protected virtual ICollector <IObserver> CreateHttpRequestDurationHistogram()
{
var configuration = new HistogramConfiguration
{
SuppressInitialValue = true,
LabelNames = DefaultRequestDurationLabels,
Buckets = new[] { 0.1, 0.2, 0.5, 1, 2 }
};
_options.ConfigureRequestDurationHistogram?.Invoke(configuration);
if (configuration.LabelNames != DefaultRequestDurationLabels)
{
throw new ArgumentException("The requests in progress histogram configuration is missing the required default labels");
}
return(_metrics.CreateHistogram("http_server_request_duration_seconds", "The duration in seconds that HTTP requests take to process", configuration));
}