Opc.Ua.Client.Session.OnKeepAlive C# (CSharp) Method

        protected virtual void OnKeepAlive(ServerState currentState, DateTime currentTime)
        {
            // restart publishing if keep alives recovered.
            if (KeepAliveStopped)
            {
                // ignore if already reconnecting.
                if (m_reconnecting)
                {
                    return;
                }

                int count = 0;

                lock (m_outstandingRequests)
                {
                    for (LinkedListNode<AsyncRequestState> ii = m_outstandingRequests.First; ii != null; ii = ii.Next)
                    {
                        if (ii.Value.RequestTypeId == DataTypes.PublishRequest)
                        {
                            ii.Value.Defunct = true;
                        }
                    }
                }

                lock (SyncRoot)
                {
                    count = m_subscriptions.Count;
                }

                while (count-- > 0)
                {                
                    BeginPublish(OperationTimeout);
                }
            }

            KeepAliveEventHandler callback = null;

            lock (m_eventLock)
            {
                callback = m_KeepAlive;
                
                // save server state.
                m_serverState = currentState;
                m_lastKeepAliveTime = DateTime.UtcNow;
            }

            if (callback != null)
            {
                try
                {
                    callback(this, new KeepAliveEventArgs(null, currentState, currentTime));
                }
                catch (Exception e)
                {
                    Utils.Trace(e, "Session: Unexpected error invoking KeepAliveCallback.");
                }
            }
        }