private ISpan StartSpanInternal(
ISpanContext parent,
bool hasRemoteParent,
string name,
ISampler sampler,
IEnumerable <ISpan> parentLinks,
bool recordEvents,
ITimestampConverter timestampConverter)
{
ITraceParams activeTraceParams = this.Options.TraceConfig.ActiveTraceParams;
IRandomGenerator random = this.Options.RandomHandler;
ITraceId traceId;
ISpanId spanId = SpanId.GenerateRandomId(random);
ISpanId parentSpanId = null;
TraceOptionsBuilder traceOptionsBuilder;
if (parent == null || !parent.IsValid)
{
// New root span.
traceId = TraceId.GenerateRandomId(random);
traceOptionsBuilder = TraceOptions.Builder();
// This is a root span so no remote or local parent.
// hasRemoteParent = null;
hasRemoteParent = false;
}
else
{
// New child span.
traceId = parent.TraceId;
parentSpanId = parent.SpanId;
traceOptionsBuilder = TraceOptions.Builder(parent.TraceOptions);
}
traceOptionsBuilder.SetIsSampled(
MakeSamplingDecision(
parent,
hasRemoteParent,
name,
sampler,
parentLinks,
traceId,
spanId,
activeTraceParams));
TraceOptions traceOptions = traceOptionsBuilder.Build();
SpanOptions spanOptions = SpanOptions.None;
if (traceOptions.IsSampled || recordEvents)
{
spanOptions = SpanOptions.RecordEvents;
}
ISpan span = Span.StartSpan(
SpanContext.Create(traceId, spanId, traceOptions, parent?.Tracestate ?? Tracestate.Empty),
spanOptions,
name,
parentSpanId,
hasRemoteParent,
activeTraceParams,
this.Options.StartEndHandler,
timestampConverter,
this.Options.Clock);
LinkSpans(span, parentLinks);
return(span);
}
private SpanContext(ITraceId traceId, ISpanId spanId, TraceOptions traceOptions)
{
TraceId = traceId;
SpanId = spanId;
TraceOptions = traceOptions;
}
/// <summary>
/// Trace options builder pre-initialized from the given trace options instance.
/// </summary>
/// <param name="traceOptions">Trace options to pre-initialize the builder.</param>
/// <returns>Trace options builder.</returns>
public static TraceOptionsBuilder Builder(TraceOptions traceOptions)
{
return(new TraceOptionsBuilder(traceOptions.options));
}
public static ISpanContext Create(ITraceId traceId, ISpanId spanId, TraceOptions traceOptions)
{
return(new SpanContext(traceId, spanId, traceOptions));
}