change Connect() to use async connect call and honor receiveTimeoutMs…

src/KafkaNET.Library/KafkaConnection.cs

@@ -191,21 +191,21 @@ public override string ToString()
 
         private void Connect()
         {
-            if (socket != null)
+            var watch = Stopwatch.StartNew();
+            if (this.socket != null)
             {
                 try
                 {
                     CloseConnection();
                 }
                 catch (Exception e)
                 {
-                    Logger.Error(this.ToString() + ExceptionUtil.GetExceptionDetailInfo(e));
+                    Logger.Error(string.Format("KafkaConnectio.Connect() exception in CloseConnection, duration={0}ms", watch.ElapsedMilliseconds), e);
                 }
             }
 
             this.socket = null;
 
-
             IPAddress targetAddress;
             if (IPAddress.TryParse(server, out targetAddress))
             {
@@ -220,12 +220,23 @@ private void Connect()
                         ReceiveBufferSize = bufferSize
                     };
 
-                    newSocket.Connect(targetAddress, port);
-                    socket = newSocket;
+                    var result = newSocket.BeginConnect(targetAddress, port, null, null);
+                    // use receiveTimeoutMs as connectionTimeoutMs
+                    result.AsyncWaitHandle.WaitOne(this.receiveTimeoutMs, true);
+                    result.AsyncWaitHandle.Close();
+
+                    if (newSocket.Connected)
+                    {
+                        this.socket = newSocket;
+                    }
+                    else
+                    {
+                        newSocket.Close();
+                    }
                 }
                 catch (Exception ex)
                 {
-                    Logger.Error(this.ToString() + ExceptionUtil.GetExceptionDetailInfo(ex));
+                    Logger.Error(string.Format("KafkaConnectio.Connect() failed, duration={0}ms,this={1},targetAddress={2}", watch.ElapsedMilliseconds, this, targetAddress), ex);
                     throw new UnableToConnectToHostException(targetAddress.ToString(), port, ex);
                 }
             }
@@ -243,33 +254,50 @@ private void Connect()
                     try
                     {
                         var newSocket = new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
+                                        {
+                                            NoDelay = true,
+                                            ReceiveTimeout = this.receiveTimeoutMs,
+                                            SendTimeout = this.sendTimeoutMs,
+                                            SendBufferSize = bufferSize,
+                                            ReceiveBufferSize = bufferSize
+                                        };
+
+                        var result = newSocket.BeginConnect(address, port, null, null);
+                        // use receiveTimeoutMs as connectionTimeoutMs
+                        result.AsyncWaitHandle.WaitOne(this.receiveTimeoutMs, true);
+                        result.AsyncWaitHandle.Close();
+
+                        if (!newSocket.Connected)
                         {
-                            NoDelay = true,
-                            ReceiveTimeout = this.receiveTimeoutMs,
-                            SendTimeout = this.sendTimeoutMs,
-                            SendBufferSize = bufferSize,
-                            ReceiveBufferSize = bufferSize
-                        };
-
-                        newSocket.Connect(address, port);
-                        socket = newSocket;
+                            newSocket.Close();
+                            continue;
+                        }
+
+                        this.socket = newSocket;
                         break;
                     }
                     catch (Exception e)
                     {
+                        Logger.Error(string.Format("ErrorConnectingToAddress, duration={0}ms,address={1},server={2},port={3}", watch.ElapsedMilliseconds, address, server, port), e);
                         throw new UnableToConnectToHostException(server, port, e);
                     }
                 }
             }
 
             if (socket == null)
             {
+                Logger.ErrorFormat("UnableToConnectToHostException, duration={0}ms,server={1},port={2}", watch.ElapsedMilliseconds, server, port);
                 throw new UnableToConnectToHostException(server, port);
             }
 
-            this.stream = new NetworkStream(socket, true);
-            this.stream.ReadTimeout = networkStreamReadTimeoutMs;
-            this.stream.WriteTimeout = networkStreamWriteTimeoutMs;
+            Logger.DebugFormat("KafkaConnection.Connect() succeeded, duration={0}ms,server={1},port={2}",
+                               watch.ElapsedMilliseconds, server, port); 
+
+            this.stream = new NetworkStream(socket, true)
+                          {
+                              ReadTimeout = this.networkStreamReadTimeoutMs,
+                              WriteTimeout = this.networkStreamWriteTimeoutMs
+                          };
             this.reader = new KafkaBinaryReader(stream);
             Connected = true;
             this.lastActiveTimeMs = Environment.TickCount;