Exemple #1
0
func (s *Scan) processResponse(response pb.Message) []*ResultRow {
	var res *proto.ScanResponse
	switch r := response.(type) {
	case *proto.ScanResponse:
		res = r
	default:
		s.err = errors.New(response.(*exception).msg)
		return nil
	}

	nextRegion := true
	s.nextStartRow = nil
	s.id = res.GetScannerId()

	results := res.GetResults()
	n := len(results)

	lastRegionRows += n

	if (n == s.numCached) ||
		len(s.location.EndKey) == 0 ||
		(s.StopRow != nil && bytes.Compare(s.location.EndKey, s.StopRow) > 0 && n < s.numCached) ||
		res.GetMoreResultsInRegion() {
		nextRegion = false
	}

	if n < s.numCached {
		s.nextStartRow = incrementByteString(s.location.EndKey, len(s.location.EndKey)-1)
	}

	if nextRegion {
		s.closeScan(s.server, s.location, s.id)
		s.server = nil
		s.location = nil
		s.id = 0
		lastRegionRows = 0
	}

	if n == 0 && !nextRegion {
		s.Close()
	}

	tbr := make([]*ResultRow, n)
	for i, v := range results {
		tbr[i] = NewResultRow(v)
	}

	return tbr
}
Exemple #2
0
func (s *Scan) processResponse(response pb.Message) ([]*ResultRow, error) {
	var res *proto.ScanResponse
	switch r := response.(type) {
	case *proto.ScanResponse:
		res = r
	case *exception:
		return nil, errors.New(r.msg)
	default:
		return nil, errors.Errorf("Invalid response seen [response: %#v]", response)
	}

	// Check whether response is nil.
	if res == nil {
		return nil, errors.Errorf("Empty response: [table=%s] [StartRow=%q] [StopRow=%q] ", s.table, s.StartRow, s.StopRow)
	}

	nextRegion := true
	s.nextStartKey = nil
	s.id = res.GetScannerId()

	results := res.GetResults()
	n := len(results)

	if (n == s.numCached) ||
		len(s.location.EndKey) == 0 ||
		(s.StopRow != nil && bytes.Compare(s.location.EndKey, s.StopRow) > 0 && n < s.numCached) ||
		res.GetMoreResultsInRegion() {
		nextRegion = false
	}

	var err error
	if nextRegion {
		s.nextStartKey = s.location.EndKey
		err = s.closeScan(s.server, s.location, s.id)
		if err != nil {
			return nil, errors.Trace(err)
		}
		s.server = nil
		s.location = nil
		s.id = 0
	}

	if n == 0 && !nextRegion {
		err = s.Close()
		if err != nil {
			return nil, errors.Trace(err)
		}
	}

	if s.skipFirst {
		results = results[1:]
		s.skipFirst = false
		n = len(results)
	}

	tbr := make([]*ResultRow, n)
	for i, v := range results {
		if v != nil {
			tbr[i] = NewResultRow(v)
		}
	}

	return tbr, nil
}