Enterprise Library 5.0 缓存功能

最新推荐文章于 2016-04-12 10:49:02 发布

置顶 liushengpiaoxu

最新推荐文章于 2016-04-12 10:49:02 发布

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分类专栏： Enterprise Library 文章标签： library caching object date null statistics

本文链接：https://blog.youkuaiyun.com/liushengpiaoxu/article/details/7001339

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4 篇文章

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本文实现功能：

将缓存写入数据库，并从数据库中根据键值提取缓存数据

1.准备数据库脚本：

/****** Object:  Database Caching    Script Date: 8/25/2004 3:28:27 PM ******/
IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = N'Caching')
	DROP DATABASE [Caching]
GO

CREATE DATABASE [Caching]
 COLLATE SQL_Latin1_General_CP1_CI_AS
GO

exec sp_dboption N'Caching', N'autoclose', N'false'
GO

exec sp_dboption N'Caching', N'bulkcopy', N'false'
GO

exec sp_dboption N'Caching', N'trunc. log', N'false'
GO

exec sp_dboption N'Caching', N'torn page detection', N'true'
GO

exec sp_dboption N'Caching', N'read only', N'false'
GO

exec sp_dboption N'Caching', N'dbo use', N'false'
GO

exec sp_dboption N'Caching', N'single', N'false'
GO

exec sp_dboption N'Caching', N'autoshrink', N'false'
GO

exec sp_dboption N'Caching', N'ANSI null default', N'false'
GO

exec sp_dboption N'Caching', N'recursive triggers', N'false'
GO

exec sp_dboption N'Caching', N'ANSI nulls', N'false'
GO

exec sp_dboption N'Caching', N'concat null yields null', N'false'
GO

exec sp_dboption N'Caching', N'cursor close on commit', N'false'
GO

exec sp_dboption N'Caching', N'default to local cursor', N'false'
GO

exec sp_dboption N'Caching', N'quoted identifier', N'false'
GO

exec sp_dboption N'Caching', N'ANSI warnings', N'false'
GO

exec sp_dboption N'Caching', N'auto create statistics', N'true'
GO

exec sp_dboption N'Caching', N'auto update statistics', N'true'
GO

use [Caching]
GO

/****** Object:  Stored Procedure dbo.AddItem    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[AddItem]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[AddItem]
GO

/****** Object:  Stored Procedure dbo.Flush    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Flush]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[Flush]
GO

/****** Object:  Stored Procedure dbo.GetItemCount    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetItemCount]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[GetItemCount]
GO

/****** Object:  Stored Procedure dbo.LoadItems    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[LoadItems]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[LoadItems]
GO

/****** Object:  Stored Procedure dbo.RemoveItem    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[RemoveItem]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[RemoveItem]
GO

/****** Object:  Stored Procedure dbo.UpdateLastAccessedTime    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[UpdateLastAccessedTime]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[UpdateLastAccessedTime]
GO

/****** Object:  Table [dbo].[CacheData]    Script Date: 8/25/2004 3:28:27 PM ******/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[CacheData]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[CacheData]
GO

/****** Object:  Table [dbo].[CacheData]    Script Date: 8/25/2004 3:28:27 PM ******/
if not exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[CacheData]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
 BEGIN
CREATE TABLE [dbo].[CacheData] (
	[StorageKey] [int] NOT NULL ,
	[PartitionName] [varchar] (128) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
	[Key] [varchar] (128) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
	[Value] [image] NULL ,
	[RefreshAction] [image] NULL ,
	[Expirations] [image] NULL ,
	[ScavengingPriority] [int] NOT NULL ,
	[LastAccessedTime] [datetime] NOT NULL 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
END

GO

ALTER TABLE [dbo].[CacheData] WITH NOCHECK ADD 
	CONSTRAINT [PK_CacheData] PRIMARY KEY  CLUSTERED 
	(
		[StorageKey],
		[PartitionName]
	)  ON [PRIMARY] 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.AddItem    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.AddItem
(
	@partitionName varchar(128),
	@storageKey int,
	@key varchar(128),
	@value image,
	@scavengingPriority int,
	@refreshAction image,
	@expirations image,
	@lastAccessedTime datetime
)
 AS
		delete from CacheData where StorageKey = @storageKey and PartitionName = @partitionName
		
		insert into CacheData (PartitionName, StorageKey, [Key], Value, RefreshAction, Expirations, ScavengingPriority, LastAccessedTime)
		values (@partitionName, @storageKey, @key, @value, @refreshAction, @expirations, @scavengingPriority, @lastAccessedTime)





GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.Flush    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.Flush
(
	@partitionName varchar(128)
)
AS
	SET NOCOUNT ON

	DELETE [dbo].[CacheData] where PartitionName = @partitionName
	 




GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.GetItemCount    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.GetItemCount
(
	@partitionName varchar(128)
)
 AS 
	SET NOCOUNT ON

	SELECT COUNT(StorageKey) 
	  FROM [dbo].[CacheData] where PartitionName = @partitionName
	 




GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.LoadItems    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.LoadItems
(
	@partitionName varchar(128)
)
AS
	select 
		[Key], 
		Value, 
		RefreshAction, 
		Expirations, 
		ScavengingPriority, 
		LastAccessedTime
	from CacheData where PartitionName = @partitionName
	
	SET NOCOUNT ON
	RETURN 




GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.RemoveItem    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.RemoveItem
	(
		@partitionName varchar(128),
		@storageKey int
	)
AS
	delete from CacheData 
	where StorageKey = @storageKey and PartitionName = @partitionName
	
	SET NOCOUNT ON 
	RETURN 




GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

/****** Object:  Stored Procedure dbo.UpdateLastAccessedTime    Script Date: 8/25/2004 3:28:27 PM ******/



CREATE PROCEDURE dbo.UpdateLastAccessedTime
	(
		@partitionName varchar(128),
		@storageKey int,
		@lastAccessedTime DateTime
	)
AS
	update CacheData 
	set LastAccessedTime = @lastAccessedTime where [StorageKey] = @storageKey and PartitionName = @partitionName
	
	SET NOCOUNT ON
	RETURN 




GO

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

2.配置缓存config文件

如图所示

3.书写代码，实现缓存数据入库与提取缓存

添加名称空间：

using Microsoft.Practices.EnterpriseLibrary.Caching;
using Microsoft.Practices.EnterpriseLibrary.Caching.Expirations;

摘要代码：

    ICacheManager Catch = CacheFactory.GetCacheManager("WfssCacheManager");
            Catch.Add("ceshiCatch",DateTime.Now);
            Catch.Add("name", "嗜血幽冥.米路");
            Response.Write(Catch.GetData("name").ToString()+"<br/>");
            Response.Write(Catch.GetData("ceshiCatch").ToString() + "<br/>");

Catch.GetData("name")既为从数据库根据键值提取数据的方法，太简单了!可以试一下把前面的2个 Catch.Add注释掉验证一下o(∩_∩)o 。下班走人。。。。。。。

缓存已写入数据库，截图：