public void Run()
        {
            try
            {
                var activeClients = _store.GetActiveClientSubscriptions(TimeSpan.FromMilliseconds(_interval));

                if (activeClients != null)
                {
                    OperationContext context = OperationContext.CreateWith(OperationContextFieldName.InternalOperation, true);

                    foreach (KeyValuePair <string, IList <string> > pair in activeClients)
                    {
                        foreach (string client in pair.Value)
                        {
                            if (_context.NCacheLog.IsInfoEnabled)
                            {
                                _context.NCacheLog.Info("SubscriptionRefresher", client + " being refreshed for topic " + pair.Key);
                            }
                            _store.TopicOperation(new SubscriptionOperation(pair.Key, Common.Enum.TopicOperationType.RefreshSubscription,
                                                                            new SubscriptionInfo()
                            {
                                ClientId = client
                            }), context);
                        }
                    }
                }
            }
            catch (Exception e)
            {
                _context.NCacheLog.Error("SubscriptionReresherTask", e.ToString());
            }
        }
        public void Run()
        {
            OperationContext context = null;

            try
            {
                var activeClients = _store.GetActiveClientSubscriptions(TimeSpan.FromMilliseconds(_interval));

                if (activeClients != null)
                {
                    context = OperationContext.CreateAndMarkInUse(_context.TransactionalPoolManager, NCModulesConstants.PubSub, OperationContextFieldName.InternalOperation, true);

                    foreach (KeyValuePair <string, IList <string> > pair in activeClients)
                    {
                        foreach (string client in pair.Value)
                        {
                            if (_context.NCacheLog.IsInfoEnabled)
                            {
                                _context.NCacheLog.Info("SubscriptionRefresher", client + " being refreshed for topic " + pair.Key);
                            }
                            _store.TopicOperation(new SubscriptionOperation(pair.Key, Common.Enum.TopicOperationType.RefreshSubscription,
                                                                            new SubscriptionInfo()
                            {
                                ClientId = client
                            }), context);
                        }
                    }
                }
            }
            catch (Exception e)
            {
                _context.NCacheLog.Error("SubscriptionReresherTask", e.ToString());
            }
            finally
            {
                MiscUtil.ReturnOperationContextToPool(context, _context.TransactionalPoolManager);
                context?.MarkFree(NCModulesConstants.PubSub);
            }
        }