mirror of
https://github.com/seaweedfs/seaweedfs.git
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136 lines
3.4 KiB
Go
136 lines
3.4 KiB
Go
package abstract_sql
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import (
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"database/sql"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
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)
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type AbstractSqlStore struct {
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DB *sql.DB
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SqlInsert string
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SqlUpdate string
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SqlFind string
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SqlDelete string
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SqlListExclusive string
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SqlListInclusive string
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}
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func (store *AbstractSqlStore) InsertEntry(entry *filer2.Entry) (err error) {
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dir, name := entry.FullPath.DirAndName()
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meta, err := entry.EncodeAttributesAndChunks()
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if err != nil {
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return fmt.Errorf("encode %s: %s", entry.FullPath, err)
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}
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res, err := store.DB.Exec(store.SqlInsert, hashToLong(dir), name, dir, meta)
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if err != nil {
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return fmt.Errorf("insert %s: %s", entry.FullPath, 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("insert %s but no rows affected: %s", entry.FullPath, err)
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}
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return nil
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}
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func (store *AbstractSqlStore) UpdateEntry(entry *filer2.Entry) (err error) {
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dir, name := entry.FullPath.DirAndName()
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meta, err := entry.EncodeAttributesAndChunks()
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if err != nil {
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return fmt.Errorf("encode %s: %s", entry.FullPath, err)
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}
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res, err := store.DB.Exec(store.SqlUpdate, meta, hashToLong(dir), name, dir)
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if err != nil {
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return fmt.Errorf("update %s: %s", entry.FullPath, 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("update %s but no rows affected: %s", entry.FullPath, err)
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}
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return nil
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}
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func (store *AbstractSqlStore) FindEntry(fullpath filer2.FullPath) (*filer2.Entry, error) {
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dir, name := fullpath.DirAndName()
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row := store.DB.QueryRow(store.SqlFind, hashToLong(dir), name, dir)
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var data []byte
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if err := row.Scan(&data); err != nil {
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return nil, fmt.Errorf("read entry %s: %v", fullpath, err)
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}
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entry := &filer2.Entry{
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FullPath: fullpath,
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}
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if err := entry.DecodeAttributesAndChunks(data); err != nil {
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return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
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}
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return entry, nil
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}
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func (store *AbstractSqlStore) DeleteEntry(fullpath filer2.FullPath) (*filer2.Entry, error) {
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entry, err := store.FindEntry(fullpath)
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if err != nil {
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return nil, nil
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}
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dir, name := fullpath.DirAndName()
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res, err := store.DB.Exec(store.SqlDelete, hashToLong(dir), name, dir)
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if err != nil {
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return nil, fmt.Errorf("delete %s: %s", fullpath, err)
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}
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_, err = res.RowsAffected()
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if err != nil {
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return nil, fmt.Errorf("delete %s but no rows affected: %s", fullpath, err)
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}
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return entry, nil
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}
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func (store *AbstractSqlStore) ListDirectoryEntries(fullpath filer2.FullPath, startFileName string, inclusive bool, limit int) (entries []*filer2.Entry, err error) {
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sqlText := store.SqlListExclusive
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if inclusive {
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sqlText = store.SqlListInclusive
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}
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rows, err := store.DB.Query(sqlText, hashToLong(string(fullpath)), startFileName, string(fullpath), limit)
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if err != nil {
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return nil, fmt.Errorf("list %s : %v", fullpath, err)
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}
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defer rows.Close()
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for rows.Next() {
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var name string
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var data []byte
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if err = rows.Scan(&name, &data); err != nil {
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glog.V(0).Infof("scan %s : %v", fullpath, err)
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return nil, fmt.Errorf("scan %s: %v", fullpath, err)
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}
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entry := &filer2.Entry{
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FullPath: filer2.NewFullPath(string(fullpath), name),
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}
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if err = entry.DecodeAttributesAndChunks(data); err != nil {
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glog.V(0).Infof("scan decode %s : %v", entry.FullPath, err)
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return nil, fmt.Errorf("scan decode %s : %v", entry.FullPath, err)
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}
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entries = append(entries, entry)
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}
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return entries, nil
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}
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