cachecontroller.cs

来自「基于Asp.net、MS sql sever 2000、C# 论坛系统源码」· CS 代码 · 共 338 行

using System;
using Stella.BusinessLogic;
using Stella.Utility;
using Stella.Model;
using System.Web;
using System.Collections;

namespace Stella.Web.ProcessFlow
{
	/// <summary>
	/// 缓存控制器
	/// </summary>
	public class CacheController
	{
		#region GetCachedForum

		/// <summary>
		/// 获取缓存的论坛
		/// </summary>
		/// <returns>完整的论坛</returns>
		public Forum GetCachedForum()
		{
			if(HttpContext.Current.Cache[CType.Forum]==null)
			{
				Forum forum=new Forum();

				ForumLogic	forumlogic=new ForumLogic();			
				DistrictLogic districtlogic=new DistrictLogic();

				if(forum.Districts!=null)
					forum.Districts.Clear();

				forumlogic.FillWithDistricts(forum);

				if(forum.Districts==null)
					HttpContext.Current.Cache.Insert(CType.Forum,forum,null,System.DateTime.Now.AddHours(24),TimeSpan.Zero);
				else
				{
					foreach(District district in forum.Districts)
					{
						districtlogic.FillWithThemes(district);
					}

					forum.Config=GetCachedForumConfig();

					HttpContext.Current.Cache.Insert(CType.Forum,forum,null,DateTime.MaxValue,TimeSpan.FromHours(3));
					
				}
				
			}

			return (Forum)HttpContext.Current.Cache[CType.Forum];
		}

        #endregion

		#region GetCachedThemes

		/// <summary>
		/// 得到缓存的版块列表
		/// </summary>
		/// <returns>版块列表</returns>
		public ArrayList GetCachedThemes()
		{
			if(HttpContext.Current.Cache[CType.Themes]==null)
			{
				Forum forum=GetCachedForum();
				ArrayList list=new ArrayList();

				

				foreach(District dist in forum.Districts)
				{
					foreach(Theme theme in dist.Themes)
					{
						list.Add(theme);
					}
					
				}
				HttpContext.Current.Cache.Insert(CType.Themes,list,null,DateTime.MaxValue,TimeSpan.FromHours(3));

				
			}
			return (ArrayList)HttpContext.Current.Cache[CType.Themes];
		}

		#endregion

		#region GetCachedTopics

		/// <summary>
		/// 得到缓存的相应版块第一页的主题列表
		/// </summary>
		/// <param name="themeId">版块编号</param>
		/// <returns>主题列表</returns>
		public Theme GetCachedTopics(int themeId)
		{
			if(HttpContext.Current.Cache[CType.Topics(themeId)]==null)
			{
				ThemeLogic tl=new ThemeLogic();
				Theme thm=new Theme();

				if(thm.Topics!=null)
					thm.Topics.Clear();

				thm.Tid=themeId;
				tl.FillWithTopics(thm,ConfigHelper.ThemeSize,1);
				HttpContext.Current.Cache.Insert(CType.Topics(themeId),thm,null,System.DateTime.Now.AddMinutes(10),TimeSpan.Zero);
				
			}

			return (Theme)HttpContext.Current.Cache[CType.Topics(themeId)];
			
		}

		#endregion

		#region GetCachedNewTopics

		/// <summary>
		/// 得到缓存的每一版块的最新主题的列表
		/// </summary>
		/// <param name="themeId">版块编号</param>
		/// <returns>主题列表</returns>
		public Hashtable GetCachedNewTopics()
		{
			if(HttpContext.Current.Cache[CType.NewTopics]==null)
			{
				Hashtable topics=new Hashtable();
				Theme theme;
				ArrayList ths=GetCachedThemes();
				foreach(Theme th in ths)
				{
					theme=GetCachedTopics(th.Tid);
					if(theme.Topics!=null)
						topics.Add(th.Tid,theme.Topics[0]);
					else
					{
						Stella.Model.Topic t=new Topic();
						t.Caption="尚没有任何主题";
						t.AddedDate=DateTime.Now;
						t.AddedMember="none";
						topics.Add(th.Tid,t);
					}
				}

				HttpContext.Current.Cache.Insert(CType.NewTopics,topics,null,System.DateTime.Now.AddMinutes(10),TimeSpan.Zero);

			}

			return (Hashtable)HttpContext.Current.Cache[CType.NewTopics];
			
		}

		#endregion

		#region GetCachedThemeName

		/// <summary>
		/// 得到缓存的各版块名称
		/// </summary>
		/// <param name="themeId">版块编号</param>
		public Hashtable GetCachedThemeName()
		{
			if(HttpContext.Current.Cache[CType.ThemeName]==null)
			{
				Hashtable names=new Hashtable();
				ArrayList ts=new ArrayList();
				ts=GetCachedThemes();
				foreach(Theme th in ts)
				{
					names.Add(th.Tid,th.Tname);
				}

				HttpContext.Current.Cache.Insert(CType.ThemeName,names,null,DateTime.MaxValue,TimeSpan.FromHours(3));
				
			}

			return (Hashtable)HttpContext.Current.Cache[CType.ThemeName];
			
		}

		#endregion

		#region GetCachedForumConfig
		
		/// <summary>
		/// 得到缓存的论坛设定
		/// </summary>
		/// <returns>论坛设定</returns>
		public  ForumConfig GetCachedForumConfig()
		{

			if(HttpContext.Current.Cache[CType.ForumConfig]==null)
			{
				ForumLogic	forumlogic=new ForumLogic();
				ForumConfig config=forumlogic.GetConfig();
				HttpContext.Current.Cache.Insert(CType.ForumConfig,config,null,DateTime.MaxValue,TimeSpan.FromHours(3));
			}

			return (ForumConfig)HttpContext.Current.Cache[CType.ForumConfig];
		}

		#endregion

		#region GetCachedPlacardList

		/// <summary>
		/// 得到缓存的通告列表
		/// </summary>
		/// <returns>通告列表</returns>
		public PlacardList GetCachedPlacardList()
		{
			if(HttpContext.Current.Cache[CType.PlacardList]==null)
			{
				PlacardLogic placardLogic=new PlacardLogic();
				PlacardList list=new PlacardList();
				if(list.Placards!=null)
					list.Placards.Clear();

				placardLogic.FillList(list);
				HttpContext.Current.Cache.Insert(CType.PlacardList,list,null,DateTime.MaxValue,TimeSpan.FromHours(3));
			
			}

			return (PlacardList)HttpContext.Current.Cache[CType.PlacardList];
		}

		#endregion

		#region GetCachedAdminerList

		/// <summary>
		/// 得到缓存的管理员列表
		/// </summary>
		/// <returns>管理员列表</returns>
		public UserList GetCachedAdminerList()
		{
			if(HttpContext.Current.Cache[CType.AdminerList]==null)
			{
				UserLogic userLogic=new UserLogic();
				UserList list=new UserList();

				if(list.ManagerList!=null)
					list.AdminerList.Clear();

				userLogic.FillAdminerList(list);
				HttpContext.Current.Cache.Insert(CType.AdminerList,list,null,DateTime.MaxValue,TimeSpan.FromHours(3));
				
			}

			return (UserList)HttpContext.Current.Cache[CType.AdminerList];
		}

		#endregion

		#region GetCachedManagerList

		/// <summary>
		/// 得到缓存的斑竹列表
		/// </summary>
		/// <returns>斑竹列表</returns>
		public UserList GetCachedManagerList()
		{
			if(HttpContext.Current.Cache[CType.ManagerList]==null)
			{
				UserLogic userLogic=new UserLogic();
				UserList list=new UserList();

				if(list.ManagerList!=null)
					list.ManagerList.Clear();

				userLogic.FillManagerList(list);
				HttpContext.Current.Cache.Insert(CType.ManagerList,list,null,DateTime.MaxValue,TimeSpan.FromHours(1));
				
			}

			return (UserList)HttpContext.Current.Cache[CType.ManagerList];
		}

		#endregion

		#region GetCachedManagerList

		//这个和上一个都是从数据库查，不同的是，上一个时在管理模式时使用
		//这个则在平时浏览页面时使用

		/// <summary>
		/// 得到缓存的每一版块的斑竹列表
		/// </summary>
		/// <returns>斑竹列表</returns>
		public Hashtable GetCachedThemeManagerList()
		{
			if(HttpContext.Current.Cache[CType.ThemeManagerList]==null)
			{
				Hashtable ms=new Hashtable();
				ArrayList mms;

				UserLogic userLogic=new UserLogic();
				UserList list=new UserList();

				if(list.ManagerList!=null)
					list.ManagerList.Clear();

				userLogic.FillManagerList(list);

				ArrayList ths=GetCachedThemes();

				foreach(Theme th in ths)
				{
					mms=new ArrayList();

					foreach(Member mm in list.ManagerList)
					{
						//先把相同版块的斑竹放到一起
						if(th.Tid==mm.Manage)
						{
							mms.Add(mm);
						}
					}

					//然后统一加入，用版块号做索引键
					ms.Add(th.Tid,mms);
				}

				HttpContext.Current.Cache.Insert(CType.ThemeManagerList,ms,null,DateTime.MaxValue,TimeSpan.FromHours(3));
				
				
			}

			return (Hashtable)HttpContext.Current.Cache[CType.ThemeManagerList];
		}

		#endregion

	}
}