public static bool Update(string key)
{
object lck = CacheLockbox.GetInternalLock(key);
if (lck == null)
{
return(false);
}
lock (lck)
InternalCallback(key);
return(true);
}
internal static void ItemRemovedCallback(string key, object value, CacheItemRemovedReason reason)
{
if (reason == CacheItemRemovedReason.Expired)
{
CacheEntry cacheEntry = CacheLockbox.GetCacheEntry(key);
// If the sliding expirarion was not reached...
if (cacheEntry.LastUse.Add(cacheEntry.SlidingExpiration) > DateTime.Now)
{
//... the object will be temporary inserted in cache...
cache_.Insert(key, value, null, DateTime.Now.Add(TimeSpan.FromSeconds(30.0)), TimeSpan.Zero, CacheItemPriority.Low, null);
//...reload and reinsert the item into the cache again.
ThreadPool.QueueUserWorkItem(delegate(object o) {
string s = o.ToString();
lock (CacheLockbox.GetInternalLock(s)) {
InternalCallback(s);
}
}, key);
}
}
}
internal static object InternalCallback(string key)
{
CacheEntry cacheEntry = null;
if (!CacheLockbox.TryGetCacheEntry(key, out cacheEntry))
{
return(null);
}
CacheLoaderDelegate cacheLoader = cacheEntry.CacheLoader;
if (cacheLoader == null)
{
return(null);
}
object obj2 = null;
try {
obj2 = cacheLoader();
} catch (Exception exception) {
if (cache_loader_error_delegate_ != null)
{
try {
cache_loader_error_delegate_(key, exception);
}
catch { }
}
}
if (obj2 != null)
{
Insert(key, obj2, null, (int)cacheEntry.RefreshInterval.TotalSeconds, CacheItemPriority.Normal, new CacheItemRemovedCallback(NCache.ItemRemovedCallback));
CacheLockbox.UpdateCacheEntry(key, DateTime.Now);
}
return(obj2);
}
public static object GetCacheEntryLock(string key, TimeSpan refreshInterval, TimeSpan slidingExpiration, CacheLoaderDelegate loaderDelegate)
{
return(CacheLockbox.GetLock(key, refreshInterval, slidingExpiration, loaderDelegate));
}
public static object GetCacheEntryLock(string key, int refreshIntervalSeconds, int slidingExpirationSeconds, CacheLoaderDelegate loaderDelegate)
{
return(CacheLockbox.GetLock(key, TimeSpan.FromSeconds((double)(refreshIntervalSeconds * Factor)), TimeSpan.FromSeconds((double)(slidingExpirationSeconds * Factor)), loaderDelegate));
}
public static object GetCacheEntryLock(string key)
{
return(CacheLockbox.GetLock(key));
}