public AppMetricSource(MetricSourceOptions options) : base(options)
{
_rng = new Random();
_requests = AddCounter("request.hits", "requests", "Number of requests to the application, split by route", new MetricTag <string>("route"));
_errors = AddCounter("request.errors", "requests", "Number of errors in the application, split by route and status code", new MetricTag <string>("route"), new MetricTag <int>("status_code"));
_randomNumber = AddSamplingGauge("random", "number", "A random number");
_randomNumberByType = AddSamplingGauge("random.by_type", "number", "A random number, split by an enum", new MetricTag <RandomNumberType>("type"));
}
protected override void UpdateMetric(SamplingGauge metric) => metric.Record(42.123d);
