// markDown closes conn and temporarily marks the associated
// end point as unusable.
func (sdc *ShardConn) markDown(conn tabletconn.TabletConn, reason string) {
sdc.mu.Lock()
defer sdc.mu.Unlock()
if conn != sdc.conn {
return
}
sdc.balancer.MarkDown(conn.EndPoint().Uid, reason)
// Launch as goroutine so we don't block
go sdc.conn.Close()
sdc.conn = nil
}
// StreamExecute executes a streaming query on vttablet. The retry rules are the same as Execute.
func (sdc *ShardConn) StreamExecute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (<-chan *mproto.QueryResult, tabletconn.ErrFunc) {
var usedConn tabletconn.TabletConn
var erFunc tabletconn.ErrFunc
var results <-chan *mproto.QueryResult
err := sdc.withRetry(ctx, func(conn tabletconn.TabletConn) error {
var err error
results, erFunc, err = conn.StreamExecute(ctx, query, bindVars, transactionID)
usedConn = conn
return err
}, transactionID, true)
if err != nil {
return results, func() error { return err }
}
inTransaction := (transactionID != 0)
return results, func() error { return sdc.WrapError(erFunc(), usedConn.EndPoint(), inTransaction) }
}