protected GrpcRequestMiddlewareBase(GrpcMetricsOptionsBase?options, TCollector?customMetric)
{
MetricFactory = Metrics.WithCustomRegistry(options?.Registry ?? Metrics.DefaultRegistry);
if (customMetric != null)
{
_metric = customMetric;
ValidateNoUnexpectedLabelNames();
}
else
{
_metric = CreateMetricInstance(DefaultLabels);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MetricFactory"/> class.
/// </summary>
/// <param name="innerMetricFactory">The inner <see cref="Prometheus.MetricFactory"/> for Prometheus.</param>
public MetricFactory(Prometheus.MetricFactory innerMetricFactory)
{
_innerMetricFactory = innerMetricFactory;
}
protected override ICollector <ICounter> CreateMetricInstance(string[] labelNames) => MetricFactory.CreateCounter(
"grpc_requests_received_total",
"Number of gRPC requests received (including those currently being processed).",
new CounterConfiguration
{
LabelNames = labelNames
});