internal short UnRegisterSelectiveCallback(CacheItemRemovedCallback removedCallback)
{
if (removedCallback == null)
{
return(-1);
}
SelectiveRemoveCallbackWrapper callbackWrapper = null;
// callback is not already registered with the same method, so add
lock (SyncLockSelective)
{
//For selective callback, we dont remove the callback as it can create chaos if user try to unregister
//a callback more then one time or against wrong items.
callbackWrapper =
(SelectiveRemoveCallbackWrapper)_oldSelectiveCallbackPool.GetResource(removedCallback);
if (callbackWrapper != null)
{
short[] callbackIds =
UnregisterSelectiveNotification(callbackWrapper.MappingCallback, EventType.ItemRemoved);
return(callbackIds[1]);
}
return(-1);
}
}
internal short RegisterSelectiveCallback(CacheItemRemovedCallback removedCallback)
{
if (removedCallback == null)
{
return(-1);
}
lock (SyncLockSelective)
{
SelectiveRemoveCallbackWrapper callbackWrapper = null;
if (_oldSelectiveCallbackPool.GetResource(removedCallback) == null)
{
callbackWrapper = new SelectiveRemoveCallbackWrapper(removedCallback);
_oldSelectiveCallbackPool.AddResource(removedCallback, callbackWrapper);
_oldSelectiveMappingCallbackPool.AddResource(callbackWrapper, removedCallback);
}
else
{
callbackWrapper =
(SelectiveRemoveCallbackWrapper)_oldSelectiveCallbackPool.GetResource(removedCallback);
_oldSelectiveCallbackPool.AddResource(removedCallback, callbackWrapper);
}
short[] callbackIds = RegisterSelectiveEvent(callbackWrapper.MappingCallback, EventType.ItemRemoved,
EventDataFilter.DataWithMetadata);
return(callbackIds[1]);
}
}