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server.go
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server.go
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package main
import (
"context"
"github.com/feast-dev/feast/go/cmd/server/logging"
"github.com/feast-dev/feast/go/internal/feast"
"github.com/feast-dev/feast/go/protos/feast/serving"
prototypes "github.com/feast-dev/feast/go/protos/feast/types"
"github.com/feast-dev/feast/go/types"
"github.com/google/uuid"
)
type servingServiceServer struct {
fs *feast.FeatureStore
loggingService *logging.LoggingService
serving.UnimplementedServingServiceServer
}
func newServingServiceServer(fs *feast.FeatureStore, loggingService *logging.LoggingService) *servingServiceServer {
return &servingServiceServer{fs: fs, loggingService: loggingService}
}
func (s *servingServiceServer) GetFeastServingInfo(ctx context.Context, request *serving.GetFeastServingInfoRequest) (*serving.GetFeastServingInfoResponse, error) {
return &serving.GetFeastServingInfoResponse{
Version: feastServerVersion,
}, nil
}
// Returns an object containing the response to GetOnlineFeatures.
// Metadata contains featurenames that corresponds to the number of rows in response.Results.
// Results contains values including the value of the feature, the event timestamp, and feature status in a columnar format.
func (s *servingServiceServer) GetOnlineFeatures(ctx context.Context, request *serving.GetOnlineFeaturesRequest) (*serving.GetOnlineFeaturesResponse, error) {
requestId := GenerateRequestId()
featuresOrService, err := s.fs.ParseFeatures(request.GetKind())
if err != nil {
return nil, err
}
featureVectors, err := s.fs.GetOnlineFeatures(
ctx,
featuresOrService.FeaturesRefs,
featuresOrService.FeatureService,
request.GetEntities(),
request.GetRequestContext(),
request.GetFullFeatureNames())
if err != nil {
return nil, err
}
resp := &serving.GetOnlineFeaturesResponse{
Results: make([]*serving.GetOnlineFeaturesResponse_FeatureVector, 0),
Metadata: &serving.GetOnlineFeaturesResponseMetadata{
FeatureNames: &serving.FeatureList{Val: make([]string, 0)},
},
}
// Entities are currently part of the features as a value and the order that we add it to the resp MetaData
// Need to figure out a way to map the correct entities to the correct ordering
entityValuesMap := make(map[string][]*prototypes.Value, 0)
featureNames := make([]string, len(featureVectors))
for idx, vector := range featureVectors {
resp.Metadata.FeatureNames.Val = append(resp.Metadata.FeatureNames.Val, vector.Name)
featureNames[idx] = vector.Name
values, err := types.ArrowValuesToProtoValues(vector.Values)
if err != nil {
return nil, err
}
if _, ok := request.Entities[vector.Name]; ok {
entityValuesMap[vector.Name] = values
}
resp.Results = append(resp.Results, &serving.GetOnlineFeaturesResponse_FeatureVector{
Values: values,
Statuses: vector.Statuses,
EventTimestamps: vector.Timestamps,
})
}
if featuresOrService.FeatureService != nil {
go s.loggingService.GenerateLogs(featuresOrService.FeatureService, entityValuesMap, resp.Results[len(request.Entities):], request.RequestContext, requestId)
}
return resp, nil
}
func GenerateRequestId() string {
id := uuid.New()
return id.String()
}