/// <summary>
/// Handles operation UnsubscribeItem: manually unsubscribes an existing InterestArea from an existing Item.
/// The client receives event ItemUnsubscribed on success.
/// </summary>
public OperationResponse OperationUnsubscribeItem(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new UnsubscribeItem(peer.Protocol, request);
if (!operation.IsValid)
{
return new OperationResponse(request.OperationCode) { ReturnCode = (int)ReturnCode.InvalidOperationParameter, DebugMessage = operation.GetErrorMessage() };
}
operation.OnStart();
Item item;
bool actorItem = this.TryGetItem(operation.ItemId, out item);
if (actorItem == false)
{
if (this.World.ItemCache.TryGetItem(operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
}
this.interestItems.UnsubscribeItem(item);
if (actorItem)
{
// we are already in the item thread, invoke directly
return this.ItemOperationUnsubscribeItem(item, operation);
}
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.ItemOperationUnsubscribeItem(item, operation), sendParameters));
// operation continues later
return null;
}
}
private OperationResponse ItemOperationUnsubscribeItem(Item item, UnsubscribeItem operation)
{
if (item.Disposed)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
this.interestItems.UnsubscribeItem(item);
var unsubscribeEvent = new ItemUnsubscribed { ItemId = item.Id };
var eventData = new EventData((byte)EventCode.ItemUnsubscribed, unsubscribeEvent);
this.Peer.SendEvent(eventData, new SendParameters { ChannelId = Settings.ItemEventChannel });
// don't send response
operation.OnComplete();
return null;
}
/// <summary>
/// Handles operation <see cref = "UnsubscribeItem" />: Unsubscribes an existing <see cref = "InterestArea" /> from an existing <see cref = "Item" />.
/// The client receives event <see cref = "ItemUnsubscribed" /> on success.
/// </summary>
/// <param name = "peer">
/// The client peer.
/// </param>
/// <param name = "request">
/// The request.
/// </param>
/// <returns>
/// Null or an <see cref = "OperationResponse" /> with error code <see cref = "ReturnCode.InterestAreaNotFound" /> or <see cref = "ReturnCode.ItemNotFound" />.
/// </returns>
public OperationResponse OperationUnsubscribeItem(PeerBase peer, OperationRequest request)
{
var operation = new UnsubscribeItem(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");
}
IWorld world = this.World;
Item item;
bool actorItem = this.TryGetItem(operation.ItemType, operation.ItemId, out item);
if (actorItem == false)
{
if (world.ItemCache.TryGetItem(operation.ItemType, operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
}
lock (interestArea.SyncRoot)
{
interestArea.UnsubscribeItem(item);
}
// don't send response
return null;
}