public void Run(CancellationToken cancellationToken)
        {
            while (!cancellationToken.IsCancellationRequested)
            {
                try
                {
                    ReloadCacheIfNeeded();
                    UpdateTopology();
                }
                catch (Exception ex)
                {
                    Log.Error("Unexpected error while updating ACME topology.", ex);
                }
                finally
                {
                    cancellationToken.WaitHandle.WaitOne(TimeSpan.FromMinutes(_configuration.TopologyUpdateIntervalInMinutes));
                }
            }
        }