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rawkv_client.go
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rawkv_client.go
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package client
import (
"bytes"
"context"
"errors"
"fmt"
"github.com/c4pt0r/log"
"github.com/c4pt0r/tcli"
"github.com/c4pt0r/tcli/utils"
"github.com/tikv/client-go/v2/config"
"github.com/tikv/client-go/v2/rawkv"
pd "github.com/tikv/pd/client"
)
var MaxRawKVScanLimit = 10240
func newRawKVClient(pdAddr []string) *rawkvClient {
client, err := rawkv.NewClient(context.TODO(), pdAddr, config.DefaultConfig().Security)
if err != nil {
log.F(err)
}
return &rawkvClient{
rawClient: client,
pdAddr: pdAddr,
}
}
type rawkvClient struct {
rawClient *rawkv.Client
pdAddr []string
}
func (c *rawkvClient) Close() {
if c.rawClient != nil {
c.rawClient.Close()
}
}
func (c *rawkvClient) GetClientMode() TiKV_MODE {
return RAW_CLIENT
}
func (c *rawkvClient) GetClusterID() string {
return fmt.Sprintf("%d", c.rawClient.ClusterID())
}
func (c *rawkvClient) GetStores() ([]StoreInfo, error) {
panic("rawkvClient does not support GetStores()")
}
func (c *rawkvClient) GetPDs() ([]PDInfo, error) {
panic("rawkvClient does not support GetPDs()")
}
func (c *rawkvClient) GetPDClient() pd.Client {
panic("rawkvClient does not support GetPDClient()")
}
func (c *rawkvClient) Put(ctx context.Context, kv KV) error {
return c.rawClient.Put(context.TODO(), kv.K, kv.V)
}
func (c *rawkvClient) BatchPut(ctx context.Context, kvs []KV) error {
for _, kv := range kvs {
err := c.rawClient.Put(context.TODO(), kv.K[:], kv.V[:])
if err != nil {
return err
}
}
return nil
}
func (c *rawkvClient) Get(ctx context.Context, k Key) (KV, error) {
v, err := c.rawClient.Get(context.TODO(), k)
if err != nil {
return KV{}, err
}
if v == nil {
return KV{}, errors.New("key not found")
}
return KV{k, v}, nil
}
func (c *rawkvClient) Scan(ctx context.Context, prefix []byte) (KVS, int, error) {
scanOpts := utils.PropFromContext(ctx)
strictPrefix := scanOpts.GetBool(tcli.ScanOptStrictPrefix, false)
countOnly := scanOpts.GetBool(tcli.ScanOptCountOnly, false)
keyOnly := scanOpts.GetBool(tcli.ScanOptKeyOnly, false)
// count only mode will ignore this
limit := scanOpts.GetInt(tcli.ScanOptLimit, 100)
if countOnly {
// BUG, TODO
limit = MaxRawKVScanLimit
}
keys, values, err := c.rawClient.Scan(ctx, prefix, []byte{}, limit)
if err != nil {
return nil, 0, err
}
var ret []KV
var lastKey KV
count := 0
for i := 0; i < len(keys); i++ {
if strictPrefix && !bytes.HasPrefix(keys[i], prefix) {
break
}
if !countOnly {
if keyOnly {
ret = append(ret, KV{K: keys[i], V: nil})
} else {
ret = append(ret, KV{K: keys[i], V: values[i]})
}
}
count++
lastKey.K = keys[i]
}
if countOnly {
ret = append(ret, KV{K: []byte("Count"), V: []byte(fmt.Sprintf("%d", count))})
ret = append(ret, KV{K: []byte("Last Key"), V: []byte(lastKey.K)})
}
return ret, count, nil
}
func (c *rawkvClient) Delete(ctx context.Context, k Key) error {
err := c.rawClient.Delete(context.TODO(), []byte(k))
return err
}
func (c *rawkvClient) BatchDelete(ctx context.Context, kvs []KV) error {
keys := [][]byte{}
for _, kv := range kvs {
keys = append(keys, []byte(kv.K))
}
return c.rawClient.BatchDelete(context.TODO(), keys)
}
func (c *rawkvClient) DeletePrefix(ctx context.Context, prefix Key, limit int) (Key, int, error) {
endKey := []byte(prefix)
endKey[len(endKey)] += 0x1
keys, _, err := c.rawClient.Scan(ctx, prefix, endKey, MaxRawKVScanLimit)
if err != nil {
return nil, 0, err
}
lastKey := Key(keys[len(keys)-1])
return lastKey, len(keys), c.rawClient.BatchDelete(context.TODO(), keys)
}