mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-02 09:31:38 +02:00
89 lines
2.1 KiB
Go
89 lines
2.1 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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"strings"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/util/log"
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"github.com/chrislusf/seaweedfs/weed/util"
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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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dirStr, dirHash, name := genDirAndName(key)
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res, err := store.getTxOrDB(ctx).ExecContext(ctx, store.SqlInsert, dirHash, name, dirStr, value)
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if err != nil {
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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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}
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}
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// now the insert failed possibly due to duplication constraints
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log.Debugf("kv insert falls back to update: %s", err)
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res, err = store.getTxOrDB(ctx).ExecContext(ctx, store.SqlUpdate, 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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dirStr, dirHash, name := genDirAndName(key)
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row := store.getTxOrDB(ctx).QueryRowContext(ctx, store.SqlFind, 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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dirStr, dirHash, name := genDirAndName(key)
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res, err := store.getTxOrDB(ctx).ExecContext(ctx, store.SqlDelete, 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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