public async Task <TResponse> Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate <TResponse> next)
{
var sw = new Stopwatch();
sw.Start();
var response = await next();
if (request is IMetrics metric)
{
_metricsService.ObserveMetric(metric.Metric);
}
sw.Stop();
var messageName = typeof(TRequest).Name;
_metricsService.ObserveMetric(
new HistogramMetric($"{messageName}_seconds", $"Duration (in seconds) for {messageName}", sw.ElapsedMilliseconds / 1000.0)
);
return(response);
}