public SubscriptionView GetSubscription(GetSubscriptionQuery query)
        {
            using (var views = new EntileViews())
            {
                var client = (from c in views.ClientViews.Include("Subscriptions.ExtendedInformation")
                              where c.ClientId == query.ClientId
                              select c).SingleOrDefault();

                if (client == null)
                    return null;

                return client.Subscriptions.Where(s => s.SubscriptionId == query.SubscriptionId).SingleOrDefault();
            }
        }
        public SubscriptionResponse Get(Guid clientId, Guid subscriptionId)
        {
            var queries = new ClientQueries();
            var query = new GetSubscriptionQuery() {ClientId = clientId, SubscriptionId = subscriptionId};
            var subscription = queries.GetSubscription(query);
            if (subscription == null)
                throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));

            var response = new SubscriptionResponse()
                               {
                                   ClientId = subscription.ClientId,
                                   SubscriptionId = subscription.SubscriptionId,
                                   NotificationKind =
                                       ((Server.Domain.NotificationKind) subscription.NotificationKind).ToString(),
                                   ParamUri = subscription.ParamUri,
                                   ExtendedInformation = subscription.ExtendedInformation.ToDictionary(ei => ei.Key, ei => ei.Value)
                               };
            _applier.Apply(Request, response);

            return response;
        }