public override void SendThreading()
{
LastSendTime = DateTime.Now;
Telegram tel = null;
while (Thread.CurrentThread.ThreadState == ThreadState.Background)
{
try
{
lock (_lockSendTelegram)
tel = SendTelegrams.FirstOrDefault(prop => prop.CommSendStatus < Telegram.CommSendStatusEnum.Ack);
if (tel != null)
{
if (INotifyTelegramCallBack == null)
{
throw new TelegramException(String.Format("Callback for {0} is not registered.", Name));
}
INotifyTelegramCallBack?.Invoke(tel);
Log?.AddLog(Log.Severity.EVENT, Name, "MFCSCommunicator.SendThreading Telegram written", tel.ToString());
do
{
WaitHandle.WaitAny(new WaitHandle[] { _newSendNotifyTelegram }, (int)SendTimeOut.TotalMilliseconds, true); // TODO it is a long time
Telegram tel1 = null;
lock (_lockSendNotifyTelegram)
tel1 = SendNotifyTelegrams.FirstOrDefault();
if (tel1 == null)
{
if (!INotifyLongWait.Invoke(tel))
{
throw new TelegramException("Long wait without knowledge of service communicator...");
}
}
if (tel1 != null)
{
// check if both telegrams are completely identical
tel.Sequence = tel1.Sequence;
tel1.CommSendStatus = tel.CommSendStatus;
tel.SetCRC();
tel1.SetCRC();
if (tel.CRC != tel1.CRC)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "MFCSCommunicator.SendThreadind:tel={0}", tel.ToString());
Log?.AddLog(Log.Severity.EXCEPTION, Name, "MFCSCommunicator.SendThreadind:tel1={0}", tel1.ToString());
throw new TelegramException(String.Format("SendNotify telegram CRC does not match ({0},{1})", tel.CRC, tel1.CRC));
}
lock (_lockSendTelegram)
SendTelegrams.Remove(tel);
lock (_lockSendNotifyTelegram)
SendNotifyTelegrams.Remove(tel1);
Log?.AddLog(Log.Severity.EVENT, Name, "MFCSCommunicator.SendThreading send phase finished", tel.ToString());
tel = null;
}
} while (tel != null);
}
else
{
WaitHandle.WaitAny(new WaitHandle[] { _newSendTelegram, _newSendNotifyTelegram }, 100, true);
}
}
catch (TelegramException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "MFCSCommunicator.SendThread::TelegramException", ex.Message);
Thread.Sleep(1000);
}
}
// Main thread for sending telegrams
private void SendThreading()
{
TelegramACK telAck = null;
try
{
if (SimulateMFCS)
{
SendListener = new TcpListener(SendIPEndPoint);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", SendIPEndPoint.ToString());
SendListener.Start();
}
lock (_lockSendTelegram)
{
SendTelegrams.RemoveAll(p => p.CommSendStatus >= Telegram.CommSendStatusEnum.Ack);
}
LastSendTime = DateTime.Now;
while (Thread.CurrentThread.ThreadState == ThreadState.Background)
{
try
{
Telegram tel = null;
lock (_lockSendTelegram)
tel = SendTelegrams.FirstOrDefault(prop => prop.CommSendStatus < Telegram.CommSendStatusEnum.Ack);
if (DateTime.Now - LastSendTime > SendTimeOut)
{
InitSendSocket();
if (tel != null)
{
tel.CommSendStatus = Telegram.CommSendStatusEnum.None;
}
LastSendTime = DateTime.Now;
Retry = 0;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", "Send timeout, SendSocket reinitialized!");
}
else if (DateTime.Now - LastSendTime > KeepALifeTime && tel == null)
{
Telegram tRes = null;
lock (_lockSendTelegram)
tRes = SendTelegrams.FirstOrDefault(prop => prop.CommSendStatus < Telegram.CommSendStatusEnum.Ack);
if (tRes == null)
{
if (KeepALifeTelegram != null)
{
Telegram t = Activator.CreateInstance(KeepALifeTelegram.GetType()) as Telegram;
t.Sender = MFCS_ID;
t.Receiver = PLC_ID;
t.Build();
AddSendTelegram(t);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Adding KeepALife telegram"));
}
}
}
else if (!SendSocket.Connected)
{
InitSendSocket();
ConnectSendPartner();
}
else if (tel != null)
{
switch (tel.CommSendStatus)
{
case (Telegram.CommSendStatusEnum.None):
tel.Sequence = Sequence;
tel.Build();
// Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Start sending {0}", tel.ToString()));
SendSocket.Send(tel.ByteBuffer, tel.Length, SocketFlags.None);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Sended {0}", tel.ToString()));
tel.CommSendStatus = Telegram.CommSendStatusEnum.WaitACK;
telAck = new TelegramACK();
SendTime = DateTime.Now;
break;
case (Telegram.CommSendStatusEnum.WaitACK):
int numRead = 0;
do
{
numRead += SendSocket.Receive(telAck.ByteBuffer, numRead, telAck.ByteBuffer.Length - numRead, SocketFlags.None);
} while (numRead < telAck.ByteBuffer.Length);
telAck.ReadBuffer();
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Received ACK {0}", telAck.ToString()));
if (telAck.Validate() && telAck.Sequence == tel.Sequence)
{
tel.CommSendStatus = Telegram.CommSendStatusEnum.Ack;
LastSendTime = DateTime.Now;
Retry = 0;
if (Sequence < 99)
{
Sequence++;
}
else
{
Sequence = 0;
}
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", String.Format("Send Finished : {0}", tel.ToString()));
NotifySend(tel);
}
else
{
// tel.CommSendStatus = Telegram.CommSendStatusEnum.None;
Retry++;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", String.Format("Retry increased - {0}", Retry));
}
break;
default:
break;
}
}
else
{
Thread.Sleep(100);
}
}
catch (SocketException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::SocketException", ex.Message);
Thread.Sleep(1000);
}
}
catch (TelegramException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::TelegramException", ex.Message);
Thread.Sleep(1000);
}
catch (ThreadAbortException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Communication", ex.Message);
return;
}
catch (CommunicationException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::CommunicationException", ex.Message);
Thread.Sleep(1000);
}
}