package redis import ( "context" "fmt" "golang.org/x/exp/slices" "strings" "time" "github.com/go-redis/redis/v8" "github.com/seaweedfs/seaweedfs/weed/filer" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/util" ) const ( DIR_LIST_MARKER = "\x00" ) type UniversalRedisStore struct { Client redis.UniversalClient } func (store *UniversalRedisStore) BeginTransaction(ctx context.Context) (context.Context, error) { return ctx, nil } func (store *UniversalRedisStore) CommitTransaction(ctx context.Context) error { return nil } func (store *UniversalRedisStore) RollbackTransaction(ctx context.Context) error { return nil } func (store *UniversalRedisStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) { if err = store.doInsertEntry(ctx, entry); err != nil { return err } dir, name := entry.FullPath.DirAndName() if name != "" { _, err = store.Client.SAdd(ctx, genDirectoryListKey(dir), name).Result() if err != nil { return fmt.Errorf("persisting %s in parent dir: %v", entry.FullPath, err) } } return nil } func (store *UniversalRedisStore) doInsertEntry(ctx context.Context, entry *filer.Entry) error { value, err := entry.EncodeAttributesAndChunks() if err != nil { return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err) } if len(entry.GetChunks()) > filer.CountEntryChunksForGzip { value = util.MaybeGzipData(value) } _, err = store.Client.Set(ctx, string(entry.FullPath), value, time.Duration(entry.TtlSec)*time.Second).Result() if err != nil { return fmt.Errorf("persisting %s : %v", entry.FullPath, err) } return nil } func (store *UniversalRedisStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) { return store.doInsertEntry(ctx, entry) } func (store *UniversalRedisStore) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer.Entry, err error) { data, err := store.Client.Get(ctx, string(fullpath)).Result() if err == redis.Nil { return nil, filer_pb.ErrNotFound } if err != nil { return nil, fmt.Errorf("get %s : %v", fullpath, err) } entry = &filer.Entry{ FullPath: fullpath, } err = entry.DecodeAttributesAndChunks(util.MaybeDecompressData([]byte(data))) if err != nil { return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err) } return entry, nil } func (store *UniversalRedisStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) { _, err = store.Client.Del(ctx, string(fullpath)).Result() if err != nil { return fmt.Errorf("delete %s : %v", fullpath, err) } dir, name := fullpath.DirAndName() if name != "" { _, err = store.Client.SRem(ctx, genDirectoryListKey(dir), name).Result() if err != nil { return fmt.Errorf("delete %s in parent dir: %v", fullpath, err) } } return nil } func (store *UniversalRedisStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) { members, err := store.Client.SMembers(ctx, genDirectoryListKey(string(fullpath))).Result() if err != nil { return fmt.Errorf("delete folder %s : %v", fullpath, err) } for _, fileName := range members { path := util.NewFullPath(string(fullpath), fileName) _, err = store.Client.Del(ctx, string(path)).Result() if err != nil { return fmt.Errorf("delete %s in parent dir: %v", fullpath, err) } // not efficient, but need to remove if it is a directory store.Client.Del(ctx, genDirectoryListKey(string(path))) } return nil } func (store *UniversalRedisStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { return lastFileName, filer.ErrUnsupportedListDirectoryPrefixed } func (store *UniversalRedisStore) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { dirListKey := genDirectoryListKey(string(dirPath)) members, err := store.Client.SMembers(ctx, dirListKey).Result() if err != nil { return lastFileName, fmt.Errorf("list %s : %v", dirPath, err) } // skip if startFileName != "" { var t []string for _, m := range members { if strings.Compare(m, startFileName) >= 0 { if m == startFileName { if includeStartFile { t = append(t, m) } } else { t = append(t, m) } } } members = t } // sort slices.SortFunc(members, func(a, b string) int { return strings.Compare(a, b) }) // limit if limit < int64(len(members)) { members = members[:limit] } // fetch entry meta for _, fileName := range members { path := util.NewFullPath(string(dirPath), fileName) entry, err := store.FindEntry(ctx, path) lastFileName = fileName if err != nil { glog.V(0).Infof("list %s : %v", path, err) if err == filer_pb.ErrNotFound { continue } } else { if entry.TtlSec > 0 { if entry.Attr.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) { store.Client.Del(ctx, string(path)).Result() store.Client.SRem(ctx, dirListKey, fileName).Result() continue } } if !eachEntryFunc(entry) { break } } } return lastFileName, err } func genDirectoryListKey(dir string) (dirList string) { return dir + DIR_LIST_MARKER } func (store *UniversalRedisStore) Shutdown() { store.Client.Close() }