mirror of
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106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
package abstract_sql
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import (
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"context"
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"database/sql"
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"encoding/base64"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/filer"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/util"
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"strings"
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)
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func (store *AbstractSqlStore) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
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db, _, _, err := store.getTxOrDB(ctx, "", false)
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if err != nil {
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return fmt.Errorf("findDB: %v", err)
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}
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dirStr, dirHash, name := GenDirAndName(key)
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res, err := db.ExecContext(ctx, store.GetSqlInsert(DEFAULT_TABLE), dirHash, name, dirStr, value)
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if err == nil {
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return
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}
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if !strings.Contains(strings.ToLower(err.Error()), "duplicate") {
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// return fmt.Errorf("kv insert: %s", err)
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// skip this since the error can be in a different language
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}
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// now the insert failed possibly due to duplication constraints
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glog.V(1).Infof("kv insert falls back to update: %s", err)
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res, err = db.ExecContext(ctx, store.GetSqlUpdate(DEFAULT_TABLE), value, dirHash, name, dirStr)
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if err != nil {
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return fmt.Errorf("kv upsert: %s", err)
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}
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_, err = res.RowsAffected()
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if err != nil {
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return fmt.Errorf("kv upsert no rows affected: %s", err)
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}
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return nil
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}
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func (store *AbstractSqlStore) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
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db, _, _, err := store.getTxOrDB(ctx, "", false)
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if err != nil {
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return nil, fmt.Errorf("findDB: %v", err)
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}
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dirStr, dirHash, name := GenDirAndName(key)
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row := db.QueryRowContext(ctx, store.GetSqlFind(DEFAULT_TABLE), dirHash, name, dirStr)
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err = row.Scan(&value)
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if err == sql.ErrNoRows {
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return nil, filer.ErrKvNotFound
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}
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if err != nil {
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return nil, fmt.Errorf("kv get: %v", err)
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}
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return
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}
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func (store *AbstractSqlStore) KvDelete(ctx context.Context, key []byte) (err error) {
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db, _, _, err := store.getTxOrDB(ctx, "", false)
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if err != nil {
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return fmt.Errorf("findDB: %v", err)
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}
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dirStr, dirHash, name := GenDirAndName(key)
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res, err := db.ExecContext(ctx, store.GetSqlDelete(DEFAULT_TABLE), dirHash, name, dirStr)
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if err != nil {
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return fmt.Errorf("kv delete: %s", err)
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}
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_, err = res.RowsAffected()
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if err != nil {
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return fmt.Errorf("kv delete no rows affected: %s", err)
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}
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return nil
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}
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func GenDirAndName(key []byte) (dirStr string, dirHash int64, name string) {
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for len(key) < 8 {
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key = append(key, 0)
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}
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dirHash = int64(util.BytesToUint64(key[:8]))
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dirStr = base64.StdEncoding.EncodeToString(key[:8])
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name = base64.StdEncoding.EncodeToString(key[8:])
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return
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}
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