/// <summary>
/// Create a new instance of <see cref="CloudTraceMiddleware"/>.
/// </summary>
/// <param name="next">The next request delegate. Must not be null.</param>
/// <param name="tracerFactory">A factory to create <see cref="IManagedTracer"/>s. Must not be null.</param>
/// <param name="nameProvider">The cloud trace name provider used for naming the root trace span</param>
public CloudTraceMiddleware(
RequestDelegate next, Func <TraceHeaderContext, IManagedTracer> tracerFactory, ICloudTraceNameProvider nameProvider)
{
_nameProvider = nameProvider;
_next = GaxPreconditions.CheckNotNull(next, nameof(next));
_tracerFactory = GaxPreconditions.CheckNotNull(tracerFactory, nameof(tracerFactory));
}
