package redis2 import ( "context" "fmt" "time" "github.com/go-redis/redis/v8" "github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" ) const ( DIR_LIST_MARKER = "\x00" ) type UniversalRedis2Store struct { Client redis.UniversalClient superLargeDirectoryHash map[string]bool } func (store *UniversalRedis2Store) isSuperLargeDirectory(dir string) (isSuperLargeDirectory bool) { _, isSuperLargeDirectory = store.superLargeDirectoryHash[dir] return } func (store *UniversalRedis2Store) loadSuperLargeDirectories(superLargeDirectories []string) { // set directory hash store.superLargeDirectoryHash = make(map[string]bool) for _, dir := range superLargeDirectories { store.superLargeDirectoryHash[dir] = true } } func (store *UniversalRedis2Store) BeginTransaction(ctx context.Context) (context.Context, error) { return ctx, nil } func (store *UniversalRedis2Store) CommitTransaction(ctx context.Context) error { return nil } func (store *UniversalRedis2Store) RollbackTransaction(ctx context.Context) error { return nil } func (store *UniversalRedis2Store) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) { value, err := entry.EncodeAttributesAndChunks() if err != nil { return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err) } if len(entry.Chunks) > filer.CountEntryChunksForGzip { value = util.MaybeGzipData(value) } if err = store.Client.Set(ctx, string(entry.FullPath), value, time.Duration(entry.TtlSec)*time.Second).Err(); err != nil { return fmt.Errorf("persisting %s : %v", entry.FullPath, err) } dir, name := entry.FullPath.DirAndName() if store.isSuperLargeDirectory(dir) { return nil } if name != "" { if err = store.Client.ZAddNX(ctx, genDirectoryListKey(dir), &redis.Z{Score: 0, Member: name}).Err(); err != nil { return fmt.Errorf("persisting %s in parent dir: %v", entry.FullPath, err) } } return nil } func (store *UniversalRedis2Store) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) { return store.InsertEntry(ctx, entry) } func (store *UniversalRedis2Store) 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 *UniversalRedis2Store) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) { _, err = store.Client.Del(ctx, genDirectoryListKey(string(fullpath))).Result() if err != nil { return fmt.Errorf("delete dir list %s : %v", fullpath, err) } _, err = store.Client.Del(ctx, string(fullpath)).Result() if err != nil { return fmt.Errorf("delete %s : %v", fullpath, err) } dir, name := fullpath.DirAndName() if store.isSuperLargeDirectory(dir) { return nil } if name != "" { _, err = store.Client.ZRem(ctx, genDirectoryListKey(dir), name).Result() if err != nil { return fmt.Errorf("DeleteEntry %s in parent dir: %v", fullpath, err) } } return nil } func (store *UniversalRedis2Store) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) { if store.isSuperLargeDirectory(string(fullpath)) { return nil } members, err := store.Client.ZRangeByLex(ctx, genDirectoryListKey(string(fullpath)), &redis.ZRangeBy{ Min: "-", Max: "+", }).Result() if err != nil { return fmt.Errorf("DeleteFolderChildren %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("DeleteFolderChildren %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 *UniversalRedis2Store) 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 *UniversalRedis2Store) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { dirListKey := genDirectoryListKey(string(dirPath)) min := "-" if startFileName != "" { if includeStartFile { min = "[" + startFileName } else { min = "(" + startFileName } } members, err := store.Client.ZRangeByLex(ctx, dirListKey, &redis.ZRangeBy{ Min: min, Max: "+", Offset: 0, Count: limit, }).Result() if err != nil { return lastFileName, fmt.Errorf("list %s : %v", dirPath, err) } // 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.ZRem(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 *UniversalRedis2Store) Shutdown() { store.Client.Close() }