49 lines
1.6 KiB
Go
49 lines
1.6 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 prometheus_test
|
|
|
|
import (
|
|
"os"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
var (
|
|
// If a function is called rarely (i.e. not more often than scrapes
|
|
// happen) or ideally only once (like in a batch job), it can make sense
|
|
// to use a Gauge for timing the function call. For timing a batch job
|
|
// and pushing the result to a Pushgateway, see also the comprehensive
|
|
// example in the push package.
|
|
funcDuration = prometheus.NewGauge(prometheus.GaugeOpts{
|
|
Name: "example_function_duration_seconds",
|
|
Help: "Duration of the last call of an example function.",
|
|
})
|
|
)
|
|
|
|
func run() error {
|
|
// The Set method of the Gauge is used to observe the duration.
|
|
timer := prometheus.NewTimer(prometheus.ObserverFunc(funcDuration.Set))
|
|
defer timer.ObserveDuration()
|
|
|
|
// Do something. Return errors as encountered. The use of 'defer' above
|
|
// makes sure the function is still timed properly.
|
|
return nil
|
|
}
|
|
|
|
func ExampleTimer_gauge() {
|
|
if err := run(); err != nil {
|
|
os.Exit(1)
|
|
}
|
|
}
|