Opentelemetry C#（對於開發者的運行原理）

dotnet add package OpenTelemetry -Version <version>
dotnet add package OpenTelemetry.Extensions.Hosting -Version <version>
dotnet add package OpenTelemetry.Instrumentation.AspNetCore -Version <version>
dotnet add package OpenTelemetry.Exporter.Console -Version <version>

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();
    services.AddOpenTelemetryTracing(builder =>
    {
        builder.AddAspNetCoreInstrumentation()
               .AddHttpClientInstrumentation()
               .AddConsoleExporter();
    });
}

Public Sub ConfigureServices(ByVal services As IServiceCollection)
	services.AddControllers()
	services.AddOpenTelemetryTracing(Sub(builder)
		builder.AddAspNetCoreInstrumentation().AddHttpClientInstrumentation().AddConsoleExporter()
	End Sub)
End Sub

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();
    services.AddOpenTelemetryMetrics(builder =>
    {
        builder.AddAspNetCoreInstrumentation()
               .AddHttpClientInstrumentation()
               .AddConsoleExporter(options => options.Targets = ConsoleExporterOutputTargets.Console);
    });
}

Public Sub ConfigureServices(ByVal services As IServiceCollection)
	services.AddControllers()
	services.AddOpenTelemetryMetrics(Sub(builder)
		builder.AddAspNetCoreInstrumentation().AddHttpClientInstrumentation().AddConsoleExporter(Sub(options) options.Targets = ConsoleExporterOutputTargets.Console)
	End Sub)
End Sub

var meter = new Meter("MyCustomMetrics", "1.0");
var counter = meter.CreateCounter<int>("custom_request_count", description: "Counts custom requests");
app.Use((context, next) =>
{
    counter.Add(1, new KeyValuePair<string, object>("path", context.Request.Path));
    return next();
});

Dim meter As New Meter("MyCustomMetrics", "1.0")
Dim counter = meter.CreateCounter(Of Integer)("custom_request_count", description:= "Counts custom requests")
app.Use(Function(context, [next])
	counter.Add(1, New KeyValuePair(Of String, Object)("path", context.Request.Path))
	Return [next]()
End Function)

dotnet add package IronPDF

using IronPdf;
using OpenTelemetry.Trace;

public class PdfService
{
    private readonly Tracer _tracer;

    public PdfService(Tracer tracer)
    {
        _tracer = tracer;
    }

    public void GeneratePdf()
    {
        // Create a new activity for this operation
        using var activity = _tracer.StartActivity("Generate PDF");

        // Simulate adding some attributes related to the operation
        activity?.SetTag("pdf.size", "A4");
        activity?.SetTag("pdf.content", "Hello World");

        try
        {
            // Initialize the PDF generator
            var renderer = new ChromePdfRenderer();

            // Generate a PDF from HTML
            var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");

            // Save the PDF to a file
            var outputPath = "output.pdf";
            pdf.SaveAs(outputPath);

            // Log success
            activity?.SetTag("pdf.status", "Success");
            activity?.SetTag("pdf.outputPath", outputPath);
        }
        catch (Exception ex)
        {
            // Log any exceptions that occur during PDF generation
            activity?.SetTag("pdf.status", "Error");
            activity?.SetTag("pdf.error", ex.Message);
            throw;
        }
    }
}

Imports IronPdf
Imports OpenTelemetry.Trace

Public Class PdfService
	Private ReadOnly _tracer As Tracer

	Public Sub New(ByVal tracer As Tracer)
		_tracer = tracer
	End Sub

	Public Sub GeneratePdf()
		' Create a new activity for this operation
		Dim activity = _tracer.StartActivity("Generate PDF")

		' Simulate adding some attributes related to the operation
		If activity IsNot Nothing Then
			activity.SetTag("pdf.size", "A4")
		End If
		If activity IsNot Nothing Then
			activity.SetTag("pdf.content", "Hello World")
		End If

		Try
			' Initialize the PDF generator
			Dim renderer = New ChromePdfRenderer()

			' Generate a PDF from HTML
			Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>")

			' Save the PDF to a file
			Dim outputPath = "output.pdf"
			pdf.SaveAs(outputPath)

			' Log success
			If activity IsNot Nothing Then
				activity.SetTag("pdf.status", "Success")
			End If
			If activity IsNot Nothing Then
				activity.SetTag("pdf.outputPath", outputPath)
			End If
		Catch ex As Exception
			' Log any exceptions that occur during PDF generation
			If activity IsNot Nothing Then
				activity.SetTag("pdf.status", "Error")
			End If
			If activity IsNot Nothing Then
				activity.SetTag("pdf.error", ex.Message)
			End If
			Throw
		End Try
	End Sub
End Class