private void saveInvitationCodes(List<InvitationCodeDTO> dtoList) {
if (CollectionUtil.isEmpty(dtoList)) return;
NotificationWriter writer = notificationDaoManager.getWriter();
Object status = writer.begin();
InvitationCode code;
try {
for (InvitationCodeDTO dto : dtoList) {
code = new InvitationCode();
writer.save(code.fromDto(dto));
}
writer.commit(status);
} finally {
writer.rollback(status);
}
}