private void Connection_Notification(object sender, NpgsqlNotificationEventArgs e)
        {
            try
            {
                if (e.Condition == "events" || e.Condition == "aggregate_roots")
                {
                    TraceSource.TraceEvent(TraceEventType.Verbose, 5137, "Postgres notification: {0} with {1}", e.Condition, e.AdditionalInformation);
                    var firstSeparator  = e.AdditionalInformation.IndexOf(':');
                    var name            = e.AdditionalInformation.Substring(0, firstSeparator);
                    var secondSeparator = e.AdditionalInformation.Substring(firstSeparator + 1).IndexOf(':');
                    var op    = e.AdditionalInformation.Substring(firstSeparator + 1, secondSeparator).Trim();
                    var array = e.AdditionalInformation.Substring(firstSeparator + secondSeparator + 2).Trim();
                    if (array.Length > 0)
                    {
                        var uris = StringConverter.ParseCollection(Reader.Reuse(array), 0, false).ToArray();
                        switch (op)
                        {
                        case "Update":
                            Subject.OnNext(new NotifyInfo(name, NotifyInfo.OperationEnum.Update, NotifyInfo.SourceEnum.Database, uris));
                            break;

                        case "Change":
                            Subject.OnNext(new NotifyInfo(name, NotifyInfo.OperationEnum.Change, NotifyInfo.SourceEnum.Database, uris));
                            break;

                        case "Delete":
                            Subject.OnNext(new NotifyInfo(name, NotifyInfo.OperationEnum.Delete, NotifyInfo.SourceEnum.Database, uris));
                            break;

                        default:
                            Subject.OnNext(new NotifyInfo(name, NotifyInfo.OperationEnum.Insert, NotifyInfo.SourceEnum.Database, uris));
                            break;
                        }
                    }
                }
                else if (e.Condition == "migration")
                {
                    TraceSource.TraceEvent(TraceEventType.Information, 5155, "Postgres migration detected: {0} ", e.AdditionalInformation);
                    SystemState.Notify(new SystemEvent("migration", e.AdditionalInformation));
                }
            }
            catch (Exception ex)
            {
                TraceSource.TraceEvent(TraceEventType.Error, 5138, "{0}{1} {2}", e.Condition, e.AdditionalInformation, ex);
            }
        }