seaweedfs/weed/server/volume_grpc_read_all.go

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package weed_server
import (
"fmt"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
)
func (vs *VolumeServer) ReadAllNeedles(req *volume_server_pb.ReadAllNeedlesRequest, stream volume_server_pb.VolumeServer_ReadAllNeedlesServer) (err error) {
v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
if v == nil {
return fmt.Errorf("not found volume id %d", req.VolumeId)
}
scanner := &VolumeFileScanner4ReadAll{
stream: stream,
}
err = storage.ScanVolumeFileFrom(v.Version(), v.DataBackend, super_block.SuperBlockSize, scanner)
return err
}
type VolumeFileScanner4ReadAll struct {
stream volume_server_pb.VolumeServer_ReadAllNeedlesServer
}
func (scanner *VolumeFileScanner4ReadAll) VisitSuperBlock(superBlock super_block.SuperBlock) error {
return nil
}
func (scanner *VolumeFileScanner4ReadAll) ReadNeedleBody() bool {
return true
}
func (scanner *VolumeFileScanner4ReadAll) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
sendErr := scanner.stream.Send(&volume_server_pb.ReadAllNeedlesResponse{
NeedleId: uint64(n.Id),
NeedleBlob: n.Data,
})
if sendErr != nil {
return sendErr
}
return nil
}