Kafka.Client.ZooKeeperIntegration.Listeners.BrokerTopicsListener.HandleChildChange C# (CSharp) Метод

        public void HandleChildChange(ZooKeeperChildChangedEventArgs e)
        {
            Guard.NotNull(e, "e");
            Guard.NotNullNorEmpty(e.Path, "e.Path");
            Guard.NotNull(e.Children, "e.Children");

            lock (this.syncLock)
            {
                try
                {
                    string path = e.Path;
                    IList<string> childs = e.Children;
                    Logger.Debug("Watcher fired for path: " + path);
                    switch (path)
                    {
                        case ZooKeeperClient.DefaultBrokerTopicsPath:
                            List<string> oldTopics = this.oldBrokerTopicsPartitionsMap.Keys.ToList();
                            List<string> newTopics = childs.Except(oldTopics).ToList();
                            Logger.Debug("List of topics was changed at " + e.Path);
                            Logger.Debug("Current topics -> " + e.Children.ToMultiString(","));
                            Logger.Debug("Old list of topics -> " + oldTopics.ToMultiString(","));
                            Logger.Debug("List of newly registered topics -> " + newTopics.ToMultiString(","));
                            foreach (var newTopic in newTopics)
                            {
                                string brokerTopicPath = ZooKeeperClient.DefaultBrokerTopicsPath + "/" + newTopic;
                                IList<string> brokerList = this.zkclient.GetChildrenParentMayNotExist(brokerTopicPath);
                                this.ProcessNewBrokerInExistingTopic(newTopic, brokerList);
                                this.zkclient.Subscribe(ZooKeeperClient.DefaultBrokerTopicsPath + "/" + newTopic, this);
                            }

                            break;
                        case ZooKeeperClient.DefaultBrokerIdsPath:
                            Logger.Debug("List of brokers changed in the Kafka cluster " + e.Path);
                            Logger.Debug("Currently registered list of brokers -> " + e.Children.ToMultiString(","));
                            this.ProcessBrokerChange(path, childs);
                            break;
                        default:
                            string[] parts = path.Split('/');
                            string topic = parts.Last();
                            if (parts.Length == 4 && parts[2] == "topics" && childs != null)
                            {
                                Logger.Debug("List of brokers changed at " + path);
                                Logger.Debug(
                                    "Currently registered list of brokers for topic " + topic + " -> " +
                                    childs.ToMultiString(","));
                                this.ProcessNewBrokerInExistingTopic(topic, childs);
                            }

                            break;
                    }

                    this.oldBrokerTopicsPartitionsMap = this.actualBrokerTopicsPartitionsMap;
                    this.oldBrokerIdMap = this.actualBrokerIdMap;
                }
                catch (Exception exc)
                {
                    Logger.Debug("Error while handling " + e, exc);
                }
            }
        }