forked from mirror/client_golang
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
// Copyright 2013 Prometheus Team
|
|
// 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 model
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// A Metric is similar to a LabelSet, but the key difference is that a Metric is
|
|
// a singleton and refers to one and only one stream of samples.
|
|
type Metric map[LabelName]LabelValue
|
|
|
|
// Equal compares the fingerprints of both metrics.
|
|
func (m Metric) Equal(o Metric) bool {
|
|
return m.Fingerprint().Equal(o.Fingerprint())
|
|
}
|
|
|
|
// Before compares the fingerprints of both metrics.
|
|
func (m Metric) Before(o Metric) bool {
|
|
return m.Fingerprint().Less(o.Fingerprint())
|
|
}
|
|
|
|
func (m Metric) String() string {
|
|
metricName, hasName := m[MetricNameLabel]
|
|
numLabels := len(m) - 1
|
|
if !hasName {
|
|
numLabels = len(m)
|
|
}
|
|
labelStrings := make([]string, 0, numLabels)
|
|
for label, value := range m {
|
|
if label != MetricNameLabel {
|
|
labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
|
|
}
|
|
}
|
|
|
|
switch numLabels {
|
|
case 0:
|
|
if hasName {
|
|
return string(metricName)
|
|
} else {
|
|
return "{}"
|
|
}
|
|
default:
|
|
sort.Strings(labelStrings)
|
|
return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ", "))
|
|
}
|
|
}
|
|
|
|
func (m Metric) Fingerprint() Fingerprint {
|
|
var fp Fingerprint
|
|
fp.LoadFromMetric(m)
|
|
return fp
|
|
}
|
|
|
|
// MergeFromLabelSet merges a label set into this Metric, prefixing a collision
|
|
// prefix to the label names merged from the label set where required.
|
|
func (m Metric) MergeFromLabelSet(labels LabelSet, collisionPrefix LabelName) {
|
|
for k, v := range labels {
|
|
if collisionPrefix != "" {
|
|
for {
|
|
if _, exists := m[k]; !exists {
|
|
break
|
|
}
|
|
k = collisionPrefix + k
|
|
}
|
|
}
|
|
|
|
m[k] = v
|
|
}
|
|
}
|