| // 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 ( |
| "math/rand" |
| "time" |
| |
| "github.com/prometheus/client_golang/prometheus" |
| ) |
| |
| var ( |
| requestDuration = prometheus.NewHistogram(prometheus.HistogramOpts{ |
| Name: "example_request_duration_seconds", |
| Help: "Histogram for the runtime of a simple example function.", |
| Buckets: prometheus.LinearBuckets(0.01, 0.01, 10), |
| }) |
| ) |
| |
| func ExampleTimer() { |
| // timer times this example function. It uses a Histogram, but a Summary |
| // would also work, as both implement Observer. Check out |
| // https://prometheus.io/docs/practices/histograms/ for differences. |
| timer := prometheus.NewTimer(requestDuration) |
| defer timer.ObserveDuration() |
| |
| // Do something here that takes time. |
| time.Sleep(time.Duration(rand.NormFloat64()*10000+50000) * time.Microsecond) |
| } |