/// <summary>
/// Read plugin objects created by Server's application
/// </summary>
public void RefreshPlugins()
{
PluginObjects.Clear();
TcpAppCommandResult result = ExecuteTcpAppCommand("Plugins?");
if (result.Status == TcpAppCommandStatus.ERR)
{
throw new TcpAppClientException("Failed to get plugins list from server! " + result.ReturnMessage);
}
if (result.ReturnMessage.Equals("-NONE-"))
{
return;
}
PluginObjects.AddRange(result.ReturnMessage.Split('\r').Select(x => x.Split('(')[0].Trim()).ToArray());
}
/// <summary>
/// Execute TCP Application Client Command.
/// </summary>
/// <param name="command"></param>
/// <param name="timeout"></param>
/// <returns></returns>
private TcpAppCommandResult ExecuteTcpAppCommand(string command, int timeout = 1000)
{
TcpAppCommandResult result = new TcpAppCommandResult();
try
{
SuspendDataReceivedEvent = true;
string commandKeyword = command.Split(' ').First();
//Verify command registered in function list, only active after Connect() sequence completed.
if (Initialized)
{
//Compare command keyword
if (!Commands.Contains(commandKeyword, StringComparer.InvariantCultureIgnoreCase))
{
//Compare plugin object list
if (!PluginObjects.Contains(commandKeyword, StringComparer.InvariantCultureIgnoreCase))
{
RefreshPlugins(); //Get latest plugin objects from server
if (!PluginObjects.Contains(commandKeyword, StringComparer.InvariantCultureIgnoreCase))
{
throw new TcpAppClientException("Invalid Command: " + commandKeyword); //Still no match, FAILED!
}
}
}
}
string tcpCommand = command + TcpAppCommon.Delimiter;
CommandSend?.Invoke(this, new TcpAppClientEventArgs(command));
FlushInputBuffer();
Write(tcpCommand);
DateTime startTime = DateTime.Now;
while ((DateTime.Now - startTime).TotalMilliseconds < timeout)
{
string response = ReadString();
ResponseReceived?.Invoke(this, new TcpAppClientEventArgs(response));
if (!string.IsNullOrEmpty(response))
{
string[] resultParams = response.Split(' ');
//BUSY and Queue statue handle by application
result.Status = (TcpAppCommandStatus)Enum.Parse(typeof(TcpAppCommandStatus), resultParams[0]);
if (resultParams.Length > 1)
{
result.ReturnMessage = string.Join(" ", resultParams.Skip(1)).Trim(); //Remove trailing CRLF
}
return(result);
}
Thread.Sleep(100); //Wait 100ms, retry.
}//while
throw new TcpAppClientException("TIMEOUT: No response received from server!");
}
catch (TcpAppClientException) { throw; }
catch (Exception ex)
{
throw new TcpAppClientException("Exception raised!", ex);
}
finally
{
SuspendDataReceivedEvent = false;
}
}