private static void SetLinks(Span.Types.Links spanLinks, IDictionary <string, string> telemetryProperties)
{
if (spanLinks?.Link == null)
{
return;
}
// for now, we just put links to telemetry properties
// link0_spanId = ...
// link0_traceId = ...
// link0_type = child | parent | other
// link0_<attributeKey> = <attributeValue>
// this is not convenient for querying data
// We'll consider adding Links to operation telemetry schema
int num = 0;
foreach (var link in spanLinks.Link)
{
string prefix = $"{LinkPropertyName}{num++}_";
telemetryProperties[prefix + LinkSpanIdPropertyName] = BytesStringToHexString(link.SpanId);
telemetryProperties[prefix + LinkTraceIdPropertyName] = BytesStringToHexString(link.TraceId);
telemetryProperties[prefix + LinkTypePropertyName] = link.Type.ToString();
if (link.Attributes?.AttributeMap != null)
{
foreach (var attribute in link.Attributes.AttributeMap)
{
SetCustomProperty(telemetryProperties, attribute, prefix);
}
}
}
}
internal static Span ToProtoSpan(this SpanData spanData)
{
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];
spanData.Context.TraceId.CopyTo(traceIdBytes);
spanData.Context.SpanId.CopyTo(spanIdBytes);
var parentSpanIdString = ByteString.Empty;
if (spanData.ParentSpanId != default)
{
Span <byte> parentSpanIdBytes = stackalloc byte[8];
spanData.ParentSpanId.CopyTo(parentSpanIdBytes);
parentSpanIdString = ByteString.CopyFrom(parentSpanIdBytes.ToArray());
}
return(new Span
{
Name = new TruncatableString {
Value = spanData.Name
},
// TODO: Utilize new Span.Types.SpanKind below when updated protos are incorporated, also confirm default for SpanKind.Internal
Kind = spanData.Kind == SpanKind.Client || spanData.Kind == SpanKind.Producer ? Span.Types.SpanKind.Client : Span.Types.SpanKind.Server,
TraceId = ByteString.CopyFrom(traceIdBytes.ToArray()),
SpanId = ByteString.CopyFrom(spanIdBytes.ToArray()),
ParentSpanId = parentSpanIdString,
StartTime = spanData.StartTimestamp.ToTimestamp(),
EndTime = spanData.EndTimestamp.ToTimestamp(),
Status = spanData.Status == null
? null
: new OpenTelemetry.Proto.Trace.V1.Status
{
Code = (int)spanData.Status.CanonicalCode,
Message = spanData.Status.Description ?? string.Empty,
},
SameProcessAsParentSpan = spanData.ParentSpanId != default,
ChildSpanCount = spanData.ChildSpanCount.HasValue ? (uint)spanData.ChildSpanCount.Value : 0,
Attributes = FromAttributes(spanData.Attributes),
TimeEvents = FromITimeEvents(spanData.Events),
Links = new Span.Types.Links
{
DroppedLinksCount = spanData.Links.DroppedLinksCount,
Link = { spanData.Links.Links.Select(FromILink), },
},
});
}