package weed_server import ( "context" "fmt" "io" "os" "github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb" "github.com/chrislusf/seaweedfs/weed/storage" ) func (vs *VolumeServer) VolumeFollow(req *volume_server_pb.VolumeFollowRequest, stream volume_server_pb.VolumeServer_VolumeFollowServer) error { v := vs.store.GetVolume(storage.VolumeId(req.VolumeId)) if v == nil { return fmt.Errorf("not found volume id %d", req.VolumeId) } stopOffset := v.Size() foundOffset, isLastOne, err := v.BinarySearchByAppendAtNs(req.Since) if err != nil { return fmt.Errorf("fail to locate by appendAtNs %d: %s", req.Since, err) } if isLastOne { return nil } startOffset := foundOffset.ToAcutalOffset() buf := make([]byte, 1024*1024*2) return sendFileContent(v.DataFile(), buf, startOffset, stopOffset, stream) } func (vs *VolumeServer) VolumeSyncStatus(ctx context.Context, req *volume_server_pb.VolumeSyncStatusRequest) (*volume_server_pb.VolumeSyncStatusResponse, error) { v := vs.store.GetVolume(storage.VolumeId(req.VolumeId)) if v == nil { return nil, fmt.Errorf("not found volume id %d", req.VolumeId) } resp := v.GetVolumeSyncStatus() return resp, nil } func sendFileContent(datFile *os.File, buf []byte, startOffset, stopOffset int64, stream volume_server_pb.VolumeServer_VolumeFollowServer) error { var blockSizeLimit = int64(len(buf)) for i := int64(0); i < stopOffset-startOffset; i += blockSizeLimit { n, readErr := datFile.ReadAt(buf, startOffset+i) if readErr == nil || readErr == io.EOF { resp := &volume_server_pb.VolumeFollowResponse{} resp.FileContent = buf[:int64(n)] sendErr := stream.Send(resp) if sendErr != nil { return sendErr } } else { return readErr } } return nil }