private OperationResponse ItemOperationAttachInterestArea(
Item item, AttachInterestArea operation, InterestArea interestArea, SendParameters sendParameters)
{
if (item.Disposed)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
lock (interestArea.SyncRoot)
{
interestArea.Detach();
interestArea.AttachToItem(item);
interestArea.UpdateInterestManagement();
}
// use item channel to ensure that this event arrives before any move or subscribe events
OperationResponse response = operation.GetOperationResponse(MethodReturnValue.Ok);
sendParameters.ChannelId = Settings.ItemEventChannel;
this.Peer.SendOperationResponse(response, sendParameters);
operation.OnComplete();
return null;
}
/// <summary>
/// Handles operation AttachInterestArea: Attaches an existing InterestArea to an existing Item.
/// </summary>
public OperationResponse OperationAttachInterestArea(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new AttachInterestArea(peer.Protocol, request);
if (!operation.IsValid)
{
return new OperationResponse(request.OperationCode) { ReturnCode = (int)ReturnCode.InvalidOperationParameter, DebugMessage = operation.GetErrorMessage() };
}
operation.OnStart();
InterestArea interestArea;
if (this.TryGetInterestArea(operation.InterestAreaId, out interestArea) == false)
{
return operation.GetOperationResponse((int)ReturnCode.InterestAreaNotFound, "InterestAreaNotFound");
}
Item item;
bool actorItem;
if (string.IsNullOrEmpty(operation.ItemId))
{
item = this.Avatar;
actorItem = true;
// set return vaues
operation.ItemId = item.Id;
}
else
{
actorItem = this.TryGetItem(operation.ItemId, out item);
}
if (actorItem)
{
// we are already in the item thread, invoke directly
return this.ItemOperationAttachInterestArea(item, operation, interestArea, sendParameters);
}
else
{
// search world cache just to see if item exists at all
if (this.World.ItemCache.TryGetItem(operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
else
{
// second parameter (peer) allows us to send an error event to the client (in case of an error)
item.Fiber.Enqueue(() => this.ExecItemOperation(() => this.ItemOperationAttachInterestArea(item, operation, interestArea, sendParameters), sendParameters));
// response is sent later
return null;
}
}
}