internal ZipkinSpan GenerateSpan(ISpanData spanData, ZipkinEndpoint localEndpoint)
{
SpanContext context = spanData.Context;
long startTimestamp = this.ToEpochMicroseconds(spanData.StartTimestamp);
long endTimestamp = this.ToEpochMicroseconds(spanData.EndTimestamp);
ZipkinSpan.Builder spanBuilder =
ZipkinSpan.NewBuilder()
.TraceId(this.EncodeTraceId(context.TraceId))
.Id(this.EncodeSpanId(context.SpanId))
.Kind(this.ToSpanKind(spanData))
.Name(spanData.Name)
.Timestamp(this.ToEpochMicroseconds(spanData.StartTimestamp))
.Duration(endTimestamp - startTimestamp)
.LocalEndpoint(localEndpoint);
if (spanData.ParentSpanId != null && spanData.ParentSpanId.IsValid)
{
spanBuilder.ParentId(this.EncodeSpanId(spanData.ParentSpanId));
}
foreach (var label in spanData.Attributes.AttributeMap)
{
spanBuilder.PutTag(label.Key, this.AttributeValueToString(label.Value));
}
Status status = spanData.Status;
if (status != null)
{
spanBuilder.PutTag(StatusCode, status.CanonicalCode.ToString());
if (status.Description != null)
{
spanBuilder.PutTag(StatusDescription, status.Description);
}
}
foreach (var annotation in spanData.Events.Events)
{
spanBuilder.AddAnnotation(this.ToEpochMicroseconds(annotation.Timestamp), annotation.Event.Name);
}
return(spanBuilder.Build());
}
internal static ZipkinSpan ToZipkinSpan(this SpanData otelSpan, ZipkinEndpoint defaultLocalEndpoint, bool useShortTraceIds = false)
{
var context = otelSpan.Context;
var startTimestamp = ToEpochMicroseconds(otelSpan.StartTimestamp);
var endTimestamp = ToEpochMicroseconds(otelSpan.EndTimestamp);
var spanBuilder =
ZipkinSpan.NewBuilder()
.TraceId(EncodeTraceId(context.TraceId, useShortTraceIds))
.Id(EncodeSpanId(context.SpanId))
.Kind(ToSpanKind(otelSpan))
.Name(otelSpan.Name)
.Timestamp(ToEpochMicroseconds(otelSpan.StartTimestamp))
.Duration(endTimestamp - startTimestamp);
if (otelSpan.ParentSpanId != default)
{
spanBuilder.ParentId(EncodeSpanId(otelSpan.ParentSpanId));
}
Tuple <string, int> remoteEndpointServiceName = null;
foreach (var label in otelSpan.Attributes)
{
string key = label.Key;
string strVal = label.Value.ToString();
if (strVal != null &&
RemoteEndpointServiceNameKeyResolutionDictionary.TryGetValue(key, out int priority) &&
(remoteEndpointServiceName == null || priority < remoteEndpointServiceName.Item2))
{
remoteEndpointServiceName = new Tuple <string, int>(strVal, priority);
}
spanBuilder.PutTag(key, strVal);
}
// See https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/data-resource-semantic-conventions.md
string serviceName = string.Empty;
string serviceNamespace = string.Empty;
foreach (var label in otelSpan.LibraryResource.Attributes)
{
string key = label.Key;
object val = label.Value;
string strVal = val as string;
if (key == Resource.ServiceNameKey && strVal != null)
{
serviceName = strVal;
}
else if (key == Resource.ServiceNamespaceKey && strVal != null)
{
serviceNamespace = strVal;
}
else
{
spanBuilder.PutTag(key, strVal ?? val?.ToString());
}
}
if (serviceNamespace != string.Empty)
{
serviceName = serviceNamespace + "." + serviceName;
}
var endpoint = defaultLocalEndpoint;
// override default service name
if (serviceName != string.Empty)
{
endpoint = LocalEndpointCache.GetOrAdd(serviceName, _ => new ZipkinEndpoint()
{
Ipv4 = defaultLocalEndpoint.Ipv4,
Ipv6 = defaultLocalEndpoint.Ipv6,
Port = defaultLocalEndpoint.Port,
ServiceName = serviceName,
});
}
spanBuilder.LocalEndpoint(endpoint);
if ((otelSpan.Kind == SpanKind.Client || otelSpan.Kind == SpanKind.Producer) && remoteEndpointServiceName != null)
{
spanBuilder.RemoteEndpoint(RemoteEndpointCache.GetOrAdd(remoteEndpointServiceName.Item1, _ => new ZipkinEndpoint
{
ServiceName = remoteEndpointServiceName.Item1,
}));
}
var status = otelSpan.Status;
if (status.IsValid)
{
spanBuilder.PutTag(StatusCode, status.CanonicalCode.ToString());
if (status.Description != null)
{
spanBuilder.PutTag(StatusDescription, status.Description);
}
}
foreach (var annotation in otelSpan.Events)
{
spanBuilder.AddAnnotation(ToEpochMicroseconds(annotation.Timestamp), annotation.Name);
}
return(spanBuilder.Build());
}