func sendHistogramStats(metric string, value float64, additionalTag string, dog *statsd.Client) {
tags := dog.Tags
dog.Tags = append(dog.Tags, additionalTag)
if os.Getenv("GOSHE_ADDITIONAL_TAGS") != "" {
dog.Tags = append(dog.Tags, os.Getenv("GOSHE_ADDITIONAL_TAGS"))
}
dog.Histogram(metric, value, tags, 1)
dog.Tags = tags
}
func sendPingStats(dog *statsd.Client, rtt time.Duration) {
var err error
seconds := (float64(rtt) / 1000000000)
address := strings.ToLower(strings.Replace(Endpoint, ".", "_", -1))
metricName := fmt.Sprintf("ping.%s", address)
err = dog.Histogram(metricName, seconds, dog.Tags, 1)
if err != nil {
Log(fmt.Sprintf("Error sending ping stats for '%s'", Endpoint), "info")
}
}
// InstrumentMiddleware collects metrics about the current request.
func InstrumentMiddleware(stats *statsd.Client) echo.MiddlewareFunc {
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
defer func(start time.Time) {
tags := []string{
"method:" + c.Request().Method(),
"status:" + strconv.Itoa(c.Response().Status()),
}
stats.Count("laika.request_total", 1, tags, 1)
stats.Histogram("laika.request_duration_microseconds", float64(int(time.Since(start).Seconds()*1000000)), tags, 1)
}(time.Now())
return next(c)
}
}
}