private static void PurgeItemFromCache(string name, string iterationKey)
{
ICacheItem item = CreateSaveItemInstance(CacheControllerSection, name, iterationKey);
if (item.IsClustered)
{
ClusteredCacheManager.PurgeCacheItem(GetCacheKey(item, iterationKey));
}
else
{
HttpRuntime.Cache.Remove(GetCacheKey(item, iterationKey));
}
}
/// <summary>
/// Loads the object from cache.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="name">The name.</param>
/// <param name="iterationKey">The iteration key.</param>
/// <param name="loadObject">The load object.</param>
/// <returns></returns>
private static T LoadObjectFromCache <T>(string name, string iterationKey, LoadSerializedObjectDelegate <T> loadObject)
{
T returnObject = default(T);
// get the section
ICacheController section = CacheControllerSection;
ICacheItem item = CreateSaveItemInstance(section, name, iterationKey);
string cacheKey = GetCacheKey(item, iterationKey);
if (section.Enabled && item.Enabled)
{// use cache
if (item.IsClustered)
{
try
{
returnObject = (T)ClusteredCacheManager.GetCacheItem(
cacheKey
, delegate { return(loadObject()); }
, item.CacheItemPriority
, true);
}
catch (Exception e)
{
throw new CachingException("An error occurred during the retrieval of the business object from the cache collection. See the inner exception for further details.", e);
}
}
else
{
lock (_CacheLock)
{
if (HttpRuntime.Cache[cacheKey] == null)
{// get new object and cache it
try
{
if (item.Minutes < 0 && item.Seconds < 0)
{
throw new CachingException("You must specify either a seconds or minutes value for a non clusterd cache item.");
}
DateTime expire = item.Seconds < 0 ? DateTime.UtcNow.AddMinutes(item.Minutes) : DateTime.UtcNow.AddSeconds(item.Seconds);
returnObject = loadObject();
if (returnObject != null)
{
HttpRuntime.Cache.Remove(cacheKey);
HttpRuntime.Cache.Insert(cacheKey, returnObject, null, expire, System.Web.Caching.Cache.NoSlidingExpiration, item.CacheItemPriority, null);
}
}
catch (Exception e)
{
throw new CachingException("An error occurred during the execution of the loadObject delegate. See the inner exception for further details.", e);
}
}
else
{// get object from cache
try
{
returnObject = (T)HttpRuntime.Cache[cacheKey];
}
catch (Exception e)
{
throw new CachingException("An error occurred during the retrieval of the business object from the cache collection. See the inner exception for further details.", e);
}
}
}
}
}
else
{// don't use cache
try
{
returnObject = loadObject();
}
catch (Exception e)
{
throw new CachingException("An error occurred during the execution of the loadObject delegate. See the inner exception for further details.", e);
}
}
return(returnObject);
}
