mirror of
https://github.com/seaweedfs/seaweedfs.git
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122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
package abstract_sql
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import (
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"fmt"
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"database/sql"
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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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}
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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("mysql encode %s: %s", entry.FullPath, err)
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}
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res, err := store.DB.Exec("INSERT INTO seaweedfs (directory,name,meta) VALUES(?,?,?)", dir, name, meta)
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if err != nil {
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return fmt.Errorf("mysql 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("mysql 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("mysql encode %s: %s", entry.FullPath, err)
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}
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res, err := store.DB.Exec("UPDATE seaweedfs SET meta=? WHERE directory=? and name=?", dir, name, meta)
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if err != nil {
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return fmt.Errorf("mysql 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("mysql 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("SELECT meta FROM seaweedfs WHERE directory=? and name=?", dir, name)
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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("mysql 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("mysql 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, _ := store.FindEntry(fullpath)
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dir, name := fullpath.DirAndName()
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res, err := store.DB.Exec("DELETE FROM seaweedfs WHERE directory=? and name=?", dir, name)
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if err != nil {
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return nil, fmt.Errorf("mysql 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("mysql 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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rows, err := store.DB.Query("SELECT NAME, meta FROM seaweedfs WHERE directory=? and name>?", fullpath, startFileName)
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if err != nil {
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return nil, fmt.Errorf("mysql 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("mysql scan %s : %v", fullpath, err)
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return nil, fmt.Errorf("mysql scan %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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glog.V(0).Infof("mysql scan decode %s : %v", entry.FullPath, err)
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return nil, fmt.Errorf("mysql 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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