case PN_DELIVERY:
            link = pn_event_link ( event );
            delivery = pn_event_delivery ( event );

            if ( pn_delivery_readable ( delivery ) )
            {
              if ( ! pn_delivery_partial ( delivery ) )
              {
                ++ delivery_count;
                if ( ! (delivery_count % report_frequency) )
                {
                  char incoming [ 1000 ];
                  pn_link_t * delivery_link = pn_delivery_link ( delivery );
                  int received_bytes = pn_delivery_pending ( delivery );
                  pn_link_recv ( delivery_link, incoming, 1000 );
                  fprintf ( stderr, "MDEBUG received bytes: %d\n", received_bytes );
                }

                // don't bother updating.  they're pre-settled.
                // pn_delivery_update ( delivery, PN_ACCEPTED );
                pn_delivery_settle ( delivery );

                credit = pn_link_credit ( link );