mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-30 07:59:40 -08:00
62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 metrics provides abstractions for registering which metrics
|
|
// to record.
|
|
package metrics
|
|
|
|
import (
|
|
"net/url"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
var registerMetrics sync.Once
|
|
|
|
// LatencyMetric observes client latency partitioned by verb and url.
|
|
type LatencyMetric interface {
|
|
Observe(verb string, u url.URL, latency time.Duration)
|
|
}
|
|
|
|
// ResultMetric counts response codes partitioned by method and host.
|
|
type ResultMetric interface {
|
|
Increment(code string, method string, host string)
|
|
}
|
|
|
|
var (
|
|
// RequestLatency is the latency metric that rest clients will update.
|
|
RequestLatency LatencyMetric = noopLatency{}
|
|
// RequestResult is the result metric that rest clients will update.
|
|
RequestResult ResultMetric = noopResult{}
|
|
)
|
|
|
|
// Register registers metrics for the rest client to use. This can
|
|
// only be called once.
|
|
func Register(lm LatencyMetric, rm ResultMetric) {
|
|
registerMetrics.Do(func() {
|
|
RequestLatency = lm
|
|
RequestResult = rm
|
|
})
|
|
}
|
|
|
|
type noopLatency struct{}
|
|
|
|
func (noopLatency) Observe(string, url.URL, time.Duration) {}
|
|
|
|
type noopResult struct{}
|
|
|
|
func (noopResult) Increment(string, string, string) {}
|