeliverySuccess(TransactionClient tc, String result) {
printLog("Message successfully delivered (" + result + ").");
Message req = tc.getRequestMessage();
NameAddress recipient = req.getToHeader().getNameAddress();
String subject = null;
if (req.hasSubjectHeader()) subject = req.getSubjectHeader().getSubject();
if (listener != null) listener.onMaDeliverySuccess(this, recipient, subject, result);
}
