internal static object GetLock(string key, TimeSpan refreshInterval, TimeSpan slidingExpiration, CacheItemRemovedCallback cacehRemoved, NHashtable table)
{
HashCacheEntry entry = new HashCacheEntry();
entry.RefreshInterval = refreshInterval;
entry.SlidingExpiration = slidingExpiration;
entry.LastUse = DateTime.Now;
entry.CacheRemoved = cacehRemoved;
entry.RefTable = table;
CacheLockbox.Add(key, entry);
return entry.Locker;
}
/// <summary>
/// Removes the element with the specified key from the NHashtable
/// </summary>
/// <param name="key">The key of the element to remove</param>
public void Remove(string key)
{
string cacheKey = CacheKey(key, _hashkey);
CacheEntry entry = null;
if (CacheLockbox.TryGetCacheEntry(cacheKey, out entry))
{
lock (CacheLockbox.GetLock(cacheKey))
{
HashCacheEntry hashEntry = (HashCacheEntry)entry;
if (hashEntry.CacheRemoved != null)
hashEntry.CacheRemoved(key, base[cacheKey], CacheItemRemovedReason.Removed);
NCache.Remove(cacheKey);
}
}
base.Remove(cacheKey);
}
/// <summary>
/// Callback method called when a object is removed for the ASP.NET cache.
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="reason">The reason an item was removed from the ASP.NET cache</param>
internal static void ItemRemovedCallback(string cacheKey, object value, CacheItemRemovedReason reason)
{
if (reason == CacheItemRemovedReason.Expired)
{
int num = cacheKey.IndexOf('-');
string key = cacheKey.Substring(0, num);
CacheEntry cacheEntry = null;
if (CacheLockbox.TryGetCacheEntry(cacheKey, out cacheEntry))
{
if (cacheEntry.LastUse.Add(cacheEntry.SlidingExpiration) > DateTime.Now) {
NCache.cache_.Insert(cacheKey, value, null, DateTime.Now.Add(TimeSpan.FromSeconds(30.0)), TimeSpan.Zero, CacheItemPriority.Low, null);
ThreadPool.QueueUserWorkItem(delegate(object o)
{
string k = o.ToString();
lock (CacheLockbox.GetInternalLock(k)) {
InternalCallback(k);
}
}, cacheKey);
}
else {
lock (CacheLockbox.GetLock(cacheKey))
{
HashCacheEntry hashEntry = (HashCacheEntry)cacheEntry;
if (hashEntry.CacheRemoved != null)
hashEntry.CacheRemoved(key, value, reason);
NHashtable table = hashEntry.RefTable;
if (table != null)
table.Remove(cacheKey);
}
CacheLockbox.Remove(cacheKey);
}
}
}
}