/// <summary>
/// Restores Activity before each pipeline step if it was lost.
/// </summary>
/// <param name="context">HttpContext instance.</param>
/// <param name="step">Step to be executed.</param>
internal void OnExecuteRequestStep(HttpContextBase context, Action step)
{
// Once we have public Activity.Current setter (https://github.com/dotnet/corefx/issues/29207) this method will be
// simplified to just assign Current if is was lost.
// In the mean time, we are creating child Activity to restore the context. We have to send
// event with this Activity to tracing system. It created a lot of issues for listeners as
// we may potentially have a lot of them for different stages.
// To reduce amount of events, we only care about ExecuteRequestHandler stage - restore activity here and
// stop/report it to tracing system in EndRequest.
if (context.CurrentNotification == RequestNotification.ExecuteRequestHandler && !context.IsPostNotification)
{
ActivityHelper.RestoreActivityIfNeeded(context.Items);
}
step();
}
private void Application_PreRequestHandlerExecute(object sender, EventArgs e)
{
AspNetTelemetryCorrelationEventSource.Log.TraceCallback("Application_PreRequestHandlerExecute");
ActivityHelper.RestoreActivityIfNeeded(((HttpApplication)sender).Context.Items);
}