private EventStoreMarker GetMarker()
        {
            EventStoreMarker marker;
            if (!_markerReader.TryGet(_queueName, out marker))
                marker = new EventStoreMarker();

            return marker;
        }
        private void PerformDistribution(CancellationToken token)
        {
            while (!token.IsCancellationRequested)
            {
                var envelopes = _eventStore
                    .LoadSince(_lastKnownDispatchSituation.Stamp);

                bool thereWasSomethingNew = false;

                foreach (var envelope in envelopes)
                {
                    var envelopeStamp = envelope.GetStamp();
                    var envelopeUniqueId = envelope.GetUniqueId();

                    if (_lastKnownDispatchSituation.KnownMessagesWithinStamp.Contains(envelopeUniqueId)) continue;

                    thereWasSomethingNew = true;

                    if (_lastKnownDispatchSituation.Stamp != envelopeStamp)
                        _lastKnownDispatchSituation = new EventStoreMarker(envelopeStamp);

                    _lastKnownDispatchSituation.KnownMessagesWithinStamp.Add(envelopeUniqueId);

                    _queueWriter.Enqueue(_serializer.Serialize(envelope));
                }

                if (thereWasSomethingNew)
                {
                    _markerWriter.AddOrReplace(_queueName, _lastKnownDispatchSituation);
                }
                else
                {
                    Thread.Sleep(500);
                }
            }
        }
        public void Run(CancellationToken token)
        {
            _lastKnownDispatchSituation = GetMarker();

            PerformDistribution(token);
        }