/// <inheritdoc />
public IManagedTracer CreateTracer(TraceHeaderContext headerContext)
{
GaxPreconditions.CheckNotNull(headerContext, nameof(headerContext));
if (!ShouldTrace(headerContext))
{
return(NullManagedTracer.Instance);
}
var traceId = headerContext.TraceId ?? _traceIdFactory.NextId();
return(SimpleManagedTracer.Create(_consumer, _projectId, traceId, headerContext.SpanId));
}
/// <inheritdoc />
internal IManagedTracer CreateTracer(ITraceContext traceContext)
{
GaxPreconditions.CheckNotNull(traceContext, nameof(traceContext));
if (!ShouldTrace(traceContext))
{
return(NullManagedTracer.Instance);
}
var traceId = traceContext.TraceId ?? _traceIdFactory.NextId();
return(SimpleManagedTracer.Create(_consumer, _projectId, traceId, traceContext.SpanId));
}
/// <inheritdoc />
public IManagedTracer CreateTracer(TraceHeaderContext headerContext)
{
GaxPreconditions.CheckNotNull(headerContext, nameof(headerContext));
if (!ShouldTrace(headerContext))
{
return(DoNothingTracer.Instance);
}
TraceProto trace = new TraceProto
{
ProjectId = _projectId,
TraceId = headerContext.TraceId ?? _traceIdFactory.NextId(),
};
return(SimpleManagedTracer.Create(_consumer, trace, headerContext.SpanId));
}
/// <summary>
/// Creates a <see cref="TraceHeaderContext"/> from a header.
/// </summary>
/// <param name="header">The string value of the trace header. Can be null.
/// See: https://cloud.google.com/trace/docs/faq </param>
/// <param name="traceFallbackPredicate">Optional function to override and trace requests. Can be null.</param>
public static TraceHeaderContext FromHeader(string header, Func <bool?> traceFallbackPredicate)
{
var traceHeaderContext = FromHeader(header);
if (traceHeaderContext.ShouldTrace == null && traceFallbackPredicate != null)
{
bool?shouldTrace = traceFallbackPredicate();
if (shouldTrace == true)
{
return(new TraceHeaderContext(
traceHeaderContext.TraceId ?? _traceIdFactory.NextId(),
traceHeaderContext.SpanId ?? 0, shouldTrace));
}
else if (shouldTrace == false)
{
return(new TraceHeaderContext(
traceHeaderContext.TraceId, traceHeaderContext.SpanId, shouldTrace));
}
}
return(traceHeaderContext);
}
