private OperationResponse ItemOperationSubscribeItem(Item item, SubscribeItem operation)
{
if (item.Disposed)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
this.interestItems.SubscribeItem(item);
var subscribeEvent = new ItemSubscribed
{
ItemId = item.Id,
ItemType = item.Type,
Position = item.Position,
PropertiesRevision = item.PropertiesRevision,
Rotation = item.Rotation
};
var eventData = new EventData((byte)EventCode.ItemSubscribed, subscribeEvent);
this.Peer.SendEvent(eventData, new SendParameters { ChannelId = Settings.ItemEventChannel });
if (operation.PropertiesRevision.HasValue == false || operation.PropertiesRevision.Value != item.PropertiesRevision)
{
var properties = new ItemPropertiesSet
{
ItemId = item.Id,
PropertiesRevision = item.PropertiesRevision,
PropertiesSet = new Hashtable(item.Properties)
};
var propEventData = new EventData((byte)EventCode.ItemPropertiesSet, properties);
this.Peer.SendEvent(propEventData, new SendParameters { ChannelId = Settings.ItemEventChannel });
}
// don't send response
operation.OnComplete();
return null;
}
/// <summary>
/// Handles operation SubscribeItem: Manually subscribes item (does not affect interest area updates).
/// The client receives event ItemSubscribed on success.
/// </summary>
/// <remarks>
/// If the submitted SubscribeItem.PropertiesRevision is null or smaller than the item Item.PropertiesRevision event ItemProperties is sent to the client.
/// </remarks>
public OperationResponse OperationSubscribeItem(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new SubscribeItem(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");
}
}
if (actorItem)
{
// we are already in the item thread, invoke directly
return this.ItemOperationSubscribeItem(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.ItemOperationSubscribeItem(item, operation), sendParameters));
// operation continues later
return null;
}
}