Function addWithExemplar

prometheus/promhttp/instrument_server.go:43–49

addWithExemplar is a wrapper for [prometheus.ExemplarAdder.AddWithExemplar], which falls back to [prometheus.Counter.Add] if no labels are provided.

(obs prometheus.Counter, val float64, labels map[string]string)

// addWithExemplar is a wrapper for [prometheus.ExemplarAdder.AddWithExemplar],
// which falls back to [prometheus.Counter.Add] if no labels are provided.
func addWithExemplar(obs prometheus.Counter, val float64, labels map[string]string) {
	if labels == nil {
		obs.Add(val)
		return
	}
	obs.(prometheus.ExemplarAdder).AddWithExemplar(val, labels)
}

// InstrumentHandlerInFlight is a middleware that wraps the provided
// http.Handler. It sets the provided prometheus.Gauge to the number of