private CacheEventArg CreateCacheEventArgument(EventDataFilter dataFilter, string key, string cacheName, EventType eventType, EventCacheItem item, EventCacheItem oldItem, CacheItemRemovedReason removedReason)
{
EventCacheItem cloneItem = null;
EventCacheItem cloneOldItem = null;
if (dataFilter != EventDataFilter.None && item != null)
{
cloneItem = item.Clone() as EventCacheItem;
if (dataFilter == EventDataFilter.Metadata)
{
cloneItem.Value = null;
}
}
if (dataFilter != EventDataFilter.None && oldItem != null)
{
cloneOldItem = oldItem.Clone() as EventCacheItem;
if (dataFilter == EventDataFilter.Metadata)
{
cloneOldItem.Value = null;
}
}
CacheEventArg eventArg = new CacheEventArg(key, cacheName, eventType, cloneItem, null, removedReason);
if (eventType == EventType.ItemUpdated)
{
eventArg.OldItem = cloneOldItem;
}
return(eventArg);
}
/// <summary>
/// TheadSafe and no locks internally
/// </summary>
/// <param name="key"></param>
/// <param name="eventType">Should contain one type i.e. should not be used as a flag.
/// Every EventType should be executed from another thread</param>
/// <param name="item"></param>
/// <param name="oldItem"></param>
/// <param name="reason"></param>
/// <param name="_notifyAsync"></param>
/// <param name="eventhandle"></param>
internal void RaiseSelectiveCacheNotification(string key, EventType eventType, EventCacheItem item,
EventCacheItem oldItem, CacheItemRemovedReason reason, bool _notifyAsync, EventHandle eventhandle,
EventDataFilter dataFilter)
{
try
{
ResourcePool poolID = null;
CacheEventArg arg = null;
if ((eventType & EventType.ItemUpdated) != 0)
{
poolID = _selectiveUpdateEventIDPool;
}
else if ((eventType & EventType.ItemRemoved) != 0)
{
poolID = _selectiveRemoveEventIDPool;
}
arg = CreateCacheEventArgument(dataFilter, key, _cacheName, eventType, item, oldItem, reason);
if (poolID == null)
{
return;
}
CacheDataNotificationCallback callback =
poolID.GetResource((short)eventhandle.Handle) as CacheDataNotificationCallback;
if (callback == null)
{
return;
}
if (_notifyAsync)
{
System.Threading.ThreadPool.QueueUserWorkItem(waitC,
new object[] { callback, key, arg });
}
else
{
callback.Invoke(key, arg);
}
}
catch (Exception ex)
{
if (_logger != null && _logger.IsErrorEnabled)
{
_logger.CriticalInfo(ex.ToString());
}
}
}
private static void KeyNotificationMethod(string key, CacheEventArg cacheEventArgs)
{
switch (cacheEventArgs.EventType)
{
case EventType.ItemAdded:
Console.WriteLine("Key: " + key + " is added to the cache");
break;
case EventType.ItemRemoved:
Console.WriteLine("Key: " + key + " is removed from the cache");
break;
case EventType.ItemUpdated:
Console.WriteLine("Key: " + key + " is updated in the cache");
break;
}
}
public void OnCacheDataNotification(string key, CacheEventArg eventArgs)
{
switch (eventArgs.EventType)
{
case EventType.ItemAdded:
_parentCache.EventListener.OnItemAdded(key, false);
break;
case EventType.ItemUpdated:
_parentCache.EventListener.OnItemUpdated(key, false);
break;
case EventType.ItemRemoved:
_parentCache.EventListener.OnItemRemoved(key, eventArgs.Item.Value,
eventArgs.CacheItemRemovedReason, false);
break;
}
}
private CacheEventArg CreateCacheEventArgument(EventDataFilter dataFilter, string key,string cacheName,EventType eventType,EventCacheItem item,EventCacheItem oldItem,CacheItemRemovedReason removedReason)
{
EventCacheItem cloneItem = null;
EventCacheItem cloneOldItem = null;
if (dataFilter != EventDataFilter.None && item != null)
{
cloneItem = item.Clone() as EventCacheItem;
if (dataFilter == EventDataFilter.Metadata)
cloneItem.Value = null;
}
if (dataFilter != EventDataFilter.None && oldItem != null)
{
cloneOldItem = oldItem.Clone() as EventCacheItem;
if (dataFilter == EventDataFilter.Metadata)
cloneOldItem.Value = null;
}
CacheEventArg eventArg = new CacheEventArg(key, cacheName, eventType, cloneItem, null, removedReason);
if (eventType == EventType.ItemUpdated) eventArg.OldItem = cloneOldItem;
return eventArg;
}
public static void CacheDataModified(string @string, CacheEventArg cacheEventArgs)
{
Console.WriteLine("Cache data modification notification for the the item of the key : {0}", @string); //To change body of generated methods, choose Tools | Templates.
}
