/
codec_v1.go
217 lines (199 loc) · 6.23 KB
/
codec_v1.go
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package apicodec
import (
"github.com/pingcap/errors"
"github.com/pingcap/kvproto/pkg/errorpb"
"github.com/pingcap/kvproto/pkg/kvrpcpb"
"github.com/tikv/client-go/v2/tikvrpc"
)
type codecV1 struct {
memCodec memCodec
}
// NewCodecV1 returns a codec that can be used to encode/decode
// keys and requests to and from APIv1 format.
func NewCodecV1(mode Mode) Codec {
switch mode {
case ModeRaw:
return &codecV1{memCodec: &defaultMemCodec{}}
case ModeTxn:
return &codecV1{memCodec: &memComparableCodec{}}
}
panic("unknown mode")
}
func (c *codecV1) GetAPIVersion() kvrpcpb.APIVersion {
return kvrpcpb.APIVersion_V1
}
func (c *codecV1) GetKeyspace() []byte {
return nil
}
func (c *codecV1) GetKeyspaceID() KeyspaceID {
return NullspaceID
}
func (c *codecV1) EncodeRequest(req *tikvrpc.Request) (*tikvrpc.Request, error) {
return attachAPICtx(c, req), nil
}
func (c *codecV1) DecodeResponse(req *tikvrpc.Request, resp *tikvrpc.Response) (*tikvrpc.Response, error) {
regionError, err := resp.GetRegionError()
// If GetRegionError returns error, it means the response does not contain region error to decode,
// therefore we skip decoding and return the response as is.
if err != nil {
return resp, nil
}
decodeRegionError, err := c.decodeRegionError(regionError)
if err != nil {
return nil, err
}
switch req.Type {
case tikvrpc.CmdGet:
r := resp.Resp.(*kvrpcpb.GetResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdScan:
r := resp.Resp.(*kvrpcpb.ScanResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdPrewrite:
r := resp.Resp.(*kvrpcpb.PrewriteResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdCommit:
r := resp.Resp.(*kvrpcpb.CommitResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdCleanup:
r := resp.Resp.(*kvrpcpb.CleanupResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdBatchGet:
r := resp.Resp.(*kvrpcpb.BatchGetResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdBatchRollback:
r := resp.Resp.(*kvrpcpb.BatchRollbackResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdScanLock:
r := resp.Resp.(*kvrpcpb.ScanLockResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdResolveLock:
r := resp.Resp.(*kvrpcpb.ResolveLockResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdGC:
r := resp.Resp.(*kvrpcpb.GCResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdDeleteRange:
r := resp.Resp.(*kvrpcpb.DeleteRangeResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdPessimisticLock:
r := resp.Resp.(*kvrpcpb.PessimisticLockResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdPessimisticRollback:
r := resp.Resp.(*kvrpcpb.PessimisticRollbackResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdTxnHeartBeat:
r := resp.Resp.(*kvrpcpb.TxnHeartBeatResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdCheckTxnStatus:
r := resp.Resp.(*kvrpcpb.CheckTxnStatusResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdCheckSecondaryLocks:
r := resp.Resp.(*kvrpcpb.CheckSecondaryLocksResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawGet:
r := resp.Resp.(*kvrpcpb.RawGetResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawBatchGet:
r := resp.Resp.(*kvrpcpb.RawBatchGetResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawPut:
r := resp.Resp.(*kvrpcpb.RawPutResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawBatchPut:
r := resp.Resp.(*kvrpcpb.RawBatchPutResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawDelete:
r := resp.Resp.(*kvrpcpb.RawDeleteResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawBatchDelete:
r := resp.Resp.(*kvrpcpb.RawBatchDeleteResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawDeleteRange:
r := resp.Resp.(*kvrpcpb.RawDeleteRangeResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawScan:
r := resp.Resp.(*kvrpcpb.RawScanResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdGetKeyTTL:
r := resp.Resp.(*kvrpcpb.RawGetKeyTTLResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawCompareAndSwap:
r := resp.Resp.(*kvrpcpb.RawCASResponse)
r.RegionError = decodeRegionError
case tikvrpc.CmdRawChecksum:
r := resp.Resp.(*kvrpcpb.RawChecksumResponse)
r.RegionError = decodeRegionError
}
return resp, nil
}
func (c *codecV1) EncodeRegionKey(key []byte) []byte {
return c.memCodec.encodeKey(key)
}
func (c *codecV1) DecodeRegionKey(encodedKey []byte) ([]byte, error) {
if len(encodedKey) == 0 {
return encodedKey, nil
}
return c.memCodec.decodeKey(encodedKey)
}
func (c *codecV1) EncodeRegionRange(start, end []byte) ([]byte, []byte) {
if len(end) > 0 {
return c.EncodeRegionKey(start), c.EncodeRegionKey(end)
}
return c.EncodeRegionKey(start), end
}
func (c *codecV1) DecodeRegionRange(encodedStart, encodedEnd []byte) ([]byte, []byte, error) {
start, err := c.DecodeRegionKey(encodedStart)
if err != nil {
return nil, nil, err
}
end, err := c.DecodeRegionKey(encodedEnd)
if err != nil {
return nil, nil, err
}
return start, end, nil
}
func (c *codecV1) decodeRegionError(regionError *errorpb.Error) (*errorpb.Error, error) {
if regionError == nil {
return nil, nil
}
var err error
if errInfo := regionError.KeyNotInRegion; errInfo != nil {
errInfo.StartKey, errInfo.EndKey, err = c.DecodeRegionRange(errInfo.StartKey, errInfo.EndKey)
if err != nil {
return nil, err
}
}
if errInfo := regionError.EpochNotMatch; errInfo != nil {
for _, meta := range errInfo.CurrentRegions {
meta.StartKey, meta.EndKey, err = c.DecodeRegionRange(meta.StartKey, meta.EndKey)
if err != nil {
return nil, err
}
}
}
return regionError, nil
}
func (c *codecV1) EncodeKey(key []byte) []byte {
return key
}
func (c *codecV1) EncodeRange(start, end []byte) ([]byte, []byte) {
return start, end
}
func (c *codecV1) DecodeRange(start, end []byte) ([]byte, []byte, error) {
return start, end, nil
}
func (c *codecV1) DecodeKey(key []byte) ([]byte, error) {
return key, nil
}
func (c *codecV1) DecodeBucketKeys(keys [][]byte) ([][]byte, error) {
ks := make([][]byte, 0, len(keys))
for _, key := range keys {
k, err := c.DecodeRegionKey(key)
if err != nil {
return nil, errors.Trace(err)
}
ks = append(ks, k)
}
return ks, nil
}