internal void BeginRequest(object sender, EventArgs e)
{
var request = HttpContext.Current.Request;
string header = request.Headers.Get(TraceHeaderContext.TraceHeader);
var headerContext = TraceHeaderContext.FromHeader(
header, () => _traceFallbackPredicate?.ShouldTrace(request));
var tracer = _tracerFactory(headerContext);
if (tracer.GetCurrentTraceId() == null)
{
return;
}
ContextInstanceManager.Set(tracer);
if (headerContext.TraceId != null)
{
// Set the updated trace header on the response.
var updatedHeaderContext = TraceHeaderContext.Create(
tracer.GetCurrentTraceId(), tracer.GetCurrentSpanId() ?? 0, true);
HttpContext.Current.Response.Headers.Set(
TraceHeaderContext.TraceHeader, updatedHeaderContext.ToString());
}
// Start the span and annotate it with information from the current request.
var span = tracer.StartSpan(HttpContext.Current.Request.Path);
ContextInstanceManager.Set(span);
tracer.AnnotateSpan(Labels.FromHttpRequest(HttpContext.Current.Request));
tracer.AnnotateSpan(Labels.AgentLabel);
}
/// <summary>
/// Creates a <see cref="TraceHeaderContext"/> from an <see cref="HttpRequest"/>.
/// </summary>
public static TraceHeaderContext CreateContext(HttpRequest request)
{
GaxPreconditions.CheckNotNull(request, nameof(request));
string header = request.Headers.Get(TraceHeaderContext.TraceHeader);
return(TraceHeaderContext.FromHeader(header));
}
private void BeginRequest(object sender, EventArgs e)
{
TraceHeaderContext headerContext = TraceHeaderContext.FromRequest(HttpContext.Current.Request);
TraceOptions headerOptions = _headerFactory.CreateOptions(headerContext);
// If the trace header says to trace or if the rate limiter allows tracing continue.
if (!headerOptions.ShouldTrace)
{
TraceOptions options = _rateFactory.CreateOptions();
if (!options.ShouldTrace)
{
return;
}
}
// Create and set the tracer for the request.
TraceProto trace = new TraceProto
{
ProjectId = _projectId,
TraceId = headerContext.TraceId ?? _traceIdfactory.NextId(),
};
IManagedTracer tracer = SimpleManagedTracer.Create(_consumer, trace, headerContext.SpanId);
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));
}
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);
}
/// <summary>
/// Create a new <see cref="TraceHeaderTraceOptionsFactory"/> from a <see cref="TraceHeaderContext"/>
/// </summary>
public TraceOptions CreateOptions(TraceHeaderContext context)
{
GaxPreconditions.CheckNotNull(context, nameof(context));
return(TraceOptions.Create(context.ShouldTrace));
}
/// <summary> /// Create a new <see cref="TraceHeaderTraceOptionsFactory"/>. /// </summary> public TraceOptions CreateOptions() => CreateOptions(TraceHeaderContext.FromRequest(HttpContext.Current.Request));