/// <summary>
/// Reaises the custom item remove call baack.
/// </summary>
/// <param name="key"></param>
/// <param name="cbEntry"></param>
internal void RaiseCustomRemoveCalbackNotifier(object key, CacheEntry cacheEntry, ItemRemoveReason reason, bool async, OperationContext operationContext, EventContext eventContext)
{
ArrayList destinations = null;
ArrayList nodes = null;
Hashtable intendedNotifiers = new Hashtable();
CallbackEntry cbEntry = cacheEntry.Value as CallbackEntry;
if (cbEntry != null && cbEntry.ItemRemoveCallbackListener.Count > 0)
{
if (_stats.Nodes != null)
{
nodes = _stats.Nodes.Clone() as ArrayList;
destinations = new ArrayList();
foreach (CallbackInfo cbInfo in cbEntry.ItemRemoveCallbackListener)
{
if (reason == ItemRemoveReason.Expired && cbInfo != null && !cbInfo.NotifyOnExpiration)
continue;
int index = nodes.IndexOf(new NodeInfo(Cluster.LocalAddress));
if (index != -1 && ((NodeInfo)nodes[index]).ConnectedClients.Contains(cbInfo.Client))
{
if (!destinations.Contains(Cluster.LocalAddress))
{
destinations.Add(Cluster.LocalAddress);
}
intendedNotifiers[cbInfo] = Cluster.LocalAddress;
continue;
}
else
{
foreach (NodeInfo nInfo in nodes)
{
if (nInfo.ConnectedClients != null && nInfo.ConnectedClients.Contains(cbInfo.Client))
{
if (!destinations.Contains(nInfo.Address))
{
destinations.Add(nInfo.Address);
intendedNotifiers[cbInfo] = nInfo.Address;
break;
}
}
}
}
}
}
}
if (destinations != null && destinations.Count > 0)
{
if (operationContext == null) operationContext = new OperationContext();
if (eventContext == null || !eventContext.HasEventID(EventContextOperationType.CacheOperation))
{
eventContext = CreateEventContext(operationContext, Persistence.EventType.ITEM_REMOVED_CALLBACK);
eventContext.Item = CacheHelper.CreateCacheEventEntry(cbEntry.ItemRemoveCallbackListener, cacheEntry);
eventContext.Add(EventContextFieldName.ItemRemoveCallbackList, cbEntry.ItemRemoveCallbackListener.Clone());
}
object[] packed = new object[] { key, reason, intendedNotifiers, operationContext, eventContext };
///Incase of parition, there can be same clients connected
///to multiple server. therefore the destinations list will contain more then
///one servers. so the callback will be sent to the same client through different server
///to avoid this, we will check the list for local server. if client is connected with
///local node, then there is no need to send callback to all other nodes
///if there is no local node, then we select the first node in the list.
RaiseCustomRemoveCalbackNotifier(destinations, packed, async);
}
}