public void WorkerThread()
{
this.httpListener.Start();
try
{
while (!this.token.IsCancellationRequested)
{
var ctxTask = this.httpListener.GetContextAsync();
ctxTask.Wait(this.token);
var ctx = ctxTask.Result;
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = PrometheusMetricBuilder.ContentType;
using (var output = ctx.Response.OutputStream)
{
using (var writer = new StreamWriter(output))
{
foreach (var metric in this.Metrics)
{
var labels = metric.Labels;
var value = metric.Value;
var builder = new PrometheusMetricBuilder()
.WithName(metric.MetricName)
.WithDescription(metric.MetricDescription);
builder = builder.WithType("counter");
foreach (var label in labels)
{
var metricValueBuilder = builder.AddValue();
metricValueBuilder = metricValueBuilder.WithValue(value);
metricValueBuilder.WithLabel(label.Key, label.Value);
}
builder.Write(writer);
}
}
}
}
}
catch (OperationCanceledException)
{
// this will happen when cancellation will be requested
}
catch (Exception)
{
// TODO: report error
}
finally
{
this.httpListener.Stop();
this.httpListener.Close();
}
}
public void WorkerThread()
{
this.httpListener.Start();
try
{
while (!this.token.IsCancellationRequested)
{
var ctxTask = this.httpListener.GetContextAsync();
ctxTask.Wait(this.token);
var ctx = ctxTask.Result;
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = PrometheusMetricBuilder.ContentType;
using (var output = ctx.Response.OutputStream)
{
using (var writer = new StreamWriter(output))
{
foreach (var view in this.viewManager.AllExportedViews)
{
var data = this.viewManager.GetView(view.Name);
var builder = new PrometheusMetricBuilder()
.WithName(data.View.Name.AsString)
.WithDescription(data.View.Description);
builder = data.View.Aggregation.Match <PrometheusMetricBuilder>(
(agg) => { return(builder.WithType("gauge")); }, // Func<ISum, M> p0
(agg) => { return(builder.WithType("counter")); }, // Func< ICount, M > p1,
(agg) => { return(builder.WithType("histogram")); }, // Func<IMean, M> p2,
(agg) => { return(builder.WithType("histogram")); }, // Func< IDistribution, M > p3,
(agg) => { return(builder.WithType("gauge")); }, // Func<ILastValue, M> p4,
(agg) => { return(builder.WithType("gauge")); }); // Func< IAggregation, M > p6);
foreach (var value in data.AggregationMap)
{
var metricValueBuilder = builder.AddValue();
// TODO: This is not optimal. Need to refactor to split factory into separate functions
metricValueBuilder = value.Value.Match <PrometheusMetricBuilder.PrometheusMetricValueBuilder>(
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue,
metricValueBuilder.WithValue);
for (var i = 0; i < value.Key.Values.Count; i++)
{
metricValueBuilder.WithLabel(data.View.Columns[i], value.Key.Values[i]);
}
}
builder.Write(writer);
}
}
}
}
}
catch (OperationCanceledException)
{
// this will happen when cancellation will be requested
}
catch (Exception)
{
// TODO: report error
}
finally
{
this.httpListener.Stop();
this.httpListener.Close();
}
}
