Sitecore Cache Manager

namespaceXXX. shared.infrastructure.caching{usingSystem; usingSystem.Collections.Generic; usingSystem.Linq; usingSystem.Runtime.Caching; usingSystem.Threading; usingSitecore.data; usingSitecore.diagnostics; usingsitecore.sites; /// <summary>    ///The cache manager. /// </summary>     Public Sealed classCacheManager {#regionStatic fieldsPrivate Static ReadOnlyLazy<cachemanager> Instance =NewLazy<cachemanager> (() =NewCacheManager (), lazythreadsafetymode.executionandpublication); Private Static ReadOnly ObjectSyncLock =New Object(); #endregion        #regionFieldsPrivate ReadOnlyObjectCache cache =Memorycache.default; #endregion        #regionPublic Properties/// <summary>        ///Gets the current. /// </summary>         Public StaticCacheManager Current {Get{returnInstance.value;} }        #endregion        #regionPublic Methods and Operators/// <summary>        ///The Add. /// </summary>        /// <param name= "key" >        ///The key. /// </param>        /// <param name= "Data" >        ///The data. /// </param>        /// <param name= "expirytimeinhours" >        /// </param>        /// <typeparam name= "T" >        /// </typeparam>         Public voidAdd<t> (stringKey, T data,DoubleExpirytimeinhours =6)whereT:class        {            Try            {                if(Data = =NULL)                {                    Throw NewArgumentNullException ("Data","cannot add null to the cache."); }                Lock(SyncLock) {varPolicy =NewCacheItemPolicy {absoluteexpiration=DateTime.Now.AddHours (expirytimeinhours), priority=Cacheitempriority.default, slidingexpiration=TimeSpan.Zero};  This. Cache.                ADD (key, data, policy); }            }            Catch(Exception ex) {Log.debug (ex). Message, This); }        }        /// <summary>        ///The contains key. /// </summary>        /// <param name= "key" >        ///The key. /// </param>        /// <returns>        /// the<see cref= "bool"/>. /// </returns>         Public BOOLContainsKey (stringkey) {            Lock(SyncLock) {return  This. Cache.            Contains (key); }        }        /// <summary>        ///The get. /// </summary>        /// <param name= "key" >        ///The key. /// </param>        /// <typeparam name= "T" >        /// </typeparam>        /// <returns>        /// the<see cref= "T"/>. /// </returns>         PublicT get<t> (stringKeywhereT:class        {            Lock(SyncLock) {return  This. ContainsKey (key)? This. cache. Get (Key) asT:default(T); }        }        /// <summary>        ///The get all cache keys. /// </summary>        /// <returns>        /// the<see cref= "Ienumerable{t}"/>. /// </returns>         Publicienumerable<string>Getallcachekeys () {return  This. cache. Select (item =item. Key).        ToList (); }        /// <summary>        ///The Purge. /// </summary>         Public voidPurge () {Lock(SyncLock) {varKeys = This. cache. Select (item =item.                Key); Keys. ToList (). ForEach ( This.            Remove); }        }        /// <summary>        ///The Remove. /// </summary>        /// <param name= "key" >        ///The key. /// </param>         Public voidRemove (stringkey) {            Lock(SyncLock) {if(! This. ContainsKey (key)) {return; }                 This. Cache.            Remove (key); }        }         Public voidRemovesitecoreitemcache (stringIdstringsiteName) {            if(!string. IsNullOrEmpty (ID) &&!string. IsNullOrEmpty (SiteName)) {using(NewSitecontextswitcher (Sitecontextfactory.getsitecontext (siteName))) {                    vardb =SiteContext.Current.Database; if(db! =NULL) {db. Caches.ItemCache.RemoveItem (NewID (ID)); Db. Caches.DataCache.RemoveItemInformation (NewID (ID)); Db.                    Caches.StandardValuesCache.RemoveKeysContaining (ID); }                }            }        }        /// <summary>        ///The remove by prefix. /// </summary>        /// <param name= "prefix" >        ///The prefix. /// </param>         Public voidRemovebyprefix (stringprefix) {            Lock(SyncLock) {varKeys = This. cache. Where (item = Item. Key.indexof (prefix, stringcomparison.ordinalignorecase)! =-1); Keys. ToList (). ForEach (Item= This. Remove (item.            Key)); }        }        #endregion    }}

Sitecore Cache Manager