public void OnExpiring()
{
if (!Expired)
{
Expiring?.Invoke(this, EventArgs.Empty);
Expired = true;
}
}
/// <summary>
/// Remove item from cache by key.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="raiseEvents">Indicates whether events should be raised.</param>
/// <param name="action">The action that need to be executed in synchronization with the item cache removal.</param>
/// <returns>The value indicating whether the item was removed.</returns>
private bool RemoveItem(TKey key, bool raiseEvents, Action action = null)
{
// Try to get item, if there is no item by that key then return true to indicate that item was removed.
var item = default(CacheStorageValueInfo <TValue>);
if (!_dictionary.TryGetValue(key, out item))
{
return(true);
}
action?.Invoke();
var cancel = false;
var expirationPolicy = item.ExpirationPolicy;
if (raiseEvents)
{
var expiringEventArgs = new ExpiringEventArgs <TKey, TValue>(key, item.Value, expirationPolicy);
Expiring.SafeInvoke(this, expiringEventArgs);
cancel = expiringEventArgs.Cancel;
expirationPolicy = expiringEventArgs.ExpirationPolicy;
}
if (cancel)
{
if (expirationPolicy == null && _defaultExpirationPolicyInitCode != null)
{
expirationPolicy = _defaultExpirationPolicyInitCode.Invoke();
}
_dictionary[key] = new CacheStorageValueInfo <TValue>(item.Value, expirationPolicy);
return(false);
}
_dictionary.Remove(key);
bool dispose = _disposeValuesOnRemoval;
if (raiseEvents)
{
var expiredEventArgs = new ExpiredEventArgs <TKey, TValue>(key, item.Value, dispose);
Expired.SafeInvoke(this, expiredEventArgs);
dispose = expiredEventArgs.Dispose;
}
if (dispose)
{
item.DisposeValue();
}
return(true);
}
