internal PrometheusExporterMiddleware(PrometheusExporter exporter)
{
this.exporter = exporter;
}
/// <summary>
/// Initializes a new instance of the <see cref="PrometheusExporterMiddleware"/> class.
/// </summary>
/// <param name="next">The next middleware in the pipeline.</param>
/// <param name="exporter">The <see cref="PrometheusExporter"/> instance.</param>
public PrometheusExporterMiddleware(RequestDelegate next, PrometheusExporter exporter)
{
this.next = next ?? throw new ArgumentNullException(nameof(next));
this.exporter = exporter ?? throw new ArgumentNullException(nameof(exporter));
}
/// <summary>
/// Initializes a new instance of the <see cref="PrometheusExporterMetricsHttpServer"/> class.
/// </summary>
/// <param name="exporter">The <see cref="PrometheusExporter"/> instance.</param>
public PrometheusExporterMetricsHttpServer(PrometheusExporter exporter)
{
this.exporter = exporter ?? throw new ArgumentNullException(nameof(exporter));
this.httpListener.Prefixes.Add(exporter.Options.Url);
}
/// <summary>
/// Initializes a new instance of the <see cref="PrometheusExporterMetricsHttpServer"/> class.
/// </summary>
/// <param name="exporter">The <see cref="PrometheusExporter"/> instance.</param>
public PrometheusExporterMetricsHttpServer(PrometheusExporter exporter)
{
this.exporter = exporter;
this.httpListener.Prefixes.Add(exporter.Options.Url);
}
public PrometheusCollectionManager(PrometheusExporter exporter)
{
this.exporter = exporter;
this.scrapeResponseCacheDurationInMilliseconds = this.exporter.Options.ScrapeResponseCacheDurationMilliseconds;
this.onCollectRef = this.OnCollect;
}
/// <summary>
/// Serialize to Prometheus Format.
/// </summary>
/// <param name="exporter">Prometheus Exporter.</param>
/// <param name="writer">StreamWriter to write to.</param>
public static void WriteMetricsCollection(this PrometheusExporter exporter, StreamWriter writer)
{
foreach (var metric in exporter.GetAndClearDoubleMetrics())
{
var labels = metric.Labels;
var builder = new PrometheusMetricBuilder()
.WithName(metric.MetricName)
.WithDescription(metric.MetricDescription);
switch (metric.AggregationType)
{
case AggregationType.DoubleSum:
{
var doubleSum = metric.Data as SumData <double>;
var doubleValue = doubleSum.Sum;
builder = builder.WithType("counter");
foreach (var label in labels)
{
var metricValueBuilder = builder.AddValue();
metricValueBuilder = metricValueBuilder.WithValue(doubleValue);
metricValueBuilder.WithLabel(label.Key, label.Value);
}
builder.Write(writer);
break;
}
case AggregationType.Summary:
{
// Not supported yet.
break;
}
}
}
foreach (var metric in exporter.GetAndClearLongMetrics())
{
var labels = metric.Labels;
var builder = new PrometheusMetricBuilder()
.WithName(metric.MetricName)
.WithDescription(metric.MetricDescription);
switch (metric.AggregationType)
{
case AggregationType.LongSum:
{
var longSum = metric.Data as SumData <long>;
var longValue = longSum.Sum;
builder = builder.WithType("counter");
foreach (var label in labels)
{
var metricValueBuilder = builder.AddValue();
metricValueBuilder = metricValueBuilder.WithValue(longValue);
metricValueBuilder.WithLabel(label.Key, label.Value);
}
builder.Write(writer);
break;
}
case AggregationType.Summary:
{
// Not supported yet.
break;
}
}
}
}