private void HandleUnsubscribeEventMessage(UnsubscribeEventMessage unsubscribeEventMessage,
IInputContext context)
{
if (!_objectsRepository.TryGetObject(unsubscribeEventMessage.ObjectId, out var objectAdapter) || objectAdapter == null)
{
WriteObjectNotFoundError(context, unsubscribeEventMessage.ObjectId);
return;
}
if (!objectAdapter.Events.TryGetValue(unsubscribeEventMessage.EventName, out var ev))
{
WriteEventNotFoundError(context, unsubscribeEventMessage.ObjectId, unsubscribeEventMessage.EventName);
return;
}
ISubscription subscription;
lock (_subscriptions)
{
if (!_subscriptions.TryGetValue(ev, out subscription))
{
//No exception or error is needed (same as for standard c# events when unsubscribed from a delegate that was not subscribed before).
return;
}
_subscriptions.Remove(ev);
}
subscription.Dispose();
var ackMessage = new AckMessage(unsubscribeEventMessage.ClientHostAddress);
context.Write(ackMessage.ToFrame());
}
public void Unsubscribe(string objectId, string eventName, Delegate handler)
{
if (_disposed)
{
throw new ObjectDisposedException(nameof(EventHandlersRepository));
}
var eventId = new EventId
{
ObjectId = objectId,
EventName = eventName
};
lock (_events)
{
var subscriptionRepository = _events[eventId];
subscriptionRepository.Unsubscribe(handler);
if (subscriptionRepository.IsEmpty)
{
var unsubscribeMessage = new UnsubscribeEventMessage(_clientHostAddress, objectId, eventName);
_outputChannel.SendWithAck(unsubscribeMessage);
_events.Remove(eventId);
}
}
}
public static Message Create(IFrame frame, string side = "")
{
var messageType = (MessageType)frame.TakeByte();
var clientHostAddress = HostAddress.Read(frame);
switch (messageType)
{
case MessageType.Hello:
return(HelloMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Ack:
return(AckMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Connect:
return(ConnectMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Heartbeat:
return(HeartbeatMessage.ReadInternal(clientHostAddress));
case MessageType.TerminateSession:
return(TerminateMessage.ReadInternal(clientHostAddress));
case MessageType.ErrorMessage:
return(ErrorMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Exception:
return(ExceptionMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Event:
return(EventMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Request:
return(RequestMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Response:
return(ResponseMessage.ReadInternal(clientHostAddress, frame));
case MessageType.SubscribeEvent:
return(SubscribeEventMessage.ReadInternal(clientHostAddress, frame));
case MessageType.UnsubscribeEvent:
return(UnsubscribeEventMessage.ReadInternal(clientHostAddress, frame));
case MessageType.Notification:
return(NotificationMessage.ReadInternal(clientHostAddress, frame));
default:
throw new IOException(
$"Unknown Message type {messageType} is received");
}
}
protected virtual Task <IResponseMessage> HandleUnsubscribeEvent(UnsubscribeEventMessage request)
{
return(DefaultResponse());
}