package redis_lua import ( "context" "fmt" "time" "github.com/go-redis/redis/v8" "github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/filer/redis_lua/stored_procedure" "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 UniversalRedisLuaStore struct { Client redis.UniversalClient superLargeDirectoryHash map[string]bool } func (store *UniversalRedisLuaStore) isSuperLargeDirectory(dir string) (isSuperLargeDirectory bool) { _, isSuperLargeDirectory = store.superLargeDirectoryHash[dir] return } func (store *UniversalRedisLuaStore) loadSuperLargeDirectories(superLargeDirectories []string) { // set directory hash store.superLargeDirectoryHash = make(map[string]bool) for _, dir := range superLargeDirectories { store.superLargeDirectoryHash[dir] = true } } func (store *UniversalRedisLuaStore) BeginTransaction(ctx context.Context) (context.Context, error) { return ctx, nil } func (store *UniversalRedisLuaStore) CommitTransaction(ctx context.Context) error { return nil } func (store *UniversalRedisLuaStore) RollbackTransaction(ctx context.Context) error { return nil } func (store *UniversalRedisLuaStore) 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) > 50 { value = util.MaybeGzipData(value) } dir, name := entry.FullPath.DirAndName() err = stored_procedure.InsertEntryScript.Run(ctx, store.Client, []string{string(entry.FullPath), genDirectoryListKey(dir)}, value, entry.TtlSec, store.isSuperLargeDirectory(dir), 0, name).Err() if err != nil { return fmt.Errorf("persisting %s : %v", entry.FullPath, err) } return nil } func (store *UniversalRedisLuaStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) { return store.InsertEntry(ctx, entry) } func (store *UniversalRedisLuaStore) 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 *UniversalRedisLuaStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) { dir, name := fullpath.DirAndName() err = stored_procedure.DeleteEntryScript.Run(ctx, store.Client, []string{string(fullpath), genDirectoryListKey(string(fullpath)), genDirectoryListKey(dir)}, store.isSuperLargeDirectory(dir), name).Err() if err != nil { return fmt.Errorf("DeleteEntry %s : %v", fullpath, err) } return nil } func (store *UniversalRedisLuaStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) { if store.isSuperLargeDirectory(string(fullpath)) { return nil } err = stored_procedure.DeleteFolderChildrenScript.Run(ctx, store.Client, []string{string(fullpath)}).Err() if err != nil { return fmt.Errorf("DeleteFolderChildren %s : %v", fullpath, err) } return nil } func (store *UniversalRedisLuaStore) 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 *UniversalRedisLuaStore) 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.DeleteEntry(ctx, path) continue } } if !eachEntryFunc(entry) { break } } } return lastFileName, err } func genDirectoryListKey(dir string) (dirList string) { return dir + DIR_LIST_MARKER } func (store *UniversalRedisLuaStore) Shutdown() { store.Client.Close() }