mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package abstract_sql
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"github.com/chrislusf/seaweedfs/weed/filer"
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
"strings"
|
|
)
|
|
|
|
func (store *AbstractSqlStore) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
|
|
|
|
dirStr, dirHash, name := genDirAndName(key)
|
|
|
|
res, err := store.getTxOrDB(ctx).ExecContext(ctx, store.SqlInsert, dirHash, name, dirStr, value)
|
|
if err == nil {
|
|
return
|
|
}
|
|
|
|
if !strings.Contains(strings.ToLower(err.Error()), "duplicate") {
|
|
// return fmt.Errorf("kv insert: %s", err)
|
|
// skip this since the error can be in a different language
|
|
}
|
|
|
|
// now the insert failed possibly due to duplication constraints
|
|
glog.V(1).Infof("kv insert falls back to update: %s", err)
|
|
|
|
res, err = store.getTxOrDB(ctx).ExecContext(ctx, store.SqlUpdate, value, dirHash, name, dirStr)
|
|
if err != nil {
|
|
return fmt.Errorf("kv upsert: %s", err)
|
|
}
|
|
|
|
_, err = res.RowsAffected()
|
|
if err != nil {
|
|
return fmt.Errorf("kv upsert no rows affected: %s", err)
|
|
}
|
|
return nil
|
|
|
|
}
|
|
|
|
func (store *AbstractSqlStore) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
|
|
|
|
dirStr, dirHash, name := genDirAndName(key)
|
|
row := store.getTxOrDB(ctx).QueryRowContext(ctx, store.SqlFind, dirHash, name, dirStr)
|
|
|
|
err = row.Scan(&value)
|
|
|
|
if err == sql.ErrNoRows {
|
|
return nil, filer.ErrKvNotFound
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("kv get: %v", err)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (store *AbstractSqlStore) KvDelete(ctx context.Context, key []byte) (err error) {
|
|
|
|
dirStr, dirHash, name := genDirAndName(key)
|
|
|
|
res, err := store.getTxOrDB(ctx).ExecContext(ctx, store.SqlDelete, dirHash, name, dirStr)
|
|
if err != nil {
|
|
return fmt.Errorf("kv delete: %s", err)
|
|
}
|
|
|
|
_, err = res.RowsAffected()
|
|
if err != nil {
|
|
return fmt.Errorf("kv delete no rows affected: %s", err)
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func genDirAndName(key []byte) (dirStr string, dirHash int64, name string) {
|
|
for len(key) < 8 {
|
|
key = append(key, 0)
|
|
}
|
|
|
|
dirHash = int64(util.BytesToUint64(key[:8]))
|
|
dirStr = base64.StdEncoding.EncodeToString(key[:8])
|
|
name = base64.StdEncoding.EncodeToString(key[8:])
|
|
|
|
return
|
|
}
|