[Quickfix-developers] Quick Fix - Initiator Not releasing resources on exception

[Lloyd, R. <Rob...@st...>]

Hi All,
I am using the QuickFix engine in a C# windows service and building an
Initiator that restarts following any exceptions. I am testing this by
throwing exceptions within the Applications event handling methods.
Currently if I do this I get the exception I expect first time through
but then when I try and set up the Initiator again I get the following
exception:

Message = "Configuration failed: Could not open body file:
C:\\PROJECTS_DOTNET\\QuickFix
Service\\FixService\\files\\FIX.4.4-A-B.body"

Now I know the file exists as it works the first time and if I try and
open the file this is denied:

The process cannot access the file because it is being used by another
process.

Which leads me to believe that something is not releasing the resources
on this file. Is there a way I can manually free up the resources or
would something need to be altered within the QuickFix libraries
themselves? Or am I simply handling this in the wrong manner? I have
attached the method that handles this process below.

Thanks in advance
Rob


		
private void StartMorcomMonitor()
        {
            Initiator initiator = null;
            SessionSettings settings = null;
            FileStoreFactory storeFactory = null;
            Application application = null;
            ScreenLogFactory logFactory = null;
            MessageFactory messageFactory = null;

            try
            {
                String SettingsFilePath =
ConfigurationManager.AppSettings["SettingsFilePath"];
                settings = new SessionSettings(SettingsFilePath);
                application = new Application(); //main work handling
class
                storeFactory = new FileStoreFactory(settings);
                logFactory = new ScreenLogFactory(true, true, true);
                messageFactory = new DefaultMessageFactory();

                //create the Quickfix application
                initiator = 
                            new ThreadedSocketInitiator(application,
storeFactory, 
                                                        settings,
logFactory, messageFactory);
                initiator.start();

                //if service state has changed inform it support
                if (m_ConnectionsUp == false)
                {
                    m_ConnectionsUp = true;
                    Informer.SendEmail("Morcom service is available
again", false, true);
                }

                // Keep the Morcom monitor thread running until SCM
issues a stop request.
                while (m_StopRequested == false)
                {
                    Thread.Sleep(10000); //put this into the
configuration file once complete
                }

                try
                {
                    Informer.LogInformation("Morcom monitor thread
stopping");
                    initiator.stop();
                }
                catch (Exception e)
                {
                    //catch any exception caused on closedown so no
restart applied
                    string errorMessage = string.Concat("Morcom Monitor
caught exception on closedown", Environment.NewLine,
                                                e.GetType().FullName,
Environment.NewLine,
                                                e.Message,
Environment.NewLine,
                                                e.StackTrace);
                    Informer.LogError(errorMessage);
                }
            }
            catch (Exception e)
            {
                if (initiator != null)
                {
                    initiator.stop();
                }
                application = null;
                settings = null;
                initiator = null;
                GC.Collect();

                //log error
                string errorMessage = string.Concat("Morcom Monitor
caught exception", Environment.NewLine,
                                                e.GetType().FullName,
Environment.NewLine,
                                                e.Message,
Environment.NewLine,
                                                e.StackTrace);
                Informer.LogError(errorMessage);

                //sleep for one minute and restart - also put into
configuration file once complete
                Thread.Sleep(60000);
                StartMorcomMonitor();
            }
        }


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