Opc.Ua.Server.CustomNodeManager2.AddRootNotifier C# (CSharp) Method

        protected virtual void AddRootNotifier(NodeState notifier)
        {
            if (m_rootNotifiers == null)
            {
                m_rootNotifiers = new List<NodeState>();
            }

            bool mustAdd = true;

            for (int ii = 0; ii < m_rootNotifiers.Count; ii++)
            {
                if (Object.ReferenceEquals(notifier, m_rootNotifiers[ii]))
                {
                    return;
                }

                if (m_rootNotifiers[ii].NodeId == notifier.NodeId)
                {
                    m_rootNotifiers[ii] = notifier;
                    mustAdd = false;
                    break;
                }
            }

            if (mustAdd)
            {
                m_rootNotifiers.Add(notifier);
            }

            // need to prevent recursion with the server object.
            if (notifier.NodeId != ObjectIds.Server)
            {
                notifier.OnReportEvent = OnReportEvent;

                if (!notifier.ReferenceExists(ReferenceTypeIds.HasNotifier, true, ObjectIds.Server))
                {
                    notifier.AddReference(ReferenceTypeIds.HasNotifier, true, ObjectIds.Server);
                }
            }

            // subscribe to existing events.
            if (m_server.EventManager != null)
            {
                IList<IEventMonitoredItem> monitoredItems = m_server.EventManager.GetMonitoredItems();

                for (int ii = 0; ii < monitoredItems.Count; ii++)
                {
                    if (monitoredItems[ii].MonitoringAllEvents)
                    {
                        SubscribeToEvents(
                            SystemContext,
                            notifier,
                            monitoredItems[ii],
                            true);
                    }
                }
            }
        }