//******************************************************************************************************* // ScheduleManager.cs - Gbtc // // Tennessee Valley Authority, 2009 // No copyright is claimed pursuant to 17 USC § 105. All Other Rights Reserved. // // This software is made freely available under the TVA Open Source Agreement (see below). // // Code Modification History: // ----------------------------------------------------------------------------------------------------- // 08/01/2006 - Pinal C. Patel // Original version of source code generated. // 04/23/2007 - Pinal C. Patel // Made the schedules dictionary case-insensitive. // 04/24/2007 - Pinal C. Patel // Implemented the IPersistSettings and ISupportInitialize interfaces. // 05/02/2007 - Pinal C. Patel // Converted schedules to a list instead of a dictionary. // 11/30/2007 - Pinal C. Patel // Modified the "design time" check in EndInit() method to use LicenseManager.UsageMode property // instead of DesignMode property as the former is more accurate than the latter. // Modified the Stop() method to avoid a null reference exception that was most likely causing // the IDE of the component's consumer to crash in design-mode. // 09/19/2008 - J. Ritchie Carroll // Convert to C#. // 11/04/2008 - Pinal C. Patel // Edited code comments. // 06/18/2009 - Pinal C. Patel // Fixed the implementation of Enabled property. // 09/14/2009 - Stephen C. Wills // Added new header and license agreement. // 06/21/2010 - Stephen C. Wills // Modified code to avoid calls to abort the m_startTimerThread. // 07/02/2010 - J. Ritchie Caroll // Fixed an issue related to accessing a disposed timer. // 08/04/2010 - Pinal C. Patel // Fixed an issue with NullReferenceException being encountered when ScheduleManager object is // disposed before it successfully starts up (StartTimer() method). // //******************************************************************************************************* #region [ TVA Open Source Agreement ] /* THIS OPEN SOURCE AGREEMENT ("AGREEMENT") DEFINES THE RIGHTS OF USE,REPRODUCTION, DISTRIBUTION, MODIFICATION AND REDISTRIBUTION OF CERTAIN COMPUTER SOFTWARE ORIGINALLY RELEASED BY THE TENNESSEE VALLEY AUTHORITY, A CORPORATE AGENCY AND INSTRUMENTALITY OF THE UNITED STATES GOVERNMENT ("GOVERNMENT AGENCY"). GOVERNMENT AGENCY IS AN INTENDED THIRD-PARTY BENEFICIARY OF ALL SUBSEQUENT DISTRIBUTIONS OR REDISTRIBUTIONS OF THE SUBJECT SOFTWARE. ANYONE WHO USES, REPRODUCES, DISTRIBUTES, MODIFIES OR REDISTRIBUTES THE SUBJECT SOFTWARE, AS DEFINED HEREIN, OR ANY PART THEREOF, IS, BY THAT ACTION, ACCEPTING IN FULL THE RESPONSIBILITIES AND OBLIGATIONS CONTAINED IN THIS AGREEMENT. Original Software Designation: openPDC Original Software Title: The GSF Open Source Phasor Data Concentrator User Registration Requested. Please Visit https://naspi.tva.com/Registration/ Point of Contact for Original Software: J. Ritchie Carroll 1. DEFINITIONS A. "Contributor" means Government Agency, as the developer of the Original Software, and any entity that makes a Modification. B. "Covered Patents" mean patent claims licensable by a Contributor that are necessarily infringed by the use or sale of its Modification alone or when combined with the Subject Software. C. "Display" means the showing of a copy of the Subject Software, either directly or by means of an image, or any other device. D. "Distribution" means conveyance or transfer of the Subject Software, regardless of means, to another. E. 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Point of Contact: Any Recipient contact with Government Agency is to be directed to the designated representative as follows: J. Ritchie Carroll . */ #endregion using GSF.Configuration; using System; using System.Collections.Generic; using System.ComponentModel; using System.Configuration; //using System.Drawing; using System.Text; using System.Threading; namespace GSF.Scheduling { /// /// Monitors multiple at an interval of one minute to check if they are due. /// /// /// This example shows how to use the component: /// /// using System; /// using GSF; /// using GSF.Scheduling; /// /// class Program /// { /// static void Main(string[] args) /// { /// ScheduleManager scheduler = new ScheduleManager(); /// scheduler.Initialize(); /// // Add event handlers. /// scheduler.Starting += scheduler_Starting; /// scheduler.Started += scheduler_Started; /// scheduler.ScheduleDue += scheduler_ScheduleDue; /// // Add test schedules. /// scheduler.AddSchedule("Run.Notepad", "* * * * *"); /// scheduler.AddSchedule("Run.Explorer", "* * * * *"); /// // Start the scheduler. /// scheduler.Start(); /// /// Console.ReadLine(); /// } /// /// static void scheduler_Started(object sender, EventArgs e) /// { /// Console.WriteLine("Scheduler has started successfully."); /// } /// /// static void scheduler_Starting(object sender, EventArgs e) /// { /// Console.WriteLine("Scheduler is waiting to be started."); /// } /// /// static void scheduler_ScheduleDue(object sender, EventArgsSchedule]]> e) /// { /// Console.WriteLine(string.Format("{0} schedule is due for processing.", e.Argument.Name)); /// } /// } /// /// /// //[ToolboxBitmap(typeof(ScheduleManager))] public class ScheduleManager : Component, ISupportLifecycle, ISupportInitialize, IProvideStatus, IPersistSettings { #region [ Members ] // Constants /// /// Specifies the default value for the property. /// public const bool DefaultPersistSettings = false; /// /// Specifies the default value for the property. /// public const string DefaultSettingsCategory = "ScheduleManager"; /// /// Number of milliseconds between timer ticks. /// private const int TimerInterval = 60000; // Events /// /// Occurs while the is waiting to start at the top of the minute. /// [Category("State"), Description("Occurs while the ScheduleManager is waiting to start at the top of the minute.")] public event EventHandler Starting; /// /// Occurs when the has started at the top of the minute. /// [Category("State"), Description("Occurs when the ScheduleManager has started at the top of the minute.")] public event EventHandler Started; /// /// Occurs asynchronously when a is due according to the rule specified for it. /// /// /// is the that is due. /// [Category("Schedules"), Description("Occurs asynchronously when a Schedule is due according to the rule specified for it.")] public event EventHandler> ScheduleDue; /// /// Occurs when the a particular is being checked to see if it is due. /// /// /// is the that is being checked to see if it is due. /// [Category("Schedules"), Description("Occurs when the a particular Schedule is being checked to see if it is due.")] public event EventHandler> ScheduleDueCheck; // Fields private bool m_persistSettings; private string m_settingsCategory; private List m_schedules; private System.Timers.Timer m_timer; #if ThreadTracking private ManagedThread m_startTimerThread; #else private Thread m_startTimerThread; #endif private bool m_disposed; private bool m_initialized; #endregion #region [ Constructors ] /// /// Initializes a new instance of the class. /// public ScheduleManager() : base() { m_persistSettings = DefaultPersistSettings; m_settingsCategory = DefaultSettingsCategory; m_schedules = new List(); } /// /// Initializes a new instance of the class. /// /// object that contains the . public ScheduleManager(IContainer container) : this() { if ((object)container != null) container.Add(this); } #endregion #region [ Properties ] /// /// Gets or sets a boolean value that indicates whether the settings of object are /// to be saved to the config file. /// [Category("Persistance"), DefaultValue(DefaultPersistSettings), Description("Indicates whether the settings of ScheduleManager object are to be saved to the config file.")] public bool PersistSettings { get { return m_persistSettings; } set { m_persistSettings = value; } } /// /// Gets or sets the category under which the settings of object are to be saved /// to the config file if the property is set to true. /// /// The value being assigned is null or empty string. [Category("Persistance"), DefaultValue(DefaultSettingsCategory), Description("Category under which the settings of ScheduleManager object are to be saved to the config file if the PersistSettings property is set to true.")] public string SettingsCategory { get { return m_settingsCategory; } set { if (string.IsNullOrEmpty(value)) throw new ArgumentNullException("value"); m_settingsCategory = value; } } /// /// Gets a list of all monitored by the object. /// /// /// Thread-safety Warning: Due to the asynchronous nature of , a lock must be /// obtained on before accessing it. /// [Category("Settings"), DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Description("Gets a list of all Schedule monitored by the ScheduleManager object.")] public List Schedules { get { return m_schedules; } } /// /// Gets a boolean value that indicates whether the is running. /// [Browsable(false)] public bool IsRunning { get { if ((object)m_timer != null) return m_timer.Enabled; return false; } } /// /// Gets or sets a boolean value that indicates whether the object is currently enabled. /// /// /// property is not be set by user-code directly. /// [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] public bool Enabled { get { return IsRunning; } set { if (value && !Enabled) Start(); else if (!value && Enabled) Stop(); } } /// /// Gets the unique identifier of the object. /// [Browsable(false)] public string Name { get { return m_settingsCategory; } } /// /// Gets the descriptive status of the object. /// [Browsable(false)] public string Status { get { StringBuilder status = new StringBuilder(); status.Append(" Number of schedules: "); status.Append(m_schedules.Count); status.AppendLine(); lock (m_schedules) { foreach (Schedule schedule in m_schedules) { status.AppendLine(); status.Append(schedule.Status); } } return status.ToString(); } } #endregion #region [ Methods ] /// /// Initializes the object. /// /// /// is to be called by user-code directly only if the /// object is not consumed through the designer surface of the IDE. /// public void Initialize() { if (!m_initialized) { LoadSettings(); // Load settings from the config file. m_initialized = true; // Initialize only once. } } /// /// Performs necessary operations before the object properties are initialized. /// /// /// should never be called by user-code directly. This method exists solely for use /// by the designer if the object is consumed through the designer surface of the IDE. /// [EditorBrowsable(EditorBrowsableState.Never)] public void BeginInit() { if (!DesignMode) { try { // Nothing needs to be done before component is initialized. } catch (Exception) { // Prevent the IDE from crashing when component is in design mode. } } } /// /// Performs necessary operations after the object properties are initialized. /// /// /// should never be called by user-code directly. This method exists solely for use /// by the designer if the object is consumed through the designer surface of the IDE. /// [EditorBrowsable(EditorBrowsableState.Never)] public void EndInit() { if (!DesignMode) { try { Initialize(); } catch (Exception) { // Prevent the IDE from crashing when component is in design mode. } } } /// /// Saves settings for the object to the config file if the /// property is set to true. /// /// has a value of null or empty string. public void SaveSettings() { //if (m_persistSettings) //{ //// Ensure that settings category is specified. //if (string.IsNullOrEmpty(m_settingsCategory)) // throw new ConfigurationErrorsException("SettingsCategory property has not been set"); //// Save settings under the specified category. //ConfigurationFile config = ConfigurationFile.Current; //CategorizedSettingsElementCollection settings = config.Settings[m_settingsCategory]; //settings.Clear(); //lock (m_schedules) //{ // foreach (Schedule schedule in m_schedules) // { // settings[schedule.Name, true].Update(schedule.Rule, schedule.Description); // } //} //config.Save(); //} } /// /// Loads saved settings for the object from the config file if the /// property is set to true. /// /// has a value of null or empty string. public void LoadSettings() { //if (m_persistSettings) //{ // // Ensure that settings category is specified. // if (string.IsNullOrEmpty(m_settingsCategory)) // throw new ConfigurationErrorsException("SettingsCategory property has not been set"); // // Load settings from the specified category. // ConfigurationFile config = ConfigurationFile.Current; // CategorizedSettingsElementCollection settings = config.Settings[m_settingsCategory]; // foreach (CategorizedSettingsElement setting in settings) // { // if ((object)setting != null && !setting.Name.IsNullOrWhiteSpace()) // { // // Add the schedule if it doesn't exist or update it otherwise with data from the config file. // Schedule existingSchedule = FindSchedule(setting.Name); // if ((object)existingSchedule == null) // { // // Schedule doesn't exist, so we'll add it. // lock (m_schedules) // { // m_schedules.Add(new Schedule(setting.Name, setting.Value.ToNonNullNorWhiteSpace("* * * * *"), setting.Description.ToNonNullString())); // } // } // else // { // // Schedule exists, so we'll update it. // existingSchedule.Name = setting.Name; // existingSchedule.Rule = setting.Value.ToNonNullNorWhiteSpace("* * * * *"); // existingSchedule.Description = setting.Description.ToNonNullString(); // } // } // } //} } /// /// Starts the asynchronously if not running. /// public void Start() { if (!IsRunning && (object)m_startTimerThread == null) { // Initialize if uninitialized. Initialize(); // Initialize timer that checks schedules. m_timer = new System.Timers.Timer(TimerInterval); m_timer.Elapsed += m_timer_Elapsed; // Spawn new thread to start timer at top of the minute. #if ThreadTracking m_startTimerThread = new ManagedThread(StartTimer); m_startTimerThread.Name = "TVA.Scheduling.ScheduleManager.StartTimer()"; #else m_startTimerThread = new Thread(StartTimer); m_startTimerThread.IsBackground = true; #endif m_startTimerThread.Start(); } } /// /// Stops the if running. /// public void Stop() { if ((object)m_timer != null) { m_timer.Elapsed -= m_timer_Elapsed; m_timer.Dispose(); } m_timer = null; m_startTimerThread = null; } /// /// Checks all of the to determine if they are due. /// public void CheckAllSchedules() { lock (m_schedules) { foreach (Schedule schedule in m_schedules) { OnScheduleDueCheck(new EventArgs(schedule)); // Schedule is due so raise the event. if (schedule.IsDue()) OnScheduleDue(schedule); } } } /// /// Attempts to add a new . /// /// Name of the new . /// Rule of the new . /// true if a new was added or an existing one was updated; otherwise false. public bool AddSchedule(string scheduleName, string scheduleRule) { return AddSchedule(scheduleName, scheduleRule, false); } /// /// Attempts to add a new . /// /// Name of the new . /// Rule of the new . /// true to update existing with the specified ; otherwise false. /// true if a new was added or an existing one was updated; otherwise false. public bool AddSchedule(string scheduleName, string scheduleRule, bool updateExisting) { return AddSchedule(scheduleName, scheduleRule, string.Empty, updateExisting); } /// /// Attempts to add a new . /// /// Name of the new . /// Rule of the new . /// Description of the new . /// true if a new was added; otherwise false. public bool AddSchedule(string scheduleName, string scheduleRule, string scheduleDescription) { return AddSchedule(scheduleName, scheduleRule, scheduleDescription, false); } /// /// Attempts to add a new . /// /// Name of the new . /// Rule of the new . /// Description of the new . /// true to update existing with the specified ; otherwise false. /// true if a new was added or an existing one was updated; otherwise false. public bool AddSchedule(string scheduleName, string scheduleRule, string scheduleDescription, bool updateExisting) { Schedule existingSchedule = FindSchedule(scheduleName); if ((object)existingSchedule == null) { // Schedule doesn't exist, so we'll add it. lock (m_schedules) { m_schedules.Add(new Schedule(scheduleName, scheduleRule, scheduleDescription)); } return true; } else { // Schedule exists, we'll update if specified. if (updateExisting) { // Update existing schedule. existingSchedule.Name = scheduleName; existingSchedule.Rule = scheduleRule; existingSchedule.Description = scheduleDescription; return true; } else { // Leave existing schedule alone. return false; } } } /// /// Attempts to remove a with the specified name if one exists. /// /// Name of the to be removed. /// true if the was removed; otherwise false. public bool RemoveSchedule(string scheduleName) { Schedule scheduleToRemove = FindSchedule(scheduleName); if ((object)scheduleToRemove != null) { // Schedule exists, so remove it. lock (m_schedules) { m_schedules.Remove(scheduleToRemove); } return true; } else { // Can't remove schedule, since it doesn't exist. return false; } } /// /// Searches for the with the specified name. /// /// Name of the to be obtained. /// object if a match is found; otherwise null. public Schedule FindSchedule(string scheduleName) { Schedule match = null; lock (m_schedules) { foreach (Schedule schedule in m_schedules) { if (string.Compare(schedule.Name, scheduleName, true) == 0) { match = schedule; break; } } } return match; } /// /// Raises the event. /// protected virtual void OnStarting() { if ((object)Starting != null) Starting(this, EventArgs.Empty); } /// /// Raises the event. /// protected virtual void OnStarted() { if ((object)Started != null) Started(this, EventArgs.Empty); } /// /// Raises the event. /// /// to send to event. protected virtual void OnScheduleDue(Schedule schedule) { if ((object)ScheduleDue != null) { EventArgs args = new EventArgs(schedule); foreach (EventHandler> handler in ScheduleDue.GetInvocationList()) { // Asynchrnonously invoke handlers... handler.BeginInvoke(this, args, null, null); } } } /// /// Raises the event. /// /// Event data. protected virtual void OnScheduleDueCheck(EventArgs e) { if ((object)ScheduleDueCheck != null) ScheduleDueCheck(this, e); } /// /// Releases the unmanaged resources used by the object and optionally releases the managed resources. /// /// true to release both managed and unmanaged resources; false to release only unmanaged resources. protected override void Dispose(bool disposing) { if (!m_disposed) { try { // This will be done regardless of whether the object is finalized or disposed. if (disposing) { // This will be done only when the object is disposed by calling Dispose(). Stop(); SaveSettings(); } } finally { m_disposed = true; // Prevent duplicate dispose. base.Dispose(disposing); // Call base class Dispose(). } } } private void StartTimer() { while (!IsRunning && (object)m_timer != null) { OnStarting(); if (DateTime.Now.Second == 0) { // We'll start the timer that will check the schedules at top of the minute. m_timer.Start(); OnStarted(); CheckAllSchedules(); break; } else { Thread.Sleep(1000); } } m_startTimerThread = null; } private void m_timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { CheckAllSchedules(); } #endregion } }