private EasyModbus.ModbusClient TryGetConnectedClient(string ip, int port)
{
lock (_clientLock)
{
var modbusDescriptor = ModbusServerDescriptor.Create(ip, port);
var client = _modbusClientCache.GetValueOrDefault(modbusDescriptor);
if (client == null)
{
client = new EasyModbus.ModbusClient(ip, port);
_modbusClientCache.Add(modbusDescriptor, client);
}
try
{
if (!client.Connected)
{
client.Connect();
}
}
catch (Exception exception)
{
Logger.Error("ModbusTcp connection error", exception);
client.Disconnect();
_modbusClientCache.Remove(modbusDescriptor);
throw exception;
}
return(client);
}
}
private void RemoveDeadClient(string ip, int port)
{
lock (_clientLock)
{
var modbusDescriptor = ModbusServerDescriptor.Create(ip, port);
if (_modbusClientCache.ContainsKey(modbusDescriptor))
{
_modbusClientCache[modbusDescriptor].Disconnect();
_modbusClientCache.Remove(modbusDescriptor);
}
}
}
