public async void HandlePrometheusRequestAsync_ReturnsExpected()
{
var opts = new PrometheusEndpointOptions();
var mopts = TestHelper.GetManagementOptions(opts);
var exporter = new PrometheusExporter();
var processor = new SteeltoeProcessor(exporter);
var factory = AutoCollectingMeterFactory.Create(processor);
var meter = factory.GetMeter("Test");
SetupTestView(meter);
factory.CollectAllMetrics();
processor.ExportMetrics();
Task.Delay(1000).Wait();
var ep = new PrometheusScraperEndpoint(opts, exporter);
var middle = new PrometheusScraperEndpointMiddleware(null, ep, mopts);
var context = CreateRequest("GET", "/actuator/prometheus");
await middle.HandleMetricsRequestAsync(context);
context.Response.Body.Seek(0, SeekOrigin.Begin);
var rdr = new StreamReader(context.Response.Body);
var text = await rdr.ReadToEndAsync();
Assert.Equal("# HELP test Testtest\n# TYPE test counter\ntest{a=\"v1\",b=\"v1\",c=\"v1\"} 45\n", text);
}
public async Task MultipleExportersTestAsync()
{
var opts = new PrometheusEndpointOptions();
var mopts = new ActuatorManagementOptions();
mopts.EndpointOptions.Add(opts);
var exporter1 = new PrometheusExporter();
var exporter2 = new SteeltoeExporter();
var multiExporter = new MultiExporter(new MetricExporter[] { exporter1, exporter2 }.ToList());
var processor = new SteeltoeProcessor(multiExporter);
var factory = AutoCollectingMeterFactory.Create(processor);
var meter = factory.GetMeter("Test");
SetupTestView(meter);
factory.CollectAllMetrics();
processor.ExportMetrics();
Task.Delay(1000).Wait();
var ep = new PrometheusScraperEndpoint(opts, exporter1);
var middle = new PrometheusScraperEndpointMiddleware(null, ep, mopts);
var context = CreateRequest("GET", "/actuator/prometheus");
await middle.HandleMetricsRequestAsync(context);
context.Response.Body.Seek(0, SeekOrigin.Begin);
var rdr = new StreamReader(context.Response.Body);
var text = await rdr.ReadToEndAsync();
Assert.Equal("# HELP test Testtest\n# TYPE test counter\ntest{a=\"v1\",b=\"v1\",c=\"v1\"} 45\n", text);
var meopts = new MetricsEndpointOptions();
var ep2 = new MetricsEndpoint(meopts, exporter2);
var middle2 = new MetricsEndpointMiddleware(null, ep2, mopts);
var context2 = CreateRequest("GET", "/actuator/metrics/test", "?tag=a:v1");
await middle2.HandleMetricsRequestAsync(context2);
Assert.Equal(200, context.Response.StatusCode);
context2.Response.Body.Seek(0, SeekOrigin.Begin);
StreamReader rdr2 = new StreamReader(context2.Response.Body);
string json = await rdr2.ReadToEndAsync();
Assert.Equal("{\"name\":\"test\",\"measurements\":[{\"statistic\":\"COUNT\",\"value\":45}],\"availableTags\":[{\"tag\":\"a\",\"values\":[\"v1\"]},{\"tag\":\"b\",\"values\":[\"v1\"]},{\"tag\":\"c\",\"values\":[\"v1\"]}]}", json);
}