CacheDataService - CacheDataSetAsList

/// <summary> /// Caches provided data set as a list from IQueryable by specified key /// </summary> /// <typeparam name="T">Cacheable type</typeparam> /// <typeparam name="U">Sitefinity type</typeparam> /// <param name="sfContentQuery">Sitefintiy data set to be cached</param> /// <param name="key">Key associated with set in cache</param> public void CacheDataSetAsList<T, U>(IQueryable<U> sfContentQuery, string key, int expirationMinutes = 0) where T: ICacheData<U> { //create instance of a cacheable data type T cacheableDataItem = (T)Activator.CreateInstance(typeof(T)); //get the content type that we are working with Type cacheableType = cacheableDataItem.GetContentType<U>(); //get a string of that content type, to be used in the key string cacheableTypeName = cacheableDataItem.GetContentType<U>().ToString(); Logger.Writer.Write("pulling items from cache"); //try to fetch these cached items from the cache List<T> cachedItems = (List<T>)CacheManager[key]; //as long as nothing is returned from the cache, proceed with caching items if (cachedItems == null) { Logger.Writer.Write("pulled items null"); //initialize cachedItems to new list cachedItems = new List<T>(); lock (itemLock) { //if the content type is not null, proceed with pulling in data from database if (cacheableType != null) { //initialize a list of cacheable content items List<U> items = new List<U>(); items = sfContentQuery.ToList<U>(); //if the list of items is not null and there is 1 or more, begin process for adding them to cache if (items != null && items.Count > 0) { //create list of dependencies List<DataItemCacheDependency> dependencies = new List<DataItemCacheDependency>(); //create list of parameters List<ICacheItemExpiration> cacheParameters = new List<ICacheItemExpiration>(); //foreach sitefinity content item in items foreach (U item in items) { //create a new instance of a cacheable object T dataItem = (T)Activator.CreateInstance(typeof(T)); //call process item to move over cacheablecontent item values into the cacheable object dataItem.ProcessItem(item); //add the new object to the list of cached items cachedItems.Add(dataItem); //create dependency on this items id DataItemCacheDependency dependency = new DataItemCacheDependency(typeof(U), dataItem.Id); //add dependency dependencies.Add(dependency); } //if the list of cachedItems is not null and there is 1 or more, add them to cache if (cachedItems != null && cachedItems.Count > 0) { //if more than 1 dependency add them to cacheparameters if (dependencies.Count > 0) cacheParameters.AddRange(dependencies); //add sliding expiration time to cache parameters if(expirationMinutes > 0) cacheParameters.Add(new SlidingTime(TimeSpan.FromMinutes(expirationMinutes))); else cacheParameters.Add(new SlidingTime(TimeSpan.FromMinutes(DefaultExpirationMinutes))); //add items, key, and parameters to cache through CacheManager CacheManager.Add( key, cachedItems, CacheItemPriority.Normal, null, cacheParameters.ToArray<ICacheItemExpiration>()); } } else { cachedItems = new List<T>(); lock (itemLock) { //create list of parameters List<ICacheItemExpiration> cacheParameters = new List<ICacheItemExpiration>(); //add sliding expiration time to cache parameters if (expirationMinutes > 0) cacheParameters.Add(new SlidingTime(TimeSpan.FromMinutes(expirationMinutes))); else cacheParameters.Add(new SlidingTime(TimeSpan.FromMinutes(DefaultExpirationMinutes))); //add items, key, and parameters to cache through CacheManager CacheManager.Add( key, cachedItems, CacheItemPriority.Normal, null, cacheParameters.ToArray<ICacheItemExpiration>()); } } } } } }