/// <summary>
        /// ctor
        /// </summary>
        /// <param name="parameters"></param>
        /// <param name="logPath">tracking file path </param>
        /// <param name="wfHost">Workflow service host name</param>
        /// <param name="wfPersistanceDb">connection string, where WF persistance happens</param>
        public XMLFileTrackingChannel(TrackingParameters parameters, string wfHost, string logPath, string wfPersistanceDb)
        {
            _parameters      = parameters;
            _wfPersistanceDb = wfPersistanceDb;
            _workflowID      = parameters.InstanceId.ToString();
            _logLocation     = logPath;
            _wfHost          = wfHost;

            if (!Directory.Exists(_logLocation))
            {
                Directory.CreateDirectory(_logLocation);
            }

            //Start- Save Wf definition
            if (_persistanceHelper == null)
            {
                _persistanceHelper = new XMLFilePersistence(
                    Path.Combine(_logLocation, _workflowID + "_def.xml"),
                    Path.Combine(_logLocation, _workflowID + ".xml"),
                    _wfPersistanceDb
                    );

                //We will save Wf definition, if wf is new or it has been updated
                if (_persistanceHelper.IsNewOrUpdatedWfDefinition(_parameters.RootActivity))
                {
                    DateTime wfCompilationTimestamp =
                        _persistanceHelper.GetWfCompilationTimestamp(_parameters.RootActivity);

                    ActivitySummary rootActivitySummary = BuildRootActivitySummary();
                    String          activityXml         = BuildActivityXml(rootActivitySummary, wfCompilationTimestamp);
                    _persistanceHelper.PersistWfDefinitionXml(activityXml);
                }
            }
            //End- Save Wf definition
        }
 public void Complete(bool succeeded, System.Collections.ICollection items)
 {
     if (_persistanceHelper != null)
     {
         _persistanceHelper.Dispose();
         _persistanceHelper = null;
     }
 }
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        private void LogWfHostStartupInfo()
        {
            XMLFilePersistence persistanceHelper = new XMLFilePersistence(
                Path.Combine(_logLocation, GetMachineName() + ".log"));

            Process currentProcess = Process.GetCurrentProcess();

            persistanceHelper.PersistWorkflowHostLog(currentProcess.ProcessName + " PID=" + currentProcess.Id + " started @ " + currentProcess.StartTime);
        }
 public void Commit(System.Transactions.Transaction transaction, System.Collections.ICollection items)
 {
     if (_persistanceHelper == null)
     {
         //_persistanceHelper = new XmlPersistence(Path.Combine(_logLocation, _workflowID + ".xml"));
         _persistanceHelper = new XMLFilePersistence(
             Path.Combine(_logLocation, _workflowID + "_def.xml"),
             Path.Combine(_logLocation, _workflowID + ".xml"),
             _wfPersistanceDb
             );
     }
     _persistanceHelper.PersistTrackingRecords(items);
 }
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        //Retruns the workflow defition sring from XML
        public string GetDefinition()
        {
            string FileName = string.Empty;

            try
            {
                string FolderName = Path.GetDirectoryName(TrackingFilePath);
                FileName = Path.GetFileNameWithoutExtension(TrackingFilePath);
                string _wfDefFilePath = Path.Combine(FolderName, FileName + "_def.xml");

                XMLFilePersistence persistance = new XMLFilePersistence(_wfDefFilePath, TrackingFilePath, string.Empty);
                return(persistance.GetWorkflowDefinitionString());
            }
            catch
            {
                throw new Exception("Unable to load workflow definition for '" + FileName + "'");
            }
        }