public SpanBuilder(
[NotNull] TracerSettings settings,
[NotNull] IDisposable contextScope,
[NotNull] TraceContext currentContext,
[CanBeNull] TraceContext parentContext)
{
this.settings = settings ?? throw new ArgumentNullException(nameof(settings));
this.contextScope = contextScope ?? throw new ArgumentNullException(nameof(contextScope));
metadata = ConstructInitialMetadata(currentContext, parentContext);
annotations = ConstructInitialAnnotations(settings);
watch = Stopwatch.StartNew();
}
private static SpanMetadata ConstructInitialMetadata([NotNull] TraceContext currentContext, [CanBeNull] TraceContext parentContext)
{
var beginTimestamp = PreciseDateTime.Now;
var endTimestamp = DateTimeOffset.MinValue;
var parentSpanId = parentContext?.SpanId;
if (parentSpanId == Guid.Empty)
{
parentSpanId = null;
}
return(new SpanMetadata(
currentContext.TraceId,
currentContext.SpanId,
parentSpanId,
beginTimestamp,
endTimestamp));
}
public static IDisposable Use(TraceContext context)
{
return(TraceContextScope.Begin(context));
}
internal TraceContextScope(TraceContext current, TraceContext parent)
{
Current = current;
Parent = parent;
}