/// <summary>
/// Removes all expired items from the dictionary.
/// </summary>
public void RemoveExpiredItems()
{
var removeList = innerDictionary.Where(kvp => kvp.Value.HasExpired).ToList();
foreach (var kvp in removeList)
{
ItemExpired?.Invoke(this, new ExpirableItemRemovedEventArgs <TKey, TValue>(kvp.Key, kvp.Value.Value));
innerDictionary.Remove(kvp.Key);
}
}
public void ExpireCacheItems()
{
var now = DateTimeOffset.UtcNow;
Parallel.ForEach(_cacheItems, item =>
{
if (now - item.Value.LastAccessed >= _cacheExpirationDuration)
{
CacheItem <K, V> itemToRemove;
_cacheItems.TryRemove(item.Key, out itemToRemove);
ItemExpired?.Invoke(this, itemToRemove);
}
});
}
public bool ContainsKey(K key)
{
lock (lockObject)
{
if (CacheItems.ContainsKey(key))
{
if (CacheItems[key].HasExpired)
{
ItemExpired?.Invoke(this, new CacheItemRemovedEventArgs <K, T>
{
Key = key,
Value = CacheItems[key].Value
});
CacheItems.Remove(key);
return(false);
}
return(true);
}
return(false);
}
}
/// <summary>
/// Tries to the get item having the specified key. Returns <c>true</c> if the item exists and has not expired.
/// </summary>
public bool TryGetValue(TKey key, out TValue value)
{
ExpirableItem <TValue> item;
if (innerDictionary.TryGetValue(key, out item))
{
if (item.HasExpired)
{
ItemExpired?.Invoke(this, new ExpirableItemRemovedEventArgs <TKey, TValue>(key, item.Value));
innerDictionary.Remove(key);
value = default(TValue);
return(false);
}
value = item.Value;
return(true);
}
value = default(TValue);
return(false);
}