metrics

package main

import (
	"fmt"
	"time"

	_ "github.com/getoutreach/gobox/pkg/log"
	"github.com/getoutreach/gobox/pkg/metrics"
	"github.com/prometheus/client_golang/prometheus"
)

func main() {
	start := time.Now()
	// sleep for 6ms to cross the lower most bucket of 5ms
	time.Sleep(6 * time.Millisecond)
	latency := float64(time.Since(start)) / float64(time.Second)
	metrics.ReportLatency("example_app", "example_call", latency, nil)

	got, err := prometheus.DefaultGatherer.Gather()
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	for _, metricFamily := range got {
		if metricFamily.GetName() == "call_request_seconds" {
			for _, metric := range metricFamily.Metric {
				found := false
				for _, labelPair := range metric.GetLabel() {
					if labelPair.GetName() == "status" && labelPair.GetValue() == "ok" {
						found = true
					}
				}
				if !found {
					continue
				}
				fmt.Println("name", metricFamily.GetName())
				fmt.Println("help", metricFamily.GetHelp())
				fmt.Println("type", metricFamily.GetType())
				fmt.Println("label", metric.GetLabel())
				fmt.Println("summary", metric.GetSummary())
				fmt.Println("sample count", metric.GetHistogram().GetSampleCount())
				fmt.Println("sample count", metric.GetHistogram().GetBucket())
			}
		}
	}

}

Output:

name call_request_seconds
help The latency of the call
type HISTOGRAM
label [name:"app" value:"example_app"  name:"call" value:"example_call"  name:"kind" value:"internal"  name:"status" value:"ok"  name:"statuscategory" value:"CategoryOK"  name:"statuscode" value:"OK" ]
summary <nil>
sample count 1
sample count [cumulative_count:0 upper_bound:0.005  cumulative_count:1 upper_bound:0.01  cumulative_count:1 upper_bound:0.025  cumulative_count:1 upper_bound:0.05  cumulative_count:1 upper_bound:0.1  cumulative_count:1 upper_bound:0.25  cumulative_count:1 upper_bound:0.5  cumulative_count:1 upper_bound:1  cumulative_count:1 upper_bound:2.5  cumulative_count:1 upper_bound:5  cumulative_count:1 upper_bound:10 ]