def lsn_save(self, context, network_id, lsn_id): """Save LSN-Network mapping to the DB.""" try: lsn_db.lsn_add(context, network_id, lsn_id) except db_exc.DBError: err_msg = _('Unable to save LSN for network %s') % network_id LOG.exception(err_msg) raise p_exc.NvpPluginException(err_msg=err_msg)