/// <summary>
/// Retrieve data from the Omnik
/// </summary>
public async Task RetrieveData()
{
Logging.Logdata.LogMessage(TraceLevel.Verbose, string.Format($"Connecting to Omnik at {OmnikAddress}:{OmnikPort} with serialnumber {WifiSerialNumber} to pull data"));
// Initiate the connection to the Omnik asynchronously
TcpClient = new TcpClient(AddressFamily.InterNetwork);
try
{
await TcpClient.ConnectAsync(OmnikAddress, OmnikPort);
}
catch (Exception exception)
{
Logging.Logdata.LogMessage(TraceLevel.Warning, string.Format($"Error while waiting for reply from Omnik at {OmnikAddress}:{OmnikPort} with serialnumber {WifiSerialNumber} in response to the initial statistics request. Exception: { exception.Message}. StackTrace: {exception.StackTrace}."));
throw;
}
if (!TcpClient.Connected)
{
var errorMessage = string.Format($"Unable to connect to Omnik at {OmnikAddress}:{OmnikPort} with serialnumber {WifiSerialNumber} to pull data");
Logging.Logdata.LogMessage(TraceLevel.Verbose, errorMessage);
DataPullSessionFailed?.Invoke(OmnikAddress, OmnikPort, WifiSerialNumber, errorMessage);
return;
}
// Send out the message to the Omnik to request the statistics
SendDataPullMessage(TcpClient);
// Wait for data to be received in response to sending out the data request
var dataBuffer = new byte[DefaultDataBufferLength];
try
{
TcpClient.GetStream().BeginRead(dataBuffer, 0, dataBuffer.Length, HandleReceivedData, dataBuffer);
}
catch (Exception exception)
{
Logging.Logdata.LogMessage(TraceLevel.Warning, string.Format($"Error while waiting for reply from Omnik at {OmnikAddress}:{OmnikPort} with serialnumber {WifiSerialNumber} in response to the initial statistics request. Exception: { exception.Message}. StackTrace: {exception.StackTrace}."));
}
}
/// <summary>
/// Triggered when a data pull session failed
/// </summary>
/// <param name="omnikAddress">IP Address or DNS name of the Omnik</param>
/// <param name="omnikPort">Port number of the Omnik</param>
/// <param name="serialNumber">Serial number of the Omnik</param>
/// <param name="reason">Reason why the connection failed</param>
private void HandleDataPullSessionFailed(string omnikAddress, int omnikPort, string serialNumber, string reason)
{
DataPullSessionFailed?.Invoke(omnikAddress, omnikPort, serialNumber, reason);
}