//******************************************************************************************************//  ShortSynchronizedOperation.cs - Gbtc////  Copyright © 2014, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  03/21/2014 - Stephen C. Wills//       Generated original version of source code.////****************************************************************************************************** using System;using System.Threading; namespace GSF.Threading{    /// <summary>    /// Represents a short-running synchronized operation    /// that cannot run while it is already in progress.    /// </summary>    /// <remarks>    /// The action performed by the <see cref="ShortSynchronizedOperation"/> is executed on    /// the <see cref="ThreadPool"/> when running the operation asynchronously. When the    /// operation is set to pending, the action is executed in an asynchronous loop on the    /// thread pool until all pending operations have been completed. Since the action is    /// executed on the thread pool, it is best if it can be executed quickly, without    /// blocking the thread or putting it to sleep. If completion of the operation is    /// critical, such as when saving data to a file, this type of operation should not    /// be used since thread pool threads are background threads and will not prevent the    /// program from ending before the operation is complete.    /// </remarks>    public class ShortSynchronizedOperation : SynchronizedOperationBase    {        #region [ Constructors ]         /// <summary>        /// Creates a new instance of the <see cref="ShortSynchronizedOperation"/> class.        /// </summary>        /// <param name="action">The action to be performed during this operation.</param>        public ShortSynchronizedOperation(Action action)            : base(action)        {        }         /// <summary>        /// Creates a new instance of the <see cref="ShortSynchronizedOperation"/> class.        /// </summary>        /// <param name="action">The action to be performed during this operation.</param>        /// <param name="exceptionAction">The action to be performed if an exception is thrown from the action.</param>        public ShortSynchronizedOperation(Action action, Action<Exception> exceptionAction)            : base(action, exceptionAction)        {        }         #endregion         #region [ Methods ]         /// <summary>        /// Executes the action in an asynchronous loop on        /// the thread pool, as long as the operation is pending.        /// </summary>        protected override void ExecuteActionAsync()        {            ThreadPool.QueueUserWorkItem(state =>            {                if (ExecuteAction())                    ExecuteActionAsync();            });        }         #endregion    }}