/// <summary>
/// Sends the given request. If tracing is initialized and enabled the outgoing request is traced
/// and the trace context is propagated.
/// </summary>
protected override Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var tracer = _managedTracerFactory();
if (SimpleTraceContext.FromTracer(tracer) is SimpleTraceContext traceContext)
{
_traceContextPropagator(request, traceContext);
return(tracer.RunInSpanAsync(
async() =>
{
try
{
tracer.AnnotateSpan(TraceLabels.FromHttpRequestMessage(request));
var response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
tracer.AnnotateSpan(TraceLabels.FromHttpResponseMessage(response));
return response;
}
finally
{
tracer.AnnotateSpan(_customLabels);
}
},
request.RequestUri.ToString()));
}
return(base.SendAsync(request, cancellationToken));
}
/// <summary> /// Gets the current <see cref="ITraceContext"/> as defined by the <see cref="GetCurrentTracer"/> /// or null if the current trace context is not known at the time. /// </summary> public static ITraceContext GetCurrentTraceContext() => SimpleTraceContext.FromTracer(GetCurrentTracer());