/// <summary>
/// Extracts traceId and spanId from a WavefrontSpanContext and constructs a Jaeger
/// client compatible header of the form traceId:spanId:parentId:samplingDecision.
/// </summary>
private string ContextToTraceIdHeader(WavefrontSpanContext context)
{
string traceId = GuidToHex(context.GetTraceId());
string spanId = GuidToHex(context.GetSpanId());
bool samplingDecision = context.GetSamplingDecision() ?? false;
string decision = samplingDecision ? "1" : "0";
string parentId = Guid.TryParse(context.GetBaggageItem(ParentIdKey), out Guid guid) ?
GuidToHex(guid) : "0";
return($"{traceId}:{spanId}:{parentId}:{decision}");
}
public void TestTraceIdExtractEncoded()
{
string val = "3871de7e09c53ae8%3A7499dd16d98ab60e%3A3771de7e09c55ae8%3A1";
var dictionary = new Dictionary <string, string>();
dictionary.Add(JaegerHeader, val);
var textMapExtractAdapter = new TextMapExtractAdapter(dictionary);
WavefrontSpanContext ctx = wfJaegerPropagator.Extract(textMapExtractAdapter);
Assert.NotNull(ctx);
Assert.Equal("00000000-0000-0000-3871-de7e09c53ae8", ctx.TraceId);
Assert.Equal("00000000-0000-0000-7499-dd16d98ab60e", ctx.SpanId);
Assert.Equal("00000000-0000-0000-7499-dd16d98ab60e", ctx.GetBaggageItem(ParentIdKey));
Assert.True(ctx.GetSamplingDecision() ?? false);
}
/// <inheritdoc />
public void Inject <TCarrier>(WavefrontSpanContext spanContext, TCarrier carrier)
{
if (carrier is ITextMap textMap)
{
textMap.Set(traceIdHeader, ContextToTraceIdHeader(spanContext));
foreach (var entry in spanContext.GetBaggageItems())
{
textMap.Set(baggagePrefix + entry.Key, entry.Value);
}
if (spanContext.IsSampled())
{
textMap.Set(SamplingDecisionKey, spanContext.GetSamplingDecision().ToString());
}
}
else
{
throw new ArgumentException("Invalid carrier " + carrier.GetType());
}
}