scaffold for volume server query feature

weed/server/volume_grpc_copy.go

@@ -257,7 +257,3 @@ func (vs *VolumeServer) CopyFile(req *volume_server_pb.CopyFileRequest, stream v
 
 	return nil
 }
-
-func (vs *VolumeServer) findVolumeOrEcVolumeLocation(volumeId needle.VolumeId) {
-
-}

weed/server/volume_grpc_query.go

@@ -0,0 +1,62 @@
+package weed_server
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/tidwall/gjson"
+)
+
+func (vs *VolumeServer) Query(req *volume_server_pb.QueryRequest, stream volume_server_pb.VolumeServer_QueryServer) error {
+
+	for _, fid := range req.FromFileIds {
+
+		vid, id_cookie, err := operation.ParseFileId(fid)
+		if err != nil {
+			glog.V(0).Infof("volume query failed to parse fid %s: %v", fid, err)
+			return err
+		}
+
+		n := new(needle.Needle)
+		volumeId, _ := needle.NewVolumeId(vid)
+		n.ParsePath(id_cookie)
+
+		cookie := n.Cookie
+		if _, err := vs.store.ReadVolumeNeedle(volumeId, n); err != nil {
+			glog.V(0).Infof("volume query failed to read fid %s: %v", fid, err)
+			return err
+		}
+
+		if n.Cookie != cookie {
+			glog.V(0).Infof("volume query failed to read fid cookie %s: %v", fid, err)
+			return err
+		}
+
+		if req.InputSerialization.CsvInput!=nil{
+
+
+
+		}
+
+		if req.InputSerialization.JsonInput!=nil{
+
+			err = stream.Send(&volume_server_pb.QueriedStripe{
+				Records:nil,
+			})
+			if err != nil {
+				// println("sending", bytesread, "bytes err", err.Error())
+				return err
+			}
+			gjson.ForEachLine(string(n.Data), func(line gjson.Result) bool{
+				println(line.String())
+				return true
+			})
+		}
+
+
+
+	}
+
+	return nil
+}