forked from digitalocean/vulcan
/
metrictokey.go
36 lines (32 loc) · 1.14 KB
/
metrictokey.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
// Copyright 2016 The Vulcan Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package convert
import (
"encoding/json"
"github.com/digitalocean/vulcan/bus"
)
// MetricToKey creates a consistent key for a metric. It piggy-backs off the
// property that golang json package sorts map keys while marshalling
// https://golang.org/src/encoding/json/encode.go#L615
func MetricToKey(m bus.Metric) (string, error) {
// assign metric name the label "__name__" and gather all other metric labels
labels := map[string]string{
"__name__": m.Name,
}
for k, v := range m.Labels {
labels[k] = v
}
b, err := json.Marshal(labels)
return string(b), err
}