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package abstract_sql
import (
"context"
"database/sql"
"encoding/base64"
"fmt"
"strings"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/util/log"
"github.com/chrislusf/seaweedfs/weed/util"
)
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 {
if !strings.Contains(strings.ToLower(err.Error()), "duplicate") {
return fmt.Errorf("kv insert: %s", err)
}
}
// now the insert failed possibly due to duplication constraints
log.Debugf("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
}
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