KingNET.PageLib/Cache/DefaultCacheStrategy.cs

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

namespace KingNET.PageLib.Cache
{

    /// <summary>
    /// 
    /// </summary>
    public class DefaultCacheStrategy : ICacheStrategy
    {
        private static readonly DefaultCacheStrategy instance = new DefaultCacheStrategy();

        protected static volatile System.Web.Caching.Cache webCache = System.Web.HttpRuntime.Cache;

        /// <summary>
        /// 默认缓存存活期为3600秒(1小时)
        /// </summary>
        protected int _timeOut = 3600;

        private static object syncObj = new object();

        /// <summary>
        /// 构造函数
        /// </summary>
        static DefaultCacheStrategy()
        {
            //lock (syncObj)
            //{
            //    //System.Web.HttpContext context = System.Web.HttpContext.Current;
            //    //if(context != null)
            //    //    webCache = context.Cache;
            //    //else
            //    webCache = System.Web.HttpRuntime.Cache;
            //}	
        }


        /// <summary>
        /// 设置到期相对时间[单位: 秒] 
        /// </summary>
        public virtual int TimeOut
        {
            set { _timeOut = value > 0 ? value : 3600; }
            get { return _timeOut > 0 ? _timeOut : 3600; }
        }


        public static System.Web.Caching.Cache GetWebCacheObj
        {
            get { return webCache; }
        }

        /// <summary>
        /// 加入当前对象到缓存中
        /// </summary>
        /// <param name="objID">对象的键值</param>