MediatR pipeline for OpenTelemetry Logging

OpenTelemetryMediatrBehaviour.cs

public class OpenTelemetryMediatrBehaviour<TRequest, TResponse>(ActivitySource activitySource) :
    IPipelineBehavior<TRequest, TResponse>
    where TRequest : notnull
{
    public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
    {
        using var activity = activitySource.StartActivity(typeof(TRequest).FullName);

        activity.SetTag("mediatr.requesttype", typeof(TRequest));
        activity.SetTag("mediatr.request", JsonConvert.SerializeObject(request));

        activity.SetStartTime(DateTime.UtcNow);
        try
        {
            var response = await next();

            activity.SetEndTime(DateTime.UtcNow);

            activity.SetTag("mediatr.responsetype", typeof(TResponse));
            activity.SetTag("mediatr.response", JsonConvert.SerializeObject(response));

            return response;
        }
        catch (Exception ex)
        {
            activity.SetStatus(ActivityStatusCode.Error, ex.ToString());
            throw;
        }
    }
}