/// <summary>Private method used to generate the error log for the packages</summary>
        /// <param name="Folder_Name"></param>
        /// <param name="ErrorMessage"></param>
        /// <param name="Resource_Folder"></param>
        /// <param name="MetsType"></param>
        /// <param name="BaseErrorMessage"></param>
        private void Create_Error_Log(string Resource_Folder, string Folder_Name, string ErrorMessage, string MetsType, string BaseErrorMessage)
        {
            // Split the message into seperate lines
            string[] errors = ErrorMessage.Split(new char[] { '\n' });

            long errorLogId = OnError(BaseErrorMessage, Folder_Name.Replace("_", ":"), MetsType, -1);

            try
            {
                LogFileXhtml errorLog = new LogFileXhtml(Resource_Folder + "\\" + Folder_Name + ".log.html", "Package Processing Log", "SobekCM Builder Errors");
                errorLog.New();
                errorLog.AddComplete("Error Log for " + Folder_Name + " processed at: " + DateTime.Now.ToString());
                errorLog.AddComplete("");

                foreach (string thisError in errors)
                {
                    errorLog.AddError(thisError);
                    OnError(thisError, Folder_Name.Replace("_", ":"), MetsType, errorLogId);
                }
                errorLog.Close();
            }
            catch
            {
            }
        }
        /// <summary> Constructor for a new instance of the Worker_BulkLoader class </summary>
        /// <param name="Logger"> Log file object for logging progress </param>
        /// <param name="Verbose"> Flag indicates if the builder is in verbose mode, where it should log alot more information </param>
        /// <param name="InstanceInfo"> Information for the instance of SobekCM to be processed by this bulk loader </param>
        /// <param name="LogFileDirectory"> Directory where any log files would be written </param>
        /// <param name="PluginRootDirectory"> Root directory where all the plug-ins are stored locally for the builder </param>
        public Worker_BulkLoader(LogFileXhtml Logger, Single_Instance_Configuration InstanceInfo, bool Verbose, string LogFileDirectory, string PluginRootDirectory)
        {
            // Save the log file and verbose flag
            logger  = Logger;
            verbose = Verbose;
            multiInstanceBuilder = (MultiInstance_Builder_Settings.Instances.Count > 1);
            logFileDirectory     = LogFileDirectory;
            pluginRootDirectory  = PluginRootDirectory;
            instanceInfo         = InstanceInfo;

            // If this is processing multiple instances, limit the numbe of packages that should be processed
            // before allowing the builder to move to the next instance and poll
            if (multiInstanceBuilder)
            {
                newItemLimit = 100;
            }
            else
            {
                newItemLimit = -1;
            }

            Add_NonError_To_Log("Worker_BulkLoader.Constructor: Start", verbose, String.Empty, String.Empty, -1);

            // Create new list of collections to build
            aggregationsToRefresh = new List <string>();
            processedItems        = new List <BibVidStruct>();
            deletedItems          = new List <BibVidStruct>();

            // Set some defaults
            aborted           = false;
            refreshed         = false;
            noFoldersReported = false;
            firstrun          = true;

            Add_NonError_To_Log("Worker_BulkLoader.Constructor: Done", verbose, String.Empty, String.Empty, -1);
        }
        /// <summary> Continuously execute the processes in a recurring background thread </summary>
        public void Execute_In_Background()
        {
            // Set the variable which will control background execution
            int time_between_polls = Engine_ApplicationCache_Gateway.Settings.Builder.Override_Seconds_Between_Polls.HasValue ? Engine_ApplicationCache_Gateway.Settings.Builder.Override_Seconds_Between_Polls.Value : 60;

            if ((time_between_polls < 0) || (MultiInstance_Builder_Settings.Instances.Count == 1))
            {
                time_between_polls = Convert.ToInt32(Engine_ApplicationCache_Gateway.Settings.Builder.Seconds_Between_Polls);
            }

            // Determine the new log name
            string log_name       = "incoming_" + controllerStarted.Year + "_" + controllerStarted.Month.ToString().PadLeft(2, '0') + "_" + controllerStarted.Day.ToString().PadLeft(2, '0') + ".html";
            string local_log_name = Path.Combine(logFileDirectory, log_name);

            // Create the new log file
            LogFileXhtml preloader_logger = new LogFileXhtml(local_log_name, "SobekCM Incoming Packages Log", "UFDC_Builder.exe", true);

            // start with warnings on imagemagick and ghostscript not being installed
            if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.ImageMagick_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.ImageMagick_Executable)))
            {
                Console.WriteLine("WARNING: Could not find ImageMagick installed.  Some image processing will be unavailable.");
                preloader_logger.AddNonError("WARNING: Could not find ImageMagick installed.  Some image processing will be unavailable.");
            }

            if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.Ghostscript_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.Ghostscript_Executable)))
            {
                Console.WriteLine("WARNING: Could not find GhostScript installed.  Some PDF processing will be unavailable.");
                preloader_logger.AddNonError("WARNING: Could not find GhostScript installed.  Some PDF processing will be unavailable.");
            }

            // Set the time for the next feed building event to 10 minutes from now
            feedNextBuildTime = DateTime.Now.Add(new TimeSpan(0, 10, 0));

            // First, step through each active configuration and see if building is currently aborted
            // while doing very minimal processes
            aborted = false;
            Console.WriteLine("Checking for initial abort condition");
            preloader_logger.AddNonError("Checking for initial abort condition");
            string abort_message   = String.Empty;
            int    build_instances = 0;

            foreach (Single_Instance_Configuration dbConfig in instances)
            {
                if (!dbConfig.Is_Active)
                {
                    Console.WriteLine(dbConfig.Name + " is set to INACTIVE");
                    preloader_logger.AddNonError(dbConfig.Name + " is set to INACTIVE");
                }
                else
                {
                    SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                    Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;

                    // Check that this should not be skipped or aborted
                    Builder_Operation_Flag_Enum operationFlag = Abort_Database_Mechanism.Builder_Operation_Flag;
                    switch (operationFlag)
                    {
                    case Builder_Operation_Flag_Enum.ABORT_REQUESTED:
                    case Builder_Operation_Flag_Enum.ABORTING:
                        // Since this was an abort request at the very beginning, switch back to standard
                        Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.STANDARD_OPERATION;
                        build_instances++;
                        break;

                    case Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED:
                        abort_message = "PREVIOUS NO BUILDING flag found in " + dbConfig.Name;
                        Console.WriteLine(abort_message);
                        preloader_logger.AddNonError(abort_message);
                        break;

                    default:
                        build_instances++;
                        break;
                    }
                }
            }


            // If no instances to run just abort
            if (build_instances == 0)
            {
                // Add messages in each active instance
                foreach (Single_Instance_Configuration dbConfig in instances)
                {
                    if (dbConfig.Is_Active)
                    {
                        Console.WriteLine("No active databases set for building in the config file");
                        preloader_logger.AddError("No active databases set for building in config file... Aborting");
                        SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", abort_message, String.Empty);

                        // Save information about this last run
                        Engine_Database.Set_Setting("Builder Version", Engine_ApplicationCache_Gateway.Settings.Static.Current_Builder_Version);
                        Engine_Database.Set_Setting("Builder Last Run Finished", DateTime.Now.ToString());
                        Engine_Database.Set_Setting("Builder Last Message", abort_message);
                    }
                }

                // Do nothing else
                return;
            }

            // Build all the bulk loader objects
            List <Worker_BulkLoader> loaders = new List <Worker_BulkLoader>();

            foreach (Single_Instance_Configuration dbConfig in instances)
            {
                if (!dbConfig.Is_Active)
                {
                    loaders.Add(null);
                    continue;
                }

                SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;

                // At this point warn on mossing the Ghostscript and ImageMagick, to get it into each instances database logs
                if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.ImageMagick_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.ImageMagick_Executable)))
                {
                    Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "WARNING: Could not find ImageMagick installed.  Some image processing will be unavailable.", String.Empty);
                }

                if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.Ghostscript_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.Ghostscript_Executable)))
                {
                    Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "WARNING: Could not find GhostScript installed.  Some PDF processing will be unavailable.", String.Empty);
                }

                Console.WriteLine(dbConfig.Name + " - Preparing to begin polling");
                preloader_logger.AddNonError(dbConfig.Name + " - Preparing to begin polling");
                Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Preparing to begin polling", String.Empty);

                // Create the new bulk loader
                Worker_BulkLoader newLoader = new Worker_BulkLoader(preloader_logger, dbConfig, verbose, logFileDirectory, pluginRootDirectory);

                // Try to refresh to test database and engine connectivity
                if (newLoader.Refresh_Settings_And_Item_List())
                {
                    loaders.Add(newLoader);
                }
                else
                {
                    Console.WriteLine(dbConfig.Name + " - Error pulling setting of configuration information");
                    preloader_logger.AddError(dbConfig.Name + " - Error pulling setting of configuration information");
                }
            }

            // If no loaders past the tests above, done
            if (loaders.Count == 0)
            {
                Console.WriteLine("Aborting since no valid instances found to process");
                preloader_logger.AddError("Aborting since no valid instances found to process");
                return;
            }

            // Set the maximum number of packages to process before moving to the next instance
            if (loaders.Count > 1)
            {
                MultiInstance_Builder_Settings.Instance_Package_Limit = 100;
            }

            bool firstRun = true;


            // Loop continually until the end hour is achieved
            Builder_Operation_Flag_Enum abort_flag = Builder_Operation_Flag_Enum.STANDARD_OPERATION;

            do
            {
                // Is it time to build any RSS/XML feeds?
                if (DateTime.Compare(DateTime.Now, feedNextBuildTime) >= 0)
                {
                    feedNextBuildTime = DateTime.Now.Add(new TimeSpan(0, 10, 0));
                }

                bool skip_sleep = false;

                // Step through each instance
                for (int i = 0; i < loaders.Count; i++)
                {
                    if (loaders[i] != null)
                    {
                        // Get the instance
                        Single_Instance_Configuration dbInstance = instances[i];

                        // Set the database connection strings
                        Engine_Database.Connection_String       = dbInstance.DatabaseConnection.Connection_String;
                        SobekCM_Item_Database.Connection_String = dbInstance.DatabaseConnection.Connection_String;

                        // Look for abort
                        if (CheckForAbort())
                        {
                            aborted = true;
                            if (Abort_Database_Mechanism.Builder_Operation_Flag != Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED)
                            {
                                abort_flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                                Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.ABORTING;
                            }
                            break;
                        }

                        // Refresh all settings, etc..
                        loaders[i].Refresh_Settings_And_Item_List();

                        // Pull the abort/pause flag
                        Builder_Operation_Flag_Enum currentPauseFlag = Abort_Database_Mechanism.Builder_Operation_Flag;

                        // If not paused, run the prebuilder
                        if (currentPauseFlag != Builder_Operation_Flag_Enum.PAUSE_REQUESTED)
                        {
                            skip_sleep = skip_sleep || Run_BulkLoader(loaders[i], verbose);

                            // Look for abort
                            if ((!aborted) && (CheckForAbort()))
                            {
                                aborted = true;
                                if (Abort_Database_Mechanism.Builder_Operation_Flag != Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED)
                                {
                                    abort_flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                                    Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.ABORTING;
                                }
                                break;
                            }
                        }
                        else
                        {
                            preloader_logger.AddNonError(dbInstance.Name + " - Building paused");
                            Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Building temporarily PAUSED", String.Empty);
                        }
                    }
                }

                if (aborted)
                {
                    break;
                }


                // Publish the log
                publish_log_file(local_log_name);

                // Sleep for correct number of milliseconds
                if (!skip_sleep)
                {
                    Thread.Sleep(1000 * time_between_polls);
                }
            } while (DateTime.Now.Hour < BULK_LOADER_END_HOUR);

            // Do the final work for all of the different dbInstances
            if (!aborted)
            {
                for (int i = 0; i < instances.Count; i++)
                {
                    if (loaders[i] != null)
                    {
                        // Get the instance
                        Single_Instance_Configuration dbInstance = instances[i];

                        // Set the database flag
                        SobekCM_Item_Database.Connection_String = dbInstance.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbInstance.DatabaseConnection.Connection_String;

                        // Pull the abort/pause flag
                        Builder_Operation_Flag_Enum currentPauseFlag2 = Abort_Database_Mechanism.Builder_Operation_Flag;

                        // If not paused, run the prebuilder
                        if (currentPauseFlag2 != Builder_Operation_Flag_Enum.PAUSE_REQUESTED)
                        {
                            // Initiate the recreation of the links between metadata and collections
                            Engine_Database.Admin_Update_Cached_Aggregation_Metadata_Links();
                        }

                        // Clear the memory
                        loaders[i].ReleaseResources();
                    }
                }
            }
            else
            {
                // Mark the aborted in each instance
                foreach (Single_Instance_Configuration dbConfig in instances)
                {
                    if (dbConfig.Is_Active)
                    {
                        Console.WriteLine("Setting abort flag message in " + dbConfig.Name);
                        preloader_logger.AddNonError("Setting abort flag message in " + dbConfig.Name);
                        SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Building ABORTED per request from database key", String.Empty);

                        // Save information about this last run
                        Engine_Database.Set_Setting("Builder Version", Engine_ApplicationCache_Gateway.Settings.Static.Current_Builder_Version);
                        Engine_Database.Set_Setting("Builder Last Run Finished", DateTime.Now.ToString());
                        Engine_Database.Set_Setting("Builder Last Message", "Building ABORTED per request");

                        // Finally, set the builder flag appropriately
                        if (abort_flag == Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED)
                        {
                            Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                        }
                    }
                }
            }


            // Publish the log
            publish_log_file(local_log_name);


            //// Initiate a solr/lucene index optimization since we are done loading for a while
            //if (DateTime.Now.Day % 2 == 0)
            //{
            //	if (Engine_ApplicationCache_Gateway.Settings.Document_Solr_Index_URL.Length > 0)
            //	{
            //		Console.WriteLine("Initiating Solr/Lucene document index optimization");
            //		Solr_Controller.Optimize_Document_Index(Engine_ApplicationCache_Gateway.Settings.Document_Solr_Index_URL);
            //	}
            //}
            //else
            //{
            //	if (Engine_ApplicationCache_Gateway.Settings.Page_Solr_Index_URL.Length > 0)
            //	{
            //		Console.WriteLine("Initiating Solr/Lucene page index optimization");
            //		Solr_Controller.Optimize_Page_Index(Engine_ApplicationCache_Gateway.Settings.Page_Solr_Index_URL);
            //	}
            //}
            //// Sleep for twenty minutes to end this (the index rebuild might take some time)
            //Thread.Sleep(1000 * 20 * 60);
        }
        private bool Configure_Builders_To_Run(LogFileXhtml PreloaderLogger)
        {
            // Verify connectivity and rights on the logs subfolder
            if (!Directory.Exists(logFileDirectory))
            {
                try
                {
                    Directory.CreateDirectory(logFileDirectory);
                }
                catch
                {
                    Console.WriteLine("Error creating necessary logs subfolder under the application folder.\n");
                    Console.WriteLine("Please create manually.\n");
                    Console.WriteLine(logFileDirectory);
                    return(false);
                }
            }
            try
            {
                StreamWriter testWriter = new StreamWriter(Path.Combine(logFileDirectory, "test.log"), false);
                testWriter.WriteLine("TEST");
                testWriter.Flush();
                testWriter.Close();

                File.Delete(Path.Combine(logFileDirectory, "test.log"));
            }
            catch
            {
                Console.WriteLine("The service account needs modify rights on the logs subfolder.\n");
                Console.WriteLine("Please correct manually.\n");
                Console.WriteLine(logFileDirectory);
                return(false);
            }

            // Verify connectivity and rights on the plugins subfolder
            if (!Directory.Exists(pluginRootDirectory))
            {
                try
                {
                    Directory.CreateDirectory(pluginRootDirectory);
                }
                catch
                {
                    Console.WriteLine("Error creating necessary plugins subfolder under the application folder.\n");
                    Console.WriteLine("Please create manually.\n");
                    Console.WriteLine(pluginRootDirectory);
                    return(false);
                }
            }
            try
            {
                StreamWriter testWriter = new StreamWriter(Path.Combine(pluginRootDirectory, "test.log"), false);
                testWriter.WriteLine("TEST");
                testWriter.Flush();
                testWriter.Close();

                File.Delete(Path.Combine(pluginRootDirectory, "test.log"));
            }
            catch
            {
                Console.WriteLine("The service account needs modify rights on the plugins subfolder.\n");
                Console.WriteLine("Please correct manually.\n");
                Console.WriteLine(pluginRootDirectory);
                return(false);
            }

            // Now, veryify the configuration file exists
            configurationFile = Path.Combine(MultiInstance_Builder_Settings.Builder_Executable_Directory, "config", "sobekcm.config");
            if (!File.Exists(configurationFile))
            {
                write_error("The configuration file is missing!!", PreloaderLogger);
                write_error("Execution aborted due to missing configuration file.", PreloaderLogger);
                return(false);
            }

            // Should be a config file now, so read it
            if (!MultiInstance_Builder_Settings_Reader.Read_Config(configurationFile))
            {
                write_error("Error encountered reading the configuration file!!", PreloaderLogger);
                write_error("Execution aborted due to incorrect configuration file.", PreloaderLogger);
                return(false);
            }

            // Since the configuration was read, save the time
            configReadTime = DateTime.Now;

            // If no instances exist, then the builder has nothing to do
            if ((MultiInstance_Builder_Settings.Instances.Count == 0) || (String.IsNullOrEmpty(MultiInstance_Builder_Settings.Instances[0].DatabaseConnection.Connection_String)))
            {
                write_error("No instances listed in the congfiguration file", PreloaderLogger);
                write_error("Execution aborted due to configuration file not including any instances to process", PreloaderLogger);
                return(false);
            }

            // This is a bit of shortcut in the case there is only one instance
            if (MultiInstance_Builder_Settings.Instances.Count == 1)
            {
                // If no database connection on the single instance, return
                if (String.IsNullOrEmpty(MultiInstance_Builder_Settings.Instances[0].DatabaseConnection.Connection_String))
                {
                    write_error("Single instance configuration is missing the database connection string", PreloaderLogger);
                    write_error("Execution aborted", PreloaderLogger);
                    return(false);
                }

                Engine_Database.Connection_String = MultiInstance_Builder_Settings.Instances[0].DatabaseConnection.Connection_String;
                if (!Engine_Database.Test_Connection())
                {
                    write_error("Unable to connect to the database using provided connection string:", PreloaderLogger);
                    write_error(Engine_Database.Connection_String, PreloaderLogger);
                    write_error("Execution aborted", PreloaderLogger);
                    return(false);
                }
            }

            // Look for the valid Image magick file information in the registry and configuration
            if ((String.IsNullOrEmpty(Engine_ApplicationCache_Gateway.Settings.Builder.ImageMagick_Executable)) || (!File.Exists(Engine_ApplicationCache_Gateway.Settings.Builder.ImageMagick_Executable)))
            {
                string possible_imagemagick = Look_For_Variable_Registry_Key("SOFTWARE\\ImageMagick", "BinPath");
                if ((!String.IsNullOrEmpty(possible_imagemagick)) && (Directory.Exists(possible_imagemagick)) && (File.Exists(Path.Combine(possible_imagemagick, "convert.exe"))))
                {
                    MultiInstance_Builder_Settings.ImageMagick_Executable = Path.Combine(possible_imagemagick, "convert.exe");
                }
            }
            else
            {
                MultiInstance_Builder_Settings.ImageMagick_Executable = Engine_ApplicationCache_Gateway.Settings.Builder.ImageMagick_Executable;
            }

            // If no ImageMagick file found, add a warning
            if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.ImageMagick_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.ImageMagick_Executable)))
            {
                write_nonerror("WARNING: Could not find ImageMagick installed.  Some image processing will be unavailable.", PreloaderLogger);
            }

            // Look for a valid ghostscript file information in the registry and configuration
            if ((String.IsNullOrEmpty(Engine_ApplicationCache_Gateway.Settings.Builder.Ghostscript_Executable)) || (!File.Exists(Engine_ApplicationCache_Gateway.Settings.Builder.Ghostscript_Executable)))
            {
                string possible_ghost = Look_For_Variable_Registry_Key("SOFTWARE\\GPL Ghostscript", "GS_DLL");
                if (!String.IsNullOrEmpty(possible_ghost))
                {
                    string gsPath = Path.GetDirectoryName(possible_ghost);
                    if ((!String.IsNullOrEmpty(gsPath)) && (Directory.Exists(gsPath)) && ((File.Exists(Path.Combine(gsPath, "gswin32c.exe"))) || (File.Exists(Path.Combine(gsPath, "gswin64c.exe")))))
                    {
                        if (File.Exists(Path.Combine(gsPath, "gswin64c.exe")))
                        {
                            MultiInstance_Builder_Settings.Ghostscript_Executable = Path.Combine(gsPath, "gswin64c.exe");
                        }
                        else
                        {
                            MultiInstance_Builder_Settings.Ghostscript_Executable = Path.Combine(gsPath, "gswin32c.exe");
                        }
                    }
                }
            }
            else
            {
                MultiInstance_Builder_Settings.Ghostscript_Executable = Engine_ApplicationCache_Gateway.Settings.Builder.Ghostscript_Executable;
            }

            // If no Ghostscript file found, add a warning
            if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.Ghostscript_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.Ghostscript_Executable)))
            {
                write_nonerror("WARNING: Could not find GhostScript installed.  Some PDF processing will be unavailable.", PreloaderLogger);
            }

            // Save the list of instances
            instances.Clear();
            foreach (Single_Instance_Configuration dbInfo in MultiInstance_Builder_Settings.Instances)
            {
                instances.Add(dbInfo);
            }

            // First, step through each active configuration and see if building is currently aborted
            // while doing very minimal processes
            aborted = false;
            write_nonerror("Checking for initial abort condition", PreloaderLogger);
            string abort_message   = String.Empty;
            int    build_instances = 0;

            foreach (Single_Instance_Configuration dbConfig in instances)
            {
                if (!dbConfig.Is_Active)
                {
                    write_nonerror(dbConfig.Name + " is set to INACTIVE", PreloaderLogger);
                }
                else
                {
                    SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                    Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;

                    // Check that this should not be skipped or aborted
                    Builder_Operation_Flag_Enum operationFlag = Abort_Database_Mechanism.Builder_Operation_Flag;
                    switch (operationFlag)
                    {
                    case Builder_Operation_Flag_Enum.ABORT_REQUESTED:
                    case Builder_Operation_Flag_Enum.ABORTING:
                        // Since this was an abort request at the very beginning, switch back to standard
                        Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.STANDARD_OPERATION;
                        build_instances++;
                        break;

                    case Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED:
                        abort_message = "PREVIOUS NO BUILDING flag found in " + dbConfig.Name;
                        write_nonerror(abort_message, PreloaderLogger);
                        break;

                    default:
                        build_instances++;
                        break;
                    }
                }
            }


            // If no instances to run just abort
            if (build_instances == 0)
            {
                // Add messages in each active instance
                foreach (Single_Instance_Configuration dbConfig in instances)
                {
                    if (dbConfig.Is_Active)
                    {
                        write_error("No active databases set for building in config file... Aborting", PreloaderLogger);
                        SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", abort_message, String.Empty);

                        // Save information about this last run
                        Engine_Database.Set_Setting("Builder Version", Engine_ApplicationCache_Gateway.Settings.Static.Current_Builder_Version);
                        Engine_Database.Set_Setting("Builder Last Run Finished", DateTime.Now.ToString());
                        Engine_Database.Set_Setting("Builder Last Message", abort_message);
                    }
                }

                // Do nothing else
                return(false);
            }

            // Build all the bulk loader objects
            loaders.Clear();
            foreach (Single_Instance_Configuration dbConfig in instances)
            {
                if (!dbConfig.Is_Active)
                {
                    loaders.Add(null);
                    continue;
                }

                SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;

                // At this point warn on mossing the Ghostscript and ImageMagick, to get it into each instances database logs
                if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.ImageMagick_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.ImageMagick_Executable)))
                {
                    Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "WARNING: Could not find ImageMagick installed.  Some image processing will be unavailable.", String.Empty);
                }

                if ((String.IsNullOrEmpty(MultiInstance_Builder_Settings.Ghostscript_Executable)) || (!File.Exists(MultiInstance_Builder_Settings.Ghostscript_Executable)))
                {
                    Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "WARNING: Could not find GhostScript installed.  Some PDF processing will be unavailable.", String.Empty);
                }

                write_nonerror(dbConfig.Name + " - Preparing to begin polling", PreloaderLogger);
                Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Preparing to begin polling", String.Empty);

                // Create the new bulk loader
                Worker_BulkLoader newLoader = new Worker_BulkLoader(PreloaderLogger, dbConfig, verbose, logFileDirectory, pluginRootDirectory);

                // Try to refresh to test database and engine connectivity
                if (newLoader.Refresh_Settings_And_Item_List())
                {
                    loaders.Add(newLoader);
                }
                else
                {
                    write_error(dbConfig.Name + " - Error pulling setting of configuration information", PreloaderLogger);
                }
            }

            // If no loaders past the tests above, done
            if (loaders.Count == 0)
            {
                write_error("Aborting since no valid instances found to process", PreloaderLogger);
                return(false);
            }

            // Set the maximum number of packages to process before moving to the next instance
            if (loaders.Count > 1)
            {
                MultiInstance_Builder_Settings.Instance_Package_Limit = 100;
            }

            return(true);
        }
 private void write_nonerror(string Message, LogFileXhtml PreloaderLogger)
 {
     Console.WriteLine(Message + "\n");
     PreloaderLogger.AddNonError(Message);
 }
        /// <summary> Continuously execute the processes in a recurring background thread </summary>
        public void Execute_In_Background()
        {
            // Determine the new log name
            string log_name       = "incoming_" + controllerStarted.Year + "_" + controllerStarted.Month.ToString().PadLeft(2, '0') + "_" + controllerStarted.Day.ToString().PadLeft(2, '0') + ".html";
            string local_log_name = Path.Combine(logFileDirectory, log_name);

            // Create the new log file
            LogFileXhtml preloader_logger = null;

            try
            {
                preloader_logger = new LogFileXhtml(local_log_name, "SobekCM Incoming Packages Log", "UFDC_Builder.exe", true);
            }
            catch (Exception ee)
            {
                Console.WriteLine("Error creating logfile: " + ee.Message);
            }

            // Configure builders to run and run some basic tests
            if ((!Configure_Builders_To_Run(preloader_logger)) || (preloader_logger == null))
            {
                return;
            }

            // Set the variable which will control background execution
            int time_between_polls = Engine_ApplicationCache_Gateway.Settings.Builder.Override_Seconds_Between_Polls.HasValue ? Engine_ApplicationCache_Gateway.Settings.Builder.Override_Seconds_Between_Polls.Value : 60;

            if ((time_between_polls < 0) || (MultiInstance_Builder_Settings.Instances.Count == 1))
            {
                time_between_polls = Convert.ToInt32(Engine_ApplicationCache_Gateway.Settings.Builder.Seconds_Between_Polls);
            }

            // Loop continually until the end hour is achieved
            Builder_Operation_Flag_Enum abort_flag = Builder_Operation_Flag_Enum.STANDARD_OPERATION;

            do
            {
                // Check the current last write time on the config file versus the last read
                if (File.Exists(configurationFile))
                {
                    DateTime lastWriteTime = (new FileInfo(configurationFile)).LastWriteTime;
                    if (lastWriteTime > configReadTime)
                    {
                        write_nonerror("Configuration file change detected ... reloading", preloader_logger);
                        Configure_Builders_To_Run(preloader_logger);
                    }
                }

                bool skip_sleep = false;

                // Step through each instance
                for (int i = 0; i < loaders.Count; i++)
                {
                    if (loaders[i] != null)
                    {
                        // Get the instance
                        Single_Instance_Configuration dbInstance = instances[i];

                        // Set the database connection strings
                        Engine_Database.Connection_String       = dbInstance.DatabaseConnection.Connection_String;
                        SobekCM_Item_Database.Connection_String = dbInstance.DatabaseConnection.Connection_String;

                        // Look for abort
                        if (CheckForAbort())
                        {
                            aborted = true;
                            if (Abort_Database_Mechanism.Builder_Operation_Flag != Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED)
                            {
                                abort_flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                                Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.ABORTING;
                            }
                            break;
                        }

                        // Refresh all settings, etc..
                        loaders[i].Refresh_Settings_And_Item_List();

                        // Pull the abort/pause flag
                        Builder_Operation_Flag_Enum currentPauseFlag = Abort_Database_Mechanism.Builder_Operation_Flag;

                        // If not paused, run the prebuilder
                        if (currentPauseFlag != Builder_Operation_Flag_Enum.PAUSE_REQUESTED)
                        {
                            skip_sleep = skip_sleep || Run_BulkLoader(loaders[i], verbose);

                            // Look for abort
                            if ((!aborted) && (CheckForAbort()))
                            {
                                aborted = true;
                                if (Abort_Database_Mechanism.Builder_Operation_Flag != Builder_Operation_Flag_Enum.NO_BUILDING_REQUESTED)
                                {
                                    abort_flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                                    Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.ABORTING;
                                }
                                break;
                            }
                        }
                        else
                        {
                            preloader_logger.AddNonError(dbInstance.Name + " - Building paused");
                            Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Building temporarily PAUSED", String.Empty);
                        }
                    }
                }

                if (aborted)
                {
                    break;
                }


                // Publish the log
                publish_log_file(local_log_name);

                // Sleep for correct number of milliseconds
                if (!skip_sleep)
                {
                    Thread.Sleep(1000 * time_between_polls);
                }
            } while (DateTime.Now.Hour < BULK_LOADER_END_HOUR);

            // Do the final work for all of the different dbInstances
            if (!aborted)
            {
                for (int i = 0; i < instances.Count; i++)
                {
                    if (loaders[i] != null)
                    {
                        // Get the instance
                        Single_Instance_Configuration dbInstance = instances[i];

                        // Set the database flag
                        SobekCM_Item_Database.Connection_String = dbInstance.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbInstance.DatabaseConnection.Connection_String;

                        // Pull the abort/pause flag
                        Builder_Operation_Flag_Enum currentPauseFlag2 = Abort_Database_Mechanism.Builder_Operation_Flag;

                        // If not paused, run the prebuilder
                        if (currentPauseFlag2 != Builder_Operation_Flag_Enum.PAUSE_REQUESTED)
                        {
                            // Initiate the recreation of the links between metadata and collections
                            Engine_Database.Admin_Update_Cached_Aggregation_Metadata_Links();
                        }

                        // Clear the memory
                        loaders[i].ReleaseResources();
                    }
                }
            }
            else
            {
                // Mark the aborted in each instance
                foreach (Single_Instance_Configuration dbConfig in instances)
                {
                    if (dbConfig.Is_Active)
                    {
                        Console.WriteLine("Setting abort flag message in " + dbConfig.Name);
                        preloader_logger.AddNonError("Setting abort flag message in " + dbConfig.Name);
                        SobekCM_Item_Database.Connection_String = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Connection_String       = dbConfig.DatabaseConnection.Connection_String;
                        Engine_Database.Builder_Add_Log_Entry(-1, String.Empty, "Standard", "Building ABORTED per request from database key", String.Empty);

                        // Save information about this last run
                        Engine_Database.Set_Setting("Builder Version", Engine_ApplicationCache_Gateway.Settings.Static.Current_Builder_Version);
                        Engine_Database.Set_Setting("Builder Last Run Finished", DateTime.Now.ToString());
                        Engine_Database.Set_Setting("Builder Last Message", "Building ABORTED per request");

                        // Finally, set the builder flag appropriately
                        if (abort_flag == Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED)
                        {
                            Abort_Database_Mechanism.Builder_Operation_Flag = Builder_Operation_Flag_Enum.LAST_EXECUTION_ABORTED;
                        }
                    }
                }
            }


            // Publish the log
            publish_log_file(local_log_name);


            //// Initiate a solr/lucene index optimization since we are done loading for a while
            //if (DateTime.Now.Day % 2 == 0)
            //{
            //	if (Engine_ApplicationCache_Gateway.Settings.Document_Solr_Index_URL.Length > 0)
            //	{
            //		Console.WriteLine("Initiating Solr/Lucene document index optimization");
            //		Solr_Controller.Optimize_Document_Index(Engine_ApplicationCache_Gateway.Settings.Document_Solr_Index_URL);
            //	}
            //}
            //else
            //{
            //	if (Engine_ApplicationCache_Gateway.Settings.Page_Solr_Index_URL.Length > 0)
            //	{
            //		Console.WriteLine("Initiating Solr/Lucene page index optimization");
            //		Solr_Controller.Optimize_Page_Index(Engine_ApplicationCache_Gateway.Settings.Page_Solr_Index_URL);
            //	}
            //}
            //// Sleep for twenty minutes to end this (the index rebuild might take some time)
            //Thread.Sleep(1000 * 20 * 60);
        }