Made the interface disposable and refactoring

Examples/Program.cs

@@ -4,16 +4,35 @@ using MewtocolNet;
 using MewtocolNet.Logging;
 using MewtocolNet.Registers;
 
-namespace Examples {
+namespace Examples;
 
 class Program {
 
     static void Main(string[] args) {
 
+        Console.WriteLine("Enter your scenario number:\n" +
+                          "1 = Permanent connection\n" +
+                          "2 = Dispose connection");
+
+        var line = Console.ReadLine();
+
+        if(line == "1") {
+            Scenario1();
+        }
+
+        if (line == "2") {
+            Scenario2();
+        }
+
+        Console.ReadLine();
+    }
+
+    static void Scenario1 () {
+
         Task.Factory.StartNew(async () => {
 
             //attaching the logger
-                Logger.LogLevel = LogLevel.Verbose;
+            Logger.LogLevel = LogLevel.Critical;
             Logger.OnNewLogMessage((date, msg) => {
                 Console.WriteLine($"{date.ToString("HH:mm:ss")} {msg}");
             });
@@ -42,28 +61,16 @@ namespace Examples {
 
                         await interf.SetRegisterAsync(nameof(registers.TestInt32), 100);
 
-                            _ = Task.Factory.StartNew(async () => {
-                                while(true) {
-                                    for (int i = 0; i < 5; i++) {
-                                        var bytes = await interf.ReadByteRange(1020, 20);
-                                        await interf.SetRegisterAsync(nameof(registers.TestBool1), !registers.TestBool1);
-                                        await interf.SetRegisterAsync(nameof(registers.TestInt32), registers.TestInt32 + 100);
-                                        await Task.Delay(1333);
-                                    }
-                                    await Task.Delay(10000);
-                                }
-                            });
-
                             //adds 10 each time the plc connects to the PLCs INT regíster
-                            //interf.SetRegister(nameof(registers.TestInt16), (short)(registers.TestInt16 + 10));
+                        interf.SetRegister(nameof(registers.TestInt16), (short)(registers.TestInt16 + 10));
                             //adds 1 each time the plc connects to the PLCs DINT regíster
-                            //interf.SetRegister(nameof(registers.TestInt32), (registers.TestInt32 + 1));
+                        interf.SetRegister(nameof(registers.TestInt32), (registers.TestInt32 + 1));
                             //adds 11.11 each time the plc connects to the PLCs REAL regíster
-                            //interf.SetRegister(nameof(registers.TestFloat32), (float)(registers.TestFloat32 + 11.11));
+                        interf.SetRegister(nameof(registers.TestFloat32), (float)(registers.TestFloat32 + 11.11));
                             //writes 'Hello' to the PLCs string register
-                            //interf.SetRegister(nameof(registers.TestString2), "Hello");
+                        interf.SetRegister(nameof(registers.TestString2), "Hello");
                             //set the current second to the PLCs TIME register
-                            //interf.SetRegister(nameof(registers.TestTime), TimeSpan.FromSeconds(DateTime.Now.Second));
+                        interf.SetRegister(nameof(registers.TestTime), TimeSpan.FromSeconds(DateTime.Now.Second));
 
                     });
 
@@ -72,7 +79,51 @@ namespace Examples {
 
         });
 
-            Console.ReadLine();
     }
+
+    static void Scenario2 () {
+
+        Logger.LogLevel = LogLevel.Critical;
+        Logger.OnNewLogMessage((date, msg) => {
+            Console.WriteLine($"{date.ToString("HH:mm:ss")} {msg}");
+        });
+
+        Task.Factory.StartNew(async () => {
+
+            using(var interf = new MewtocolInterface("10.237.191.3")) {
+
+                await interf.ConnectAsync();
+
+                if(interf.IsConnected) {
+
+                    var plcInf = await interf.GetPLCInfoAsync();
+                    Console.WriteLine(plcInf);
+
                 }
+
+                interf.Disconnect();
+
+            }
+
+
+            using (var interf = new MewtocolInterface("10.237.191.3")) {
+
+                await interf.ConnectAsync();
+
+                if (interf.IsConnected) {
+
+                    var plcInf = await interf.GetPLCInfoAsync();
+                    Console.WriteLine(plcInf);
+
+                }
+
+                interf.Disconnect();
+
+            }
+
+
+        });
+
+    }
+
 }

MewtocolNet/Mewtocol/DynamicInterface.cs

@@ -15,7 +15,6 @@ namespace MewtocolNet {
     public partial class MewtocolInterface {
 
         internal event Action PolledCycle;
-        internal CancellationTokenSource cTokenAutoUpdater;
         internal bool ContinousReaderRunning;
         internal bool usePoller = false;
 
@@ -24,7 +23,6 @@ namespace MewtocolNet {
         internal void KillPoller () {
 
             ContinousReaderRunning = false;
-            cTokenAutoUpdater?.Cancel();
 
         }
 
@@ -38,21 +36,26 @@ namespace MewtocolNet {
 
             Task.Factory.StartNew(async () => {
 
-                cTokenAutoUpdater = new CancellationTokenSource();
-
                 Logger.Log("Poller is attaching", LogLevel.Info, this);
 
                 int it = 0;
+                ContinousReaderRunning = true;
 
-                while (it < Registers.Count + 1) {
+                while (ContinousReaderRunning) {
 
-                    if (it >= Registers.Count) {
+                    if (it >= Registers.Count + 1) {
                         it = 0;
                         //invoke cycle polled event
                         InvokePolledCycleDone();
                         continue;
                     }
 
+                    if (it >= Registers.Count) {
+                        await GetPLCInfoAsync();
+                        it++;
+                        continue;
+                    }
+
                     var reg = Registers[it];
 
                     if (reg is NRegister<short> shortReg) {

MewtocolNet/Mewtocol/MewtocolInterface.cs

@@ -21,7 +21,7 @@ namespace MewtocolNet {
     /// <summary>
     /// The PLC com interface class
     /// </summary>
-    public partial class MewtocolInterface : INotifyPropertyChanged {
+    public partial class MewtocolInterface : INotifyPropertyChanged, IDisposable {
 
         /// <summary>
         /// Gets triggered when the PLC connection was established
@@ -43,6 +43,15 @@ namespace MewtocolNet {
         /// </summary>
         public event PropertyChangedEventHandler PropertyChanged;
 
+        private int connectTimeout = 1000;
+        /// <summary>
+        /// The initial connection timeout in milliseconds
+        /// </summary>
+        public int ConnectTimeout {
+            get { return connectTimeout; }
+            set { connectTimeout = value; }
+        }
+
         private bool isConnected;
         /// <summary>
         /// The current connection state of the interface
@@ -55,6 +64,16 @@ namespace MewtocolNet {
             }
         }
 
+        private bool disposed;
+        /// <summary>
+        /// True if the current interface was disposed
+        /// </summary>
+        public bool Disposed {
+            get { return disposed; }
+            private set { disposed = value; }
+        }
+
+
         private PLCInfo plcInfo;
         /// <summary>
         /// Generic information about the connected PLC
@@ -75,6 +94,7 @@ namespace MewtocolNet {
         private string ip;
         private int port;
         private int stationNumber;
+        private int cycleTimeMs = 25;
 
         /// <summary>
         /// The current IP of the PLC connection
@@ -89,7 +109,6 @@ namespace MewtocolNet {
         /// </summary>
         public int StationNumber => stationNumber;
 
-        private int cycleTimeMs = 25;
         /// <summary>
         /// The duration of the last message cycle
         /// </summary>
@@ -135,7 +154,6 @@ namespace MewtocolNet {
             RegisterChanged += (o) => {
 
                 string address = $"{o.GetRegisterString()}{o.MemoryAdress}".PadRight(5, (char)32);
-                ;
 
                 Logger.Log($"{address} " +
                            $"{(o.Name != null ? $"({o.Name}) " : "")}" +
@@ -200,14 +218,14 @@ namespace MewtocolNet {
         }
 
         /// <summary>
-        /// Closes all permanent polling 
+        /// Closes the connection all cyclic polling 
         /// </summary>
         public void Disconnect () {
 
             if (!IsConnected)
                 return;
 
-            OnMajorSocketException();
+            OnMajorSocketExceptionWhileConnected();
 
         }
 
@@ -225,6 +243,70 @@ namespace MewtocolNet {
 
         #endregion
 
+        #region TCP connection state handling
+
+        private async Task ConnectTCP () {
+
+            if (!IPAddress.TryParse(ip, out var targetIP)) {
+                throw new ArgumentException("The IP adress of the PLC was no valid format");
+            }
+
+            try {
+
+                client = new TcpClient() {
+                    ReceiveBufferSize = RecBufferSize,
+                    NoDelay = false,
+                    ExclusiveAddressUse = true,
+                };
+
+                var result = client.BeginConnect(targetIP, port, null, null);
+                var success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromMilliseconds(ConnectTimeout));
+
+                if(!success) {
+                    OnMajorSocketExceptionWhileConnecting();
+                    return;
+                }
+
+                stream = client.GetStream();
+                stream.ReadTimeout = 1000;
+
+                Console.WriteLine($"Connected {client.Connected}");
+                await Task.CompletedTask;
+
+            } catch (SocketException) {
+
+                OnMajorSocketExceptionWhileConnecting();
+
+            }
+
+        }
+
+        private void OnMajorSocketExceptionWhileConnecting () {
+
+            Logger.Log("The PLC connection timed out", LogLevel.Error, this);
+            CycleTimeMs = 0;
+            IsConnected = false;
+            KillPoller();
+
+        }
+
+        private void OnMajorSocketExceptionWhileConnected () {
+
+            if (IsConnected) {
+
+                Logger.Log("The PLC connection was closed", LogLevel.Error, this);
+                CycleTimeMs = 0;
+                IsConnected = false;
+                Disconnected?.Invoke();
+                KillPoller();
+                client.Close();
+
+            }
+
+        }
+
+        #endregion
+
         #region Register Collection
 
         /// <summary>
@@ -547,25 +629,6 @@ namespace MewtocolNet {
 
         #region Low level command handling
 
-        private async Task ConnectTCP () {
-
-            var targetIP = IPAddress.Parse(ip);
-
-            client = new TcpClient() {
-                ReceiveBufferSize = RecBufferSize,
-                NoDelay = false,
-                ExclusiveAddressUse = true
-            };
-
-            await client.ConnectAsync(targetIP, port);
-
-            stream = client.GetStream();
-            stream.ReadTimeout = 1000;
-
-            Console.WriteLine($"Connected {client.Connected}");
-
-        }
-
         /// <summary>
         /// Calculates checksum and sends a command to the PLC then awaits results
         /// </summary>
@@ -668,12 +731,12 @@ namespace MewtocolNet {
                 Logger.Log($"Critical IO exception on receive", LogLevel.Critical, this);
                 return null;
             } catch (SocketException) {
-                OnMajorSocketException();
+                OnMajorSocketExceptionWhileConnected();
                 return null;
             }
 
             if(!string.IsNullOrEmpty(response.ToString())) {
-                Logger.Log($"<-- IN MSG (TXT): {response} ({response.Length} bytes)", LogLevel.Critical, this);
+                Logger.Log($"<-- IN MSG: {response}", LogLevel.Critical, this);
                 return response.ToString();
             } else {
                 return null;
@@ -681,17 +744,22 @@ namespace MewtocolNet {
 
         }
 
-        private void OnMajorSocketException () {
+        #endregion
 
-            if (IsConnected) {
+        #region Disposing
 
-                Logger.Log("The PLC connection was closed", LogLevel.Error, this);
+        /// <summary>
-                CycleTimeMs = 0;
+        /// Disposes the current interface and clears all its members
-                IsConnected = false;
+        /// </summary>
-                Disconnected?.Invoke();
+        public void Dispose () {
-                KillPoller();
 
-            }
+            if (Disposed) return;
+
+            Disconnect();
+
+            GC.SuppressFinalize(this);
+
+            Disposed = true;
 
         }