internal static Guid ExtractActivityId(Message message)
{
if (TraceUtility.MessageFlowTracingOnly)
{
return(ActivityIdHeader.ExtractActivityId(message));
}
ServiceModelActivity activity = ExtractActivity(message);
return(activity == null ? Guid.Empty : activity.Id);
}
internal static void TransferFromTransport(Message message)
{
if (message != null && DiagnosticUtility.ShouldUseActivity)
{
Guid guid = Guid.Empty;
// Only look if we are allowing user propagation
if (TraceUtility.ShouldPropagateActivity)
{
guid = ActivityIdHeader.ExtractActivityId(message);
}
if (guid == Guid.Empty)
{
guid = Guid.NewGuid();
}
ServiceModelActivity activity = null;
bool emitStart = true;
if (ServiceModelActivity.Current != null)
{
if ((ServiceModelActivity.Current.Id == guid) ||
(ServiceModelActivity.Current.ActivityType == ActivityType.ProcessAction))
{
activity = ServiceModelActivity.Current;
emitStart = false;
}
else if (ServiceModelActivity.Current.PreviousActivity != null &&
ServiceModelActivity.Current.PreviousActivity.Id == guid)
{
activity = ServiceModelActivity.Current.PreviousActivity;
emitStart = false;
}
}
if (activity == null)
{
activity = ServiceModelActivity.CreateActivity(guid);
}
if (DiagnosticUtility.ShouldUseActivity)
{
if (emitStart)
{
if (null != FxTrace.Trace)
{
FxTrace.Trace.TraceTransfer(guid);
}
ServiceModelActivity.Start(activity, SR.Format(SR.ActivityProcessAction, message.Headers.Action), ActivityType.ProcessAction);
}
}
message.Properties[TraceUtility.ActivityIdKey] = activity;
}
}