private void BeginRequest(object sender, EventArgs e)
{
var request = HttpContext.Current.Request;
string header = request.Headers.Get(TraceHeaderContext.TraceHeader);
var headerContext = TraceHeaderContext.FromHeader(
header, () => _traceFallbackPredicate?.Invoke(request));
var tracer = _tracerFactory.CreateTracer(headerContext);
if (tracer.GetCurrentTraceId() == null)
{
return;
}
TracerManager.SetCurrentTracer(tracer);
// Start the span and annotate it with information from the current request.
tracer.StartSpan(HttpContext.Current.Request.Path);
tracer.AnnotateSpan(Labels.FromHttpRequest(HttpContext.Current.Request));
tracer.AnnotateSpan(Labels.AgentLabel);
}
