mirror of
https://gitee.com/milvus-io/milvus.git
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83 lines
2.8 KiB
Go
83 lines
2.8 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package datanode
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import (
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"context"
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"fmt"
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"reflect"
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"github.com/milvus-io/milvus/internal/types"
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"github.com/milvus-io/milvus/internal/proto/commonpb"
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"github.com/milvus-io/milvus/internal/proto/etcdpb"
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"github.com/milvus-io/milvus/internal/proto/milvuspb"
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"github.com/milvus-io/milvus/internal/proto/schemapb"
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)
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// metaService initialize replica collections in data node from root coord.
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// Initializing replica collections happens on data node starting. It depends on
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// a healthy root coord and a valid root coord grpc client.
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type metaService struct {
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replica Replica
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collectionID UniqueID
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rootCoord types.RootCoord
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}
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// newMetaService creates a new metaService with provided RootCoord and collectionID.
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func newMetaService(rc types.RootCoord, collectionID UniqueID) *metaService {
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return &metaService{
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rootCoord: rc,
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collectionID: collectionID,
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}
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}
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// getCollectionSchema get collection schema with provided collection id at specified timestamp.
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func (mService *metaService) getCollectionSchema(ctx context.Context, collID UniqueID, timestamp Timestamp) (*schemapb.CollectionSchema, error) {
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req := &milvuspb.DescribeCollectionRequest{
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Base: &commonpb.MsgBase{
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MsgType: commonpb.MsgType_DescribeCollection,
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MsgID: 0, //GOOSE TODO
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Timestamp: 0, // GOOSE TODO
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SourceID: Params.NodeID,
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},
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DbName: "default", // GOOSE TODO
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CollectionID: collID,
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TimeStamp: timestamp,
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}
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response, err := mService.rootCoord.DescribeCollection(ctx, req)
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if err != nil {
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return nil, fmt.Errorf("Grpc error when describe collection %v from rootcoord: %s", collID, err.Error())
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}
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if response.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
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return nil, fmt.Errorf("Describe collection %v from rootcoord wrong: %s", collID, response.GetStatus().GetReason())
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}
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return response.GetSchema(), nil
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}
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// printCollectionStruct util function to print schema data, used in tests only.
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func printCollectionStruct(obj *etcdpb.CollectionMeta) {
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v := reflect.ValueOf(obj)
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v = reflect.Indirect(v)
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typeOfS := v.Type()
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for i := 0; i < v.NumField()-3; i++ {
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if typeOfS.Field(i).Name == "GrpcMarshalString" {
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continue
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}
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fmt.Printf("Field: %s\tValue: %v\n", typeOfS.Field(i).Name, v.Field(i).Interface())
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}
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}
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