mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-08-25 03:01:15 +02:00
67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package weed_server
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import (
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"context"
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"fmt"
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"io"
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"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
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"github.com/seaweedfs/seaweedfs/weed/storage/backend"
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"github.com/seaweedfs/seaweedfs/weed/storage/needle"
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)
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func (vs *VolumeServer) VolumeIncrementalCopy(req *volume_server_pb.VolumeIncrementalCopyRequest, stream volume_server_pb.VolumeServer_VolumeIncrementalCopyServer) error {
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v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
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if v == nil {
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return fmt.Errorf("not found volume id %d", req.VolumeId)
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}
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stopOffset, _, _ := v.FileStat()
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foundOffset, isLastOne, err := v.BinarySearchByAppendAtNs(req.SinceNs)
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if err != nil {
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return fmt.Errorf("fail to locate by appendAtNs %d: %s", req.SinceNs, err)
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}
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if isLastOne {
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return nil
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}
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startOffset := foundOffset.ToActualOffset()
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buf := make([]byte, 1024*1024*2)
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return sendFileContent(v.DataBackend, buf, startOffset, int64(stopOffset), stream)
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}
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func (vs *VolumeServer) VolumeSyncStatus(ctx context.Context, req *volume_server_pb.VolumeSyncStatusRequest) (*volume_server_pb.VolumeSyncStatusResponse, error) {
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v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
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if v == nil {
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return nil, fmt.Errorf("not found volume id %d", req.VolumeId)
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}
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resp := v.GetVolumeSyncStatus()
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return resp, nil
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}
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func sendFileContent(datBackend backend.BackendStorageFile, buf []byte, startOffset, stopOffset int64, stream volume_server_pb.VolumeServer_VolumeIncrementalCopyServer) error {
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var blockSizeLimit = int64(len(buf))
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for i := int64(0); i < stopOffset-startOffset; i += blockSizeLimit {
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n, readErr := datBackend.ReadAt(buf, startOffset+i)
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if readErr == nil || readErr == io.EOF {
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resp := &volume_server_pb.VolumeIncrementalCopyResponse{}
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resp.FileContent = buf[:int64(n)]
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sendErr := stream.Send(resp)
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if sendErr != nil {
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return sendErr
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}
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} else {
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return readErr
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}
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}
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return nil
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}
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