internal static Proto.Trace.V1.Span ToProtoSpan(this Trace.Span otelSpan)
{
try
{
// protobuf doesn't understand Span<T> yet: https://github.com/protocolbuffers/protobuf/issues/3431
Span <byte> traceIdBytes = stackalloc byte[16];
Span <byte> spanIdBytes = stackalloc byte[8];
otelSpan.Context.TraceId.CopyTo(traceIdBytes);
otelSpan.Context.SpanId.CopyTo(spanIdBytes);
var parentSpanIdString = ByteString.Empty;
if (otelSpan.ParentSpanId != default)
{
Span <byte> parentSpanIdBytes = stackalloc byte[8];
otelSpan.ParentSpanId.CopyTo(parentSpanIdBytes);
parentSpanIdString = ByteString.CopyFrom(parentSpanIdBytes.ToArray());
}
return(new Proto.Trace.V1.Span
{
Name = new TruncatableString {
Value = otelSpan.Name
},
// TODO: Utilize new Span.Types.SpanKind below when updated protos are incorporated, also confirm default for SpanKind.Internal
Kind = otelSpan.Kind == SpanKind.Client || otelSpan.Kind == SpanKind.Producer ?
Proto.Trace.V1.Span.Types.SpanKind.Client :
Proto.Trace.V1.Span.Types.SpanKind.Server,
TraceId = ByteString.CopyFrom(traceIdBytes.ToArray()),
SpanId = ByteString.CopyFrom(spanIdBytes.ToArray()),
ParentSpanId = parentSpanIdString,
StartTime = otelSpan.StartTimestamp.ToTimestamp(),
EndTime = otelSpan.EndTimestamp.ToTimestamp(),
Status = !otelSpan.Status.IsValid
? null
: new OpenTelemetry.Proto.Trace.V1.Status
{
Code = (int)otelSpan.Status.CanonicalCode,
Message = otelSpan.Status.Description ?? string.Empty,
},
SameProcessAsParentSpan = otelSpan.ParentSpanId != default,
ChildSpanCount = null,
Attributes = FromAttributes(otelSpan.Attributes),
TimeEvents = FromITimeEvents(otelSpan.Events),
Links = new Proto.Trace.V1.Span.Types.Links
{
Link = { otelSpan.Links.Select(FromILink), },
},
});
}
private void AddTrace(HttpListenerContext _Context, bool _bNewSpan, Action <string> _ErrorMessageAction = null)
{
//Start
if (_bNewSpan)
{
_Context.Request.Headers.Set("span-start-time", DateTime.Now.ToString());
}
//End
else
{
var TraceID = _Context.Request.Headers.Get("trace-id");
if (TraceID == null || TraceID.Length == 0)
{
//It is a new trace
TraceID = Guid.NewGuid().ToString("N");
}
string ParentSpanID = null;
string SpanID = _Context.Request.Headers.Get("span-id");
if (SpanID != null && SpanID.Length > 0)
{
ParentSpanID = SpanID;
}
SpanID = GetRandomHexNumber(16);
_Context.Request.Headers.Set("trace-id", TraceID);
_Context.Request.Headers.Set("span-id", SpanID);
var LegitSpanName = new SpanName(ProjectName.ProjectId, TraceID, SpanID);
var TruncString = new TruncatableString
{
Value = _Context.Request.HttpMethod + "->" + _Context.Request.Url.AbsolutePath,
TruncatedByteCount = 0
};
Timestamp StartTime = null;
try
{
StartTime = Timestamp.FromDateTimeOffset(DateTime.Parse(_Context.Request.Headers.Get("span-start-time")));
}
catch (Exception ex)
{
_ErrorMessageAction?.Invoke("BTracingServiceGC->AddTrace: " + ex.Message + ", Trace: " + ex.StackTrace);
}
var Span = new Span
{
SpanName = LegitSpanName,
DisplayName = TruncString,
SpanId = SpanID,
StartTime = StartTime ?? Timestamp.FromDateTimeOffset(DateTime.Now),
EndTime = Timestamp.FromDateTimeOffset(DateTime.Now),
Attributes = new Span.Types.Attributes()
};
if (ParentSpanID != null)
{
Span.ParentSpanId = ParentSpanID;
}
AddEntryToSpan(Span, "Service Name", ProgramUniqueID);
AddEntryToSpan(Span, "HTTP Method", _Context.Request.HttpMethod);
AddEntryToSpan(Span, "HTTP URL", _Context.Request.Url.AbsoluteUri);
AddEntryToSpan(Span, "HTTP Path", _Context.Request.Url.AbsolutePath);
lock (Spans)
{
Spans.Add(Span);
}
}
}