public interface IServiceConnectorDevice
{
        /// <summary>
        /// 支行设备连接器
        /// </summary>
        /// <param name="fromService"></param>
        /// <param name="toDevice"></param>
        /// <returns></returns>
        object RunServiceConnector(IFromService fromService, IServiceToDevice toDevice);
}

12.3 服务链接器

IService接口继承自IServiceConnector服务链接器，代表服务具备两大职能：1、向设备驱动发送命令或信息。2、接收设备驱动处理命令或信息的结果。代码如下：

public interface IServiceConnector
    {
        /// <summary>
        /// 设备连接器回调函数，在这里写回调的处理结果
        /// </summary>
        /// <param name="obj"></param>
        void ServiceConnectorCallback(object obj);

        /// <summary>
        /// 如果执行方出现异常，则返回给这个函数结果
        /// </summary>
        /// <param name="ex"></param>
        void ServiceConnectorCallbackError(Exception ex);

        /// <summary>
        /// 连接器事件，发起端
        /// </summary>
        event ServiceConnectorHandler ServiceConnector;

        /// <summary>
        /// 确发事件接口
        /// </summary>
        /// <param name="fromService"></param>
        /// <param name="toDevice"></param>
        void OnServiceConnector(IFromService fromService, IServiceToDevice toDevice);
}

12.4 场景假设

设备驱动实时采集传感器的数据信息，然后通过OnDeviceObjectChanged事件接口把数据信息传递给服务实例UpdateDevice接口函数，然后进行数据的缓存。开启服务线程，连接云端服务并且定时上传传感器的数据信息。云端服务下发控制指令command:control:1（注：命令控制1号编码设备），然后设备驱动把命令下发给传感器，最终把结果返回给服务实例。

12.5 设备驱动开发及注意事项

1.给服务实例传递数据信息，通过OnDeviceObjectChanged事件。代码如下：

List<string> list = new List<string>();
list.Add(_devicePara.DeviceCode);
list.Add(_devicePara.DeviceName);
list.Add(_deviceDyn.Dyn.Flow.ToString());
list.Add(_deviceDyn.Dyn.Signal.ToString());
OnDeviceObjectChanged(list.ToArray());

2.接收服务实例传递的命令和信息。代码如下：

 public override object RunServiceConnector(IFromService fromService, IServiceToDevice toDevice)
        {
            Console.WriteLine(this.DeviceParameter.DeviceName+",接收到云端指令:"+toDevice.Text);
            return this.DeviceParameter.DeviceName+",执行完成";
        }

12.6 服务实例开发及注意事项

服务实例主要的职能是：缓存数据、连接云端服务并定时发送数据、接收云端命令信息并传递给设备驱动、接收驱动执行命令信息的结果。

缓存数据，代码如下：

public override void UpdateDevice(string devCode, object obj)
        {
            lock (_SyncObject)
            {
                if (obj != null)
                {
                    if (obj is string[])
                    {
                        string[] arr = (string[])obj;
                        //OnServiceLog(String.Format("服务：{0} 接收到\'{1}\'的数据>>{2},{3}", ServiceName, arr[1], arr[2], arr[3]));
                        if (arr.Length >= 2)
                        {
                            if (this._Cache.ContainsKey(devCode)) //判断ID
                            {
                                this._Cache[devCode] = arr;
                            }
                            else
                            {
                                this._Cache.Add(devCode, arr);
                            }
                        }
                    }
                }
            }
        }

2.连接云端服务并定时发送数据，代码如下：

private void Target_Service()
        {
            while (_IsRun)
            {
                try
                {
                    if (_tcpClient != null)
                    {
                        lock (_SyncObject)
                        {
                            string content = String.Empty;
                            foreach (KeyValuePair<string, string[]> kv in _Cache)
                            {
                                content += String.Join(",", kv.Value) + Environment.NewLine;
                            }

                            if (!String.IsNullOrEmpty(content))
                            {
                                byte[] data = System.Text.Encoding.ASCII.GetBytes(content);
                                this.OnSend(data);
                            }
                        }
                    }
                    else
                    {
                        this.ConnectServer();
                    }
                }
                catch (SocketException ex)
                {
                    this.CloseSocket();
                    OnServiceLog(ex.Message);
                }
                catch (Exception ex)
                {
                    OnServiceLog(ex.Message);
                }
                finally
                {
                    System.Threading.Thread.Sleep(2000);
                }
            }
        }

3.接收云端命令信息并传递给设备驱动

private void ReceiveCallback(IAsyncResult ar)
        {
            TcpClient socket = (TcpClient)ar.AsyncState;
            try
            {
                if (socket != null)
                {
                    int read = socket.Client.EndReceive(ar);
                    if (read > 0)
                    {
                        //处理数据.....................通知设备
                        string text = System.Text.Encoding.ASCII.GetString(_Buffer, 0, read);
                        OnServiceConnector(new FromService(this.ServiceName,this.ServiceKey),new ServiceToDevice("1",text,null,null) );
                        OnReceive();
                    }
                    else
                    {
                        this.CloseSocket();
                    }
                }
            }
            catch (SocketException ex)
            {
                this.CloseSocket();
                this.OnServiceLog(ex.Message);
            }
            catch (Exception ex)
            {
                this.OnServiceLog(ex.Message);
            }
        }

4.接收驱动执行命令信息的结果

public override void ServiceConnectorCallback(object obj)
        {
            OnServiceLog(obj.ToString());
            OnServiceLog("设备已经处理完成指令");
        }

12.7 宿主程序服务实例配置注意事项

static void Main(string[] args)
        {
            DeviceSelfDriver dev2 = new DeviceSelfDriver();
            dev2.DeviceParameter.DeviceName = "网络设备";
            dev2.DeviceParameter.DeviceAddr = 1;
            dev2.DeviceParameter.DeviceID = "1";
            dev2.DeviceDynamic.DeviceID = "1";
            dev2.DeviceParameter.DeviceCode = "1";
            dev2.DeviceParameter.NET.RemoteIP = "127.0.0.1";
            dev2.DeviceParameter.NET.RemotePort = 9600;
            dev2.CommunicateType = CommunicateType.NET;
            dev2.Initialize("1");
 
            IServer server = new ServerManager().CreateServer(new ServerConfig()
            {
                ServerName = "服务1",
                ComReadTimeout = 1000,
                ComWriteTimeout = 1000,
                NetReceiveTimeout = 1000,
                NetSendTimeout = 1000,
                ControlMode = ControlMode.Self,
                SocketMode = SocketMode.Tcp,
                StartReceiveDataFliter = true,
                ClearSocketSession = false,
                StartCheckPackageLength = true,
                CheckSameSocketSession = false,
                DeliveryMode = DeliveryMode.DeviceCode,
            });
            server.AddDeviceCompleted += server_AddDeviceCompleted;
            server.DeleteDeviceCompleted+=server_DeleteDeviceCompleted;
            server.Start();

            server.AddDevice(dev2);

            TestService.Service service=new TestService.Service();
            service.IsAutoStart = true;
            server.AddService(service);
 
            while ("exit" == Console.ReadLine())
            {
                server.Stop();
            }
        }