SqlServer缓存依赖 示例

------------------------------------------------------------c#代码----------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Dynamic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using HuaTong.General.Utility;
using HuaTong.MeiDongPay.Entity.DBEntity.TableView;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using HuaTong.MeiDongPay.Entity.WebApi;
using System.Web.Caching;
using HuaTong.General.DBHelper;
using HuaTong.MeiDongPay.Entity.DBEntity;
using HuaTong.MeiDongPay.Entity.DBEntity.Procedure;

namespace HuaTong.MeiDongPay.Entity
{
    /// <summary>
    /// webapi返回公用参数实现
    /// </summary>
    public static class GlobalCache
    {
        static IDbHelper DB = DbFactory.CreateHelper();
        static object _sync = new object();
        static bool IsLoading = false;
        static string SqlCacheDepcName = "SqlCacheDepc";

        private static string[] CacheTables = new[]
        {
            "BuyerChannelSet",
            "MerchantChannelBuyerSet",
            "MerchantSlaveChannelBuyerSet",
            "MerchantChannelSet",
            "MerchantPayAccountSet",
            "BuyerInfo",
            "MerchantInfo",
            "PayAccountInfo",
            "PayChannelInfo",
            "BankInfo",
            "BuyerBankSet",
            "MerchantInfoExt",
            "BankAccountInfo"
        };

        public static List<BuyerChannelSet> BuyerChannelSet { get; private set; }
        public static List<MerchantChannelBuyerSet> MerchantChannelBuyerSet { get; private set; }
        public static List<MerchantSlaveChannelBuyerSet> MerchantSlaveChannelBuyerSet { get; private set; }
        public static List<MerchantChannelSet> MerchantChannelSet { get; private set; }
        public static List<MerchantPayAccountSet> MerchantPayAccountSet { get; private set; }
        public static List<BuyerInfo> BuyerInfo { get; private set; }
        public static List<MerchantInfo> MerchantInfo { get; private set; }
        public static List<PayAccountInfo> PayAccountInfo { get; private set; }
        public static List<PayChannelInfo> PayChannelInfo { get; private set; }
        public static List<BankInfo> BankInfo { get; private set; }
        public static List<BuyerBankSet> BuyerBankSet { get; private set; }
        public static List<MerchantInfoExt> MerchantInfoExt { get; private set; }
        public static List<BankAccountInfo> BankAccountInfo { get; private set; }

        static GlobalCache()
        {
            RegTableNotifications();

            GlobalCache.BuyerChannelSet = new List<BuyerChannelSet>();
            GlobalCache.BuyerInfo = new List<BuyerInfo>();
            GlobalCache.MerchantChannelBuyerSet = new List<MerchantChannelBuyerSet>();
            GlobalCache.MerchantSlaveChannelBuyerSet = new List<MerchantSlaveChannelBuyerSet>();
            GlobalCache.MerchantChannelSet = new List<MerchantChannelSet>();
            GlobalCache.MerchantInfo = new List<MerchantInfo>();
            GlobalCache.MerchantPayAccountSet = new List<MerchantPayAccountSet>();
            GlobalCache.PayAccountInfo = new List<PayAccountInfo>();
            GlobalCache.PayChannelInfo = new List<PayChannelInfo>();
            GlobalCache.BankInfo = new List<BankInfo>();
            GlobalCache.BuyerBankSet = new List<BuyerBankSet>();
            GlobalCache.MerchantInfoExt = new List<MerchantInfoExt>();
            GlobalCache.BankAccountInfo = new List<BankAccountInfo>();
        }

        /// <summary>
        /// 注册数据库缓存依赖内容
        /// </summary>
        private static void RegTableNotifications()
        {
            SqlCacheDependencyAdmin.EnableNotifications(DB.ConnctionString);
            string[] notiTables = SqlCacheDependencyAdmin.GetTablesEnabledForNotifications(DB.ConnctionString);
            foreach (var tableName in CacheTables)
            {
                if (!notiTables.Contains(tableName))
                {
                    SqlCacheDependencyAdmin.EnableTableForNotifications(DB.ConnctionString, tableName);
                }
            }
        }

        /// <summary>
        /// 缓存加载主入口
        /// </summary>
        public static void LoadCache()
        {
            if (!IsLoading)
            {
                IsLoading = true;

                List<Task> taskList = new List<Task>();
                foreach (var tbName in CacheTables)
                {
                    taskList.Add(Task.Factory.StartNew(delegate (object tbname)
                    {
                        LoadCache(tbname.ToString(), true);
                    }, tbName));
                }

                Task.WaitAll(taskList.ToArray());

                IsLoading = false;
            }
        }

        /// <summary>
        /// 按表名分别加载缓存集合
        /// </summary>
        private static void LoadCache(string tableName, bool isInit = false)
        {
            var proc = new Proc_LoadGlobalCache() { tableName = tableName };
            var dt = proc.ExecuteDataTable();

            switch (tableName)
            {
                case "BuyerChannelSet":
                    var tmp_list1 = dt.ToList<BuyerChannelSet>();
                    lock (_sync)
                    {
                        BuyerChannelSet.Clear();
                        BuyerChannelSet = tmp_list1;
                    }
                    break;
                case "MerchantChannelBuyerSet":
                    var tmp_list2 = dt.ToList<MerchantChannelBuyerSet>();
                    lock (_sync)
                    {
                        MerchantChannelBuyerSet.Clear();
                        MerchantChannelBuyerSet = tmp_list2;
                    }
                    break;
                case "MerchantSlaveChannelBuyerSet":
                    var tmp_list12 = dt.ToList<MerchantSlaveChannelBuyerSet>();
                    lock (_sync)
                    {
                        MerchantSlaveChannelBuyerSet.Clear();
                        MerchantSlaveChannelBuyerSet = tmp_list12;
                    }
                    break;
                case "MerchantChannelSet":
                    var tmp_list3 = dt.ToList<MerchantChannelSet>();
                    lock (_sync)
                    {
                        MerchantChannelSet.Clear();
                        MerchantChannelSet = tmp_list3;
                    }
                    break;
                case "MerchantPayAccountSet":
                    var tmp_list4 = dt.ToList<MerchantPayAccountSet>();
                    lock (_sync)
                    {
                        MerchantPayAccountSet.Clear();
                        MerchantPayAccountSet = tmp_list4;
                    }
                    break;
                case "BuyerInfo":
                    var tmp_list5 = dt.ToList<BuyerInfo>();
                    lock (_sync)
                    {
                        BuyerInfo.Clear();
                        BuyerInfo = tmp_list5;
                    }
                    break;
                case "MerchantInfo":
                    var tmp_list6 = dt.ToList<MerchantInfo>();
                    lock (_sync)
                    {
                        MerchantInfo.Clear();
                        MerchantInfo = tmp_list6;
                    }
                    break;
                case "PayAccountInfo":
                    var tmp_list8 = dt.ToList<PayAccountInfo>();
                    lock (_sync)
                    {
                        PayAccountInfo.Clear();
                        PayAccountInfo = tmp_list8;
                    }
                    break;
                case "PayChannelInfo":
                    var tmp_list7 = dt.ToList<PayChannelInfo>();
                    lock (_sync)
                    {
                        PayChannelInfo.Clear();
                        PayChannelInfo = tmp_list7;
                    }
                    break;
                case "BankInfo":
                    var tmp_list9 = dt.ToList<BankInfo>();
                    lock (_sync)
                    {
                        BankInfo.Clear();
                        BankInfo = tmp_list9;
                    }
                    break;
                case "BuyerBankSet":
                    var tmp_list10 = dt.ToList<BuyerBankSet>();
                    lock (_sync)
                    {
                        BuyerBankSet.Clear();
                        BuyerBankSet = tmp_list10;
                    }
                    break;
                case "MerchantInfoExt":
                    var tmp_list11 = dt.ToList<MerchantInfoExt>();
                    lock (_sync)
                    {
                        MerchantInfoExt.Clear();
                        MerchantInfoExt = tmp_list11;
                    }
                    break;

                case "BankAccountInfo":
                    var tmp_list13 = dt.ToList<BankAccountInfo>();
                    lock (_sync)
                    {
                        BankAccountInfo.Clear();
                        BankAccountInfo = tmp_list13;
                    }
                    break;
            }

            if (isInit)
            {
                //初始化时创建缓存依赖
                SqlCacheDependency sqlDependency = new SqlCacheDependency(SqlCacheDepcName, tableName);
                string cacheKey = "@@@" + tableName + "@@@";
                HttpRuntime.Cache.Insert(cacheKey, 1, sqlDependency, Cache.NoAbsoluteExpiration,
                    Cache.NoSlidingExpiration, OnCacheUpdateCallback);
            }
        }

        /// <summary>
        /// 获取缓存个数
        /// </summary>
        /// <returns></returns>
        public static dynamic CacheCount()
        {
            var obj = new
            {
                BInfo_Count = GlobalCache.BuyerInfo.Count,
                MInfo_Count = GlobalCache.MerchantInfo.Count,
                AInfo_Count = GlobalCache.PayAccountInfo.Count,
                CInfo_Count = GlobalCache.PayChannelInfo.Count,
                BCSet_Count = GlobalCache.BuyerChannelSet.Count,
                MCBSet_Count = GlobalCache.MerchantChannelBuyerSet.Count,
                MSCBSet_Count = GlobalCache.MerchantSlaveChannelBuyerSet.Count,
                MCSet_Count = GlobalCache.MerchantChannelSet.Count,
                MASet_Count = GlobalCache.MerchantPayAccountSet.Count
            };

            return obj;
        }

        private static void OnCacheUpdateCallback(string key, CacheItemUpdateReason reason, out object expensiveObject,
            out CacheDependency dependency, out DateTime absoluteExpiration, out TimeSpan slidingExpiration)
        {
            //缓存值增加计数
            string strValue = Convert.ToString(HttpRuntime.Cache.Get(key));
            long cacheValue;
            if (!long.TryParse(strValue, out cacheValue)) cacheValue = 1;
            cacheValue++;

            //重新加载缓存集合
            string tableName = key.Trim('@');
            LoadCache(tableName);

            //设置缓存所需返回值
            expensiveObject = cacheValue;
            dependency = new SqlCacheDependency(SqlCacheDepcName, tableName);
            absoluteExpiration = Cache.NoAbsoluteExpiration;
            slidingExpiration = Cache.NoSlidingExpiration;
        }
    }
}

------------------------------------------------------------c#代码-------------------------------------------------------

------------------------------------------------------------sqlserver存储过程代码-------------------------------------------------------

USE [MeiDongPay]
GO
/****** Object: StoredProcedure [dbo].[AspNet_SqlCachePollingStoredProcedure] Script Date: 05/12/2017 15:34:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AspNet_SqlCachePollingStoredProcedure] AS
SELECT tableName, changeId FROM dbo.AspNet_SqlCacheTablesForChangeNotification
RETURN 0

USE [MeiDongPay]
GO
/****** Object: StoredProcedure [dbo].[AspNet_SqlCacheQueryRegisteredTablesStoredProcedure] Script Date: 05/12/2017 15:35:50 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AspNet_SqlCacheQueryRegisteredTablesStoredProcedure]
AS
SELECT tableName FROM dbo.AspNet_SqlCacheTablesForChangeNotification

USE [MeiDongPay]
GO
/****** Object: StoredProcedure [dbo].[AspNet_SqlCacheRegisterTableStoredProcedure] Script Date: 05/12/2017 15:36:03 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AspNet_SqlCacheRegisterTableStoredProcedure]
@tableName NVARCHAR(450)
AS
BEGIN

DECLARE @triggerName AS NVARCHAR(3000)
DECLARE @fullTriggerName AS NVARCHAR(3000)
DECLARE @canonTableName NVARCHAR(3000)
DECLARE @quotedTableName NVARCHAR(3000)

/* Create the trigger name */
SET @triggerName = REPLACE(@tableName, '[', '__o__')
SET @triggerName = REPLACE(@triggerName, ']', '__c__')
SET @triggerName = @triggerName + '_AspNet_SqlCacheNotification_Trigger'
SET @fullTriggerName = 'dbo.[' + @triggerName + ']'

/* Create the cannonicalized table name for trigger creation */
/* Do not touch it if the name contains other delimiters */
IF (CHARINDEX('.', @tableName) <> 0 OR
CHARINDEX('[', @tableName) <> 0 OR
CHARINDEX(']', @tableName) <> 0)
SET @canonTableName = @tableName
ELSE
SET @canonTableName = '[' + @tableName + ']'

/* First make sure the table exists */
IF (SELECT OBJECT_ID(@tableName, 'U')) IS NULL
BEGIN
RAISERROR ('00000001', 16, 1)
RETURN
END

BEGIN TRAN
/* Insert the value into the notification table */
IF NOT EXISTS (SELECT tableName FROM dbo.AspNet_SqlCacheTablesForChangeNotification WITH (NOLOCK) WHERE tableName = @tableName)
IF NOT EXISTS (SELECT tableName FROM dbo.AspNet_SqlCacheTablesForChangeNotification WITH (TABLOCKX) WHERE tableName = @tableName)
INSERT dbo.AspNet_SqlCacheTablesForChangeNotification
VALUES (@tableName, GETDATE(), 0)

/* Create the trigger */
SET @quotedTableName = QUOTENAME(@tableName, '''')
IF NOT EXISTS (SELECT name FROM sysobjects WITH (NOLOCK) WHERE name = @triggerName AND type = 'TR')
IF NOT EXISTS (SELECT name FROM sysobjects WITH (TABLOCKX) WHERE name = @triggerName AND type = 'TR')
EXEC('CREATE TRIGGER ' + @fullTriggerName + ' ON ' + @canonTableName +'
FOR INSERT, UPDATE, DELETE AS BEGIN
SET NOCOUNT ON
EXEC dbo.AspNet_SqlCacheUpdateChangeIdStoredProcedure N' + @quotedTableName + '
END
')
COMMIT TRAN
END

USE [MeiDongPay]
GO
/****** Object: StoredProcedure [dbo].[AspNet_SqlCacheUnRegisterTableStoredProcedure] Script Date: 05/12/2017 15:36:10 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AspNet_SqlCacheUnRegisterTableStoredProcedure]
@tableName NVARCHAR(450)
AS
BEGIN

BEGIN TRAN
DECLARE @triggerName AS NVARCHAR(3000)
DECLARE @fullTriggerName AS NVARCHAR(3000)
SET @triggerName = REPLACE(@tableName, '[', '__o__')
SET @triggerName = REPLACE(@triggerName, ']', '__c__')
SET @triggerName = @triggerName + '_AspNet_SqlCacheNotification_Trigger'
SET @fullTriggerName = 'dbo.[' + @triggerName + ']'

/* Remove the table-row from the notification table */
IF EXISTS (SELECT name FROM sysobjects WITH (NOLOCK) WHERE name = 'AspNet_SqlCacheTablesForChangeNotification' AND type = 'U')
IF EXISTS (SELECT name FROM sysobjects WITH (TABLOCKX) WHERE name = 'AspNet_SqlCacheTablesForChangeNotification' AND type = 'U')
DELETE FROM dbo.AspNet_SqlCacheTablesForChangeNotification WHERE tableName = @tableName

/* Remove the trigger */
IF EXISTS (SELECT name FROM sysobjects WITH (NOLOCK) WHERE name = @triggerName AND type = 'TR')
IF EXISTS (SELECT name FROM sysobjects WITH (TABLOCKX) WHERE name = @triggerName AND type = 'TR')
EXEC('DROP TRIGGER ' + @fullTriggerName)

COMMIT TRAN
END

USE [MeiDongPay]
GO
/****** Object: StoredProcedure [dbo].[AspNet_SqlCacheUpdateChangeIdStoredProcedure] Script Date: 05/12/2017 15:36:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AspNet_SqlCacheUpdateChangeIdStoredProcedure]
@tableName NVARCHAR(450)
AS

BEGIN
UPDATE dbo.AspNet_SqlCacheTablesForChangeNotification WITH (ROWLOCK) SET changeId = changeId + 1
WHERE tableName = @tableName
END

------------------------------------------------------------sqlserver存储过程代码-------------------------------------------------------