package filer2 import ( "bytes" "fmt" "io" "math" "github.com/golang/protobuf/proto" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" ) const ( ManifestBatch = 1000 ) func HasChunkManifest(chunks []*filer_pb.FileChunk) bool { for _, chunk := range chunks { if chunk.IsChunkManifest { return true } } return false } func ResolveChunkManifest(lookupFileIdFn LookupFileIdFunctionType, chunks []*filer_pb.FileChunk) (dataChunks, manifestChunks []*filer_pb.FileChunk, manefestResolveErr error) { // TODO maybe parallel this for _, chunk := range chunks { if !chunk.IsChunkManifest { dataChunks = append(dataChunks, chunk) continue } // IsChunkManifest data, err := fetchChunk(lookupFileIdFn, chunk.FileId, chunk.CipherKey, chunk.IsCompressed) if err != nil { return chunks, nil, fmt.Errorf("fail to read manifest %s: %v", chunk.FileId, err) } m := &filer_pb.FileChunkManifest{} if err := proto.Unmarshal(data, m); err != nil { return chunks, nil, fmt.Errorf("fail to unmarshal manifest %s: %v", chunk.FileId, err) } manifestChunks = append(manifestChunks, chunk) // recursive filer_pb.AfterEntryDeserialization(m.Chunks) dchunks, mchunks, subErr := ResolveChunkManifest(lookupFileIdFn, m.Chunks) if subErr != nil { return chunks, nil, subErr } dataChunks = append(dataChunks, dchunks...) manifestChunks = append(manifestChunks, mchunks...) } return } // TODO fetch from cache for weed mount? func fetchChunk(lookupFileIdFn LookupFileIdFunctionType, fileId string, cipherKey []byte, isGzipped bool) ([]byte, error) { urlString, err := lookupFileIdFn(fileId) if err != nil { glog.Errorf("operation LookupFileId %s failed, err: %v", fileId, err) return nil, err } var buffer bytes.Buffer err = util.ReadUrlAsStream(urlString+"?readDeleted=true", cipherKey, isGzipped, true, 0, 0, func(data []byte) { buffer.Write(data) }) if err != nil { glog.V(0).Infof("read %s failed, err: %v", fileId, err) return nil, err } return buffer.Bytes(), nil } func MaybeManifestize(saveFunc SaveDataAsChunkFunctionType, inputChunks []*filer_pb.FileChunk) (chunks []*filer_pb.FileChunk, err error) { return doMaybeManifestize(saveFunc, inputChunks, ManifestBatch, mergeIntoManifest) } func doMaybeManifestize(saveFunc SaveDataAsChunkFunctionType, inputChunks []*filer_pb.FileChunk, mergeFactor int, mergefn func(saveFunc SaveDataAsChunkFunctionType, dataChunks []*filer_pb.FileChunk) (manifestChunk *filer_pb.FileChunk, err error)) (chunks []*filer_pb.FileChunk, err error) { var dataChunks []*filer_pb.FileChunk for _, chunk := range inputChunks { if !chunk.IsChunkManifest { dataChunks = append(dataChunks, chunk) } else { chunks = append(chunks, chunk) } } remaining := len(dataChunks) for i := 0; i+mergeFactor <= len(dataChunks); i += mergeFactor { chunk, err := mergefn(saveFunc, dataChunks[i:i+mergeFactor]) if err != nil { return dataChunks, err } chunks = append(chunks, chunk) remaining -= mergeFactor } // remaining for i := len(dataChunks) - remaining; i < len(dataChunks); i++ { chunks = append(chunks, dataChunks[i]) } return } func mergeIntoManifest(saveFunc SaveDataAsChunkFunctionType, dataChunks []*filer_pb.FileChunk) (manifestChunk *filer_pb.FileChunk, err error) { filer_pb.BeforeEntrySerialization(dataChunks) // create and serialize the manifest data, serErr := proto.Marshal(&filer_pb.FileChunkManifest{ Chunks: dataChunks, }) if serErr != nil { return nil, fmt.Errorf("serializing manifest: %v", serErr) } minOffset, maxOffset := int64(math.MaxInt64), int64(math.MinInt64) for _, chunk := range dataChunks { if minOffset > int64(chunk.Offset) { minOffset = chunk.Offset } if maxOffset < int64(chunk.Size)+chunk.Offset { maxOffset = int64(chunk.Size) + chunk.Offset } } manifestChunk, _, _, err = saveFunc(bytes.NewReader(data), "", 0) if err != nil { return nil, err } manifestChunk.IsChunkManifest = true manifestChunk.Offset = minOffset manifestChunk.Size = uint64(maxOffset - minOffset) return } type SaveDataAsChunkFunctionType func(reader io.Reader, name string, offset int64) (chunk *filer_pb.FileChunk, collection, replication string, err error)