// To run this example, run the following command from
// the reporoot\examples\Console\.
// (eg: C:\repos\opentelemetry-dotnet\examples\Console\)
//
// dotnet run console
internal static object Run(ConsoleOptions options)
{
// Enable TracerProvider for the source "MyCompany.MyProduct.MyWebServer"
// and use a custom MyProcessor, along with Console exporter.
using var tracerProvider = Sdk.CreateTracerProviderBuilder()
.AddSource("MyCompany.MyProduct.MyWebServer")
.SetResource(Resources.CreateServiceResource("MyServiceName"))
.AddProcessor(new MyProcessor()) // This must be added before ConsoleExporter
.AddConsoleExporter()
.Build();
// The above line is required only in applications
// which decide to use OpenTelemetry.
// Libraries would simply write the following lines of code to
// emit activities, which are the .NET representation of OpenTelemetry Spans.
var source = new ActivitySource("MyCompany.MyProduct.MyWebServer");
// The below commented out line shows more likely code in a real world webserver.
// using (var parent = source.StartActivity("HttpIn", ActivityKind.Server, HttpContext.Request.Headers["traceparent"] ))
using (var parent = source.StartActivity("HttpIn", ActivityKind.Server))
{
// TagNames can follow the OpenTelemetry guidelines
// from https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/trace/semantic_conventions
parent?.SetTag("http.method", "GET");
parent?.SetTag("http.host", "MyHostName");
if (parent != null)
{
parent.DisplayName = "HttpIn DisplayName";
// IsAllDataRequested is the equivalent of Span.IsRecording
if (parent.IsAllDataRequested)
{
parent.SetTag("expensive data", "This data is expensive to obtain. Avoid it if activity is not being recorded");
}
}
try
{
// Actual code to achieve the purpose of the library.
// For websebserver example, this would be calling
// user middlware pipeline.
// There can be child activities.
// In this example HttpOut is a child of HttpIn.
using (var child = source.StartActivity("HttpOut", ActivityKind.Client))
{
child?.SetTag("http.url", "www.mydependencyapi.com");
try
{
// do actual work.
child?.AddEvent(new ActivityEvent("sample activity event."));
child?.SetTag("http.status_code", "200");
}
catch (Exception)
{
child?.SetTag("http.status_code", "500");
}
}
parent?.SetTag("http.status_code", "200");
}
catch (Exception)
{
parent?.SetTag("http.status_code", "500");
}
}
System.Console.WriteLine("Press Enter key to exit.");
return(null);
}
// To run this example, run the following command from
// the reporoot\examples\Console\.
// (eg: C:\repos\opentelemetry-dotnet\examples\Console\)
//
// dotnet run console
internal static object Run(ConsoleOptions options)
{
return(RunWithActivitySource());
}