public ISpanContext Extract <TCarrier>(TCarrier carrier)
{
if (carrier is ITextMap map)
{
var baggage = new Dictionary <string, string>();
SpanContext context = null;
foreach (var item in map)
{
// GRPC Metadata is case insensitive, so the case could get lost.
if (item.Key.Equals(_headersConfig.TraceContextHeaderName, StringComparison.OrdinalIgnoreCase))
{
var safeValue = _decodeValue(item.Value);
context = SpanContext.FromString(safeValue);
}
else if (item.Key.StartsWith(_headersConfig.TraceBaggageHeaderPrefix, StringComparison.OrdinalIgnoreCase))
{
var safeKey = RemoveBaggageKeyPrefix(item.Key);
var safeValue = _decodeValue(item.Value);
baggage.Add(safeKey, safeValue);
}
}
return(context?.SetBaggageItems(baggage));
}
throw new ArgumentException($"{nameof(carrier)} is not ITextMap");
}
public void SpanContext_SetBaggageItems()
{
var traceId = new TraceId(1, 2);
var spanId = new SpanId(3);
var parentId = new SpanId(4);
var baggage = new Dictionary <string, string> {
{ "key", "value" }
};
var sc = new SpanContext(traceId, spanId, parentId, baggage);
Assert.Equal(baggage, sc.GetBaggageItems());
var newBaggage = new Dictionary <string, string> {
{ "new", "baggage" }
};
sc.SetBaggageItems(newBaggage);
Assert.Equal(newBaggage, sc.GetBaggageItems());
}