MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Mucinfo.NewWinChart/Easychart.Finance/Easychart.Finance.DataProvider/CacheDataManagerBase.cs

namespace Easychart.Finance.DataProvider
{
    using System;
    using System.IO;
    using System.Reflection;
    using System.Web;
    using System.Web.Caching;

    public class CacheDataManagerBase : DataManagerBase
    {
        public string CacheRoot;
        public TimeSpan CacheTimeSpan = TimeSpan.Zero;
        public bool EnableFileCache = true;
        public bool EnableMemoryCache = false;

        private string GetKey(string Code)
        {
            return ("Cache_" + Code + "_" + base.StartTime.ToString("yyyyMMddHHmmss") + "_" + base.EndTime.ToString("yyyyMMddHHmmss"));
        }

        public CommonDataProvider MergeRealtime(CommonDataProvider cdp, string Code)
        {
            if (cdp != null)
            {
                if (base.DownloadRealTimeQuote && (this.CacheTimeSpan.Days >= 1))
                {
                    DataPacket dp = DataPacket.DownloadFromYahoo(Code);
                    cdp.Merge(dp);
                    cdp.SetStringData("Name", dp.StockName);
                }
                this.SetStrings(cdp, Code);
            }
            return cdp;
        }

        public override IDataProvider this[string Code, int Count]
        {
            get
            {
                if (this.CacheTimeSpan == TimeSpan.Zero)
                {
                    return base[Code, Count];
                }
                if (this.EnableMemoryCache && (HttpContext.Current != null))
                {
                    object obj2 = HttpContext.Current.Cache[this.GetKey(Code)];
                    if (obj2 != null)
                    {
                        return this.MergeRealtime((CommonDataProvider) obj2, Code);
                    }
                }
                string path = "";
                if ((this.EnableFileCache && (this.CacheRoot != null)) && (this.CacheRoot != ""))
                {
                    try
                    {
                        if (this.CacheRoot.EndsWith(@"\"))
                        {
                            this.CacheRoot = this.CacheRoot.Substring(0, this.CacheRoot.Length - 1);
                        }
                        if (!Directory.Exists(this.CacheRoot))
                        {
                            Directory.CreateDirectory(this.CacheRoot);
                        }
                        this.CacheRoot = this.CacheRoot + @"\";
                        path = this.CacheRoot + this.GetKey(Code);
                        if (File.Exists(path) && (File.GetLastWriteTime(path).Add(this.CacheTimeSpan) > DateTime.Now))
                        {
                            CommonDataProvider cdp = new CommonDataProvider(this);
                            cdp.LoadBinary(path);
                            return this.MergeRealtime(cdp, Code);
                        }
                    }
                    catch
                    {
                        path = "";
                    }
                }
                IDataProvider provider2 = base[Code, Count];
                bool flag = false;
                if ((provider2 is CommonDataProvider) && (provider2.Count > 0))
                {
                    try
                    {
                        if (this.EnableFileCache && (path != ""))
                        {
                            (provider2 as CommonDataProvider).SaveBinary(path);
                            flag = true;
                        }
                    }
                    catch
                    {
                    }
                }
                if ((this.EnableMemoryCache && (HttpContext.Current != null)) && (!flag && (provider2 != null)))
                {
                    HttpContext.Current.Cache.Add(this.GetKey(Code), provider2, null, DateTime.Now.Add(this.CacheTimeSpan), TimeSpan.Zero, CacheItemPriority.Normal, null);
                }
                return this.MergeRealtime((CommonDataProvider) provider2, Code);
            }
        }
    }
}