1/*
 2 *
 3 * Copyright 2024 gRPC authors.
 4 *
 5 * Licensed under the Apache License, Version 2.0 (the "License");
 6 * you may not use this file except in compliance with the License.
 7 * You may obtain a copy of the License at
 8 *
 9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19// Package stats provides internal stats related functionality.
20package stats
21
22import "context"
23
24// Labels are the labels for metrics.
25type Labels struct {
26	// TelemetryLabels are the telemetry labels to record.
27	TelemetryLabels map[string]string
28}
29
30type labelsKey struct{}
31
32// GetLabels returns the Labels stored in the context, or nil if there is one.
33func GetLabels(ctx context.Context) *Labels {
34	labels, _ := ctx.Value(labelsKey{}).(*Labels)
35	return labels
36}
37
38// SetLabels sets the Labels in the context.
39func SetLabels(ctx context.Context, labels *Labels) context.Context {
40	// could also append
41	return context.WithValue(ctx, labelsKey{}, labels)
42}