COMET (or Reverse AJAX) based Grid Control for ASP.NET Web Applications - Scalable, High Performance and Low Latency Grid Control

// Copyright (c) 2000, 2002 - 2012 Bharath K A
//
// CREATED: Sunday March 29 11:08:13 CST 2009 by Bharath K A
//
// LAST CHANGED:
//
// AUTHOR: Bharath K A
//
// Copyright 2005 by Bharath K A
// All rights reserved.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;

namespace BK.Util
{
    enum ClientStatus
    {
        Updated,
        NotUpdated
    };

    internal class ResponseDetails
    {
        private GridControlCometAjax gridCtrlCometAjaxInstance;
        private string xmlFeed;
        private bool updateRequired;
        private Queue<GridAsynchResult> queueOfClientsAndStatus;
        private object lockObj;

        internal ResponseDetails(GridControlCometAjax GridInstance)
        {
            gridCtrlCometAjaxInstance = GridInstance;
            queueOfClientsAndStatus = new Queue<GridAsynchResult>();
            lockObj = new object();
        }

        internal GridControlCometAjax GridCtrlAjaxInstance
        {
            get
            {
                return gridCtrlCometAjaxInstance;
            }
        }

        internal string XmlFeed
        {
            set
            {
                lock (lockObj)
                {
                    
                    xmlFeed = value;
                }
            }

            get
            {
                lock (lockObj)
                {
                    return xmlFeed;
                }
            }
        }

        internal bool UpdateRequired
        {
            set
            {
                lock (lockObj)
                {
                    updateRequired = value;
                    MarkUpdateRequired();
                }
            }

            get
            {
                lock (lockObj)
                {
                    return updateRequired;
                }
            }
        }

        internal void MarkUpdateRequired()
        {
            lock (lockObj)
            {
                if (updateRequired == true)
                {
                    Queue<GridAsynchResult>.Enumerator enumQueue = queueOfClientsAndStatus.GetEnumerator();

                    while (enumQueue.MoveNext())
                    {
                        enumQueue.Current.Status = ClientStatus.NotUpdated;
                    }
                }
            }
        }

        internal GridAsynchResult RemoveClient()
        {
            GridAsynchResult retVal = null;

            lock (lockObj)
            {
                if (queueOfClientsAndStatus.Count != 0)
                {
                    retVal = queueOfClientsAndStatus.Dequeue();
                }
            }

            return retVal;

        }
  
        internal void AddClient(GridAsynchResult asyncResult)
        {
            lock (lockObj)
            {
                queueOfClientsAndStatus.Enqueue(asyncResult);
            }
        }



    }
}