//Single bot has finished
private void onBotComplete(IAsyncResult ar)
{
try
{
launchDelegate ld = (launchDelegate)ar.AsyncState;
ld.EndInvoke(ar);
}
catch (Exception x)
{
el.WriteEntry($"Method onBotComplete failed with error: {x.Message}");
}
}
// When a file arrives, launch a single bot asynchronously, so that monitoring may continue.
private void OnNewFileReceived(object source, FileSystemEventArgs e)
{
try
{
string triggerPath = e.FullPath; //This is the path to the {guid}.input file
el.WriteEntry($"Received new file {triggerPath}.");
FileInfo fi = new FileInfo(triggerPath);
string[] fileParts = fi.Name.Split('.');
Guid candidate = Guid.Empty;
try
{
candidate = Guid.Parse(fileParts[0]);
}
catch
{
el.WriteEntry($"Skipping Invalid file \"{triggerPath}\".", EventLogEntryType.Warning);
return;
}
//So now you have a file names {guid}.input. Read it and make sure it's valid
//The following is how to asynchronously make a C# method call.
AsyncCallback cb = new AsyncCallback(onBotComplete); //The callback fires when the bot is complete.
//With everything set up, the following calls createBot and returns immediately to monitoring
//1. botPath is the full path of the {guid}.input file
//2. out fileName is just the filename portion. This is done so that the callback can correlate the input with the output
//3. cb is the callback method (onBotsComplete)
//4. ld is the launch delegate object again.
//IAsyncResult ar = ld.BeginInvoke(botPath, out fileName, cb, ld);
launchDelegate ld = new launchDelegate(launchIntermediate); //The delegate, declared above, can just take a method name
IAsyncResult ar = ld.BeginInvoke(triggerPath, candidate, cb, ld);
}
catch (Exception x) //Log and continue so that no particular input file can gum up the works
{
el.WriteEntry($"Unexpected error in method \"OnNewFileReceived\": {x.Message}", EventLogEntryType.Error);
}
}
