/// <summary>
/// Forces a revalidation of all items in the cache and removes exeeded items
/// </summary>
public void Cleanup()
{
if (_cacheItems.IsEmpty)
{
return;
}
var utcNow = DateTime.UtcNow;
var discardedItems = new List <CacheItem <TKey, TValue> >();
foreach (var cacheItem in _cacheItems.Values)
{
if ((cacheItem.Policy == null) || (cacheItem.Policy.HasExpired(utcNow) == false))
{
continue;
}
discardedItems.Add(cacheItem);
_cacheItems.TryRemove(cacheItem.Key, out _);
}
if (discardedItems.Count > 0)
{
ItemsDiscarded?.Invoke(this, new CacheItemsDiscardedEventArgs <TKey, TValue>(discardedItems));
}
}
/// <summary>
/// Removes all items of the cache
/// </summary>
public void Clear()
{
var discardedItems = _cacheItems.Values.ToList();
_cacheItems.Clear();
if (discardedItems.Count > 0)
{
ItemsDiscarded?.Invoke(this, new CacheItemsDiscardedEventArgs <TKey, TValue>(discardedItems));
}
}
/// <summary>
/// Removes a value by its key
/// </summary>
public bool Discard(TKey key)
{
if (_cacheItems.TryRemove(key, out var item) == false)
{
return(false);
}
ItemsDiscarded?.Invoke(this, new CacheItemsDiscardedEventArgs <TKey, TValue>(new[] { item }));
return(true);
}