64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
// Copyright 2014 The Prometheus 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 metric
|
|
|
|
import "github.com/prometheus/common/model"
|
|
|
|
// Metric wraps a model.Metric and copies it upon modification if Copied is false.
|
|
type Metric struct {
|
|
Copied bool
|
|
Metric model.Metric
|
|
}
|
|
|
|
// Set sets a label name in the wrapped Metric to a given value and copies the
|
|
// Metric initially, if it is not already a copy.
|
|
func (m *Metric) Set(ln model.LabelName, lv model.LabelValue) {
|
|
m.Copy()
|
|
m.Metric[ln] = lv
|
|
}
|
|
|
|
// Del deletes a given label name from the wrapped Metric and copies the
|
|
// Metric initially, if it is not already a copy.
|
|
func (m *Metric) Del(ln model.LabelName) {
|
|
m.Copy()
|
|
delete(m.Metric, ln)
|
|
}
|
|
|
|
// Get the value for the given label name. An empty value is returned
|
|
// if the label does not exist in the metric.
|
|
func (m *Metric) Get(ln model.LabelName) model.LabelValue {
|
|
return m.Metric[ln]
|
|
}
|
|
|
|
// Gets behaves as Get but the returned boolean is false iff the label
|
|
// does not exist.
|
|
func (m *Metric) Gets(ln model.LabelName) (model.LabelValue, bool) {
|
|
lv, ok := m.Metric[ln]
|
|
return lv, ok
|
|
}
|
|
|
|
// Copy the underlying Metric if it is not already a copy.
|
|
func (m *Metric) Copy() *Metric {
|
|
if !m.Copied {
|
|
m.Metric = m.Metric.Clone()
|
|
m.Copied = true
|
|
}
|
|
return m
|
|
}
|
|
|
|
// String implements fmt.Stringer.
|
|
func (m Metric) String() string {
|
|
return m.Metric.String()
|
|
}
|