func (mc *Client) sendAck(pkt *gomemcached.MCRequest) (int, error) {
res := gomemcached.MCResponse{
Opcode: pkt.Opcode,
Opaque: pkt.Opaque,
Status: gomemcached.SUCCESS,
}
return res.Transmit(mc.conn)
}
func vbRGet(v *VBucket, w io.Writer, req *gomemcached.MCRequest) (
res *gomemcached.MCResponse) {
// From http://code.google.com/p/memcached/wiki/RangeOps
// Extras field Bits
// ------------------
// End key len 16
// Reserved 8
// Flags 8
// Max results 32
res = &gomemcached.MCResponse{
Opcode: req.Opcode,
Cas: req.Cas,
}
extras := make([]byte, 4)
visitRGetResults := int64(0)
visitOutgoingValueBytes := int64(0)
visitor := func(i *item) bool {
if bytes.Compare(i.key, req.Key) >= 0 {
// TODO: Need to hide expired items from range scan.
binary.BigEndian.PutUint32(extras, i.flag)
r := gomemcached.MCResponse{
Opcode: req.Opcode,
Key: i.key,
Cas: i.cas,
Extras: extras,
Body: i.data,
}
err := r.Transmit(w)
if err != nil {
res = &gomemcached.MCResponse{Fatal: true}
return false
}
visitRGetResults++
visitOutgoingValueBytes += int64(len(i.data))
}
return true
}
if err := v.ps.visitItems(req.Key, true, visitor); err != nil {
res = &gomemcached.MCResponse{Fatal: true}
}
atomic.AddInt64(&v.stats.RGets, 1)
atomic.AddInt64(&v.stats.RGetResults, visitRGetResults)
atomic.AddInt64(&v.stats.OutgoingValueBytes, visitOutgoingValueBytes)
return res
}
func transmitResponse(o io.Writer, res *gomemcached.MCResponse) (err error) {
return res.Transmit(o)
}