in sample-apps/prometheus-sample-app/metrics/metrics_collector.go [42:49]
func (mc *metricCollector) updateGauge() {
for _, c := range mc.gauges {
for i := 0; i < mc.datapointCount; i++ {
labels := datapointLabels(i, mc.labelKeys, mc.labelValues)
c.With(labels).Set(rand.Float64())
}
}
}