seaweedfs/weed/server/volume_grpc_read_write.go

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package weed_server
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
"github.com/seaweedfs/seaweedfs/weed/storage/needle"
"github.com/seaweedfs/seaweedfs/weed/storage/types"
)
func (vs *VolumeServer) ReadNeedleBlob(ctx context.Context, req *volume_server_pb.ReadNeedleBlobRequest) (resp *volume_server_pb.ReadNeedleBlobResponse, err error) {
resp = &volume_server_pb.ReadNeedleBlobResponse{}
v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
if v == nil {
return nil, fmt.Errorf("not found volume id %d", req.VolumeId)
}
resp.NeedleBlob, err = v.ReadNeedleBlob(req.Offset, types.Size(req.Size))
if err != nil {
return nil, fmt.Errorf("read needle blob offset %d size %d: %v", req.Offset, req.Size, err)
}
return resp, nil
}
func (vs *VolumeServer) ReadNeedleMeta(ctx context.Context, req *volume_server_pb.ReadNeedleMetaRequest) (resp *volume_server_pb.ReadNeedleMetaResponse, err error) {
resp = &volume_server_pb.ReadNeedleMetaResponse{}
volumeId := needle.VolumeId(req.VolumeId)
n := &needle.Needle{
Id: types.NeedleId(req.NeedleId),
Flags: 0x08,
}
size := req.Size
offset := req.Offset
hasVolume := vs.store.HasVolume(volumeId)
if !hasVolume {
return nil, fmt.Errorf("not found volume id %d and read needle metadata at ec shards is not supported", req.VolumeId)
}
err = vs.store.ReadVolumeNeedleMetaAt(volumeId, n, offset, size)
if err != nil {
return nil, err
}
resp.Cookie = uint32(n.Cookie)
resp.LastModified = n.LastModified
resp.Crc = n.Checksum.Value()
if n.HasTtl() {
resp.Ttl = n.Ttl.String()
}
return resp, nil
}
func (vs *VolumeServer) WriteNeedleBlob(ctx context.Context, req *volume_server_pb.WriteNeedleBlobRequest) (resp *volume_server_pb.WriteNeedleBlobResponse, err error) {
resp = &volume_server_pb.WriteNeedleBlobResponse{}
v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
if v == nil {
return nil, fmt.Errorf("not found volume id %d", req.VolumeId)
}
if err = v.WriteNeedleBlob(types.NeedleId(req.NeedleId), req.NeedleBlob, types.Size(req.Size)); err != nil {
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return nil, fmt.Errorf("write blob needle %d size %d: %v", req.NeedleId, req.Size, err)
}
return resp, nil
}