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snap.go
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snap.go
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package client
import (
"github.com/Ankr-Shanghai/chainkv/retcode"
"github.com/Ankr-Shanghai/chainkv/types"
)
type Snap struct {
client *client
idx types.ID
}
func (s *Snap) Get(key []byte) ([]byte, error) {
var (
req = &types.Request{
Type: types.REQ_TYPE_SNAP_GET,
Id: s.idx,
Key: key,
}
rsp = &types.Response{Code: retcode.CodeOK}
)
err := s.client.do(req, rsp)
if err != nil {
return nil, err
}
return rsp.Val, nil
}
func (s *Snap) Has(key []byte) (bool, error) {
var (
req = &types.Request{
Type: types.REQ_TYPE_SNAP_HAS,
Id: s.idx,
Key: key,
}
rsp = &types.Response{Code: retcode.CodeOK}
)
err := s.client.do(req, rsp)
if err != nil {
return false, err
}
return rsp.Exist, nil
}
func (s *Snap) Release() error {
var (
req = &types.Request{
Type: types.REQ_TYPE_SNAP_RELEASE,
Id: s.idx,
}
rsp = &types.Response{Code: retcode.CodeOK}
)
err := s.client.do(req, rsp)
if err != nil {
return err
}
s.client.snapMap.Remove(s.idx.String())
return nil
}