public void Subscribe(SubscribeArg arg)
{
var newClientInfo = GetClientInfo();
var callback = OperationContext.Current.GetCallbackChannel <IEventCallback>();
arg.Username = arg.Username.ToLower();
if (!_Subscribers.ContainsKey(arg.Username))
{
_Subscribers[arg.Username] = new SubscribeContext()
{
Arg = arg, Callback = callback, Address = newClientInfo.Item1, Port = newClientInfo.Item2
};
}
else
{
if (_Subscribers[arg.Username].Address != newClientInfo.Item1 || _Subscribers[arg.Username].Port != newClientInfo.Item2)
{
_Subscribers[arg.Username] = new SubscribeContext()
{
Arg = arg, Callback = callback, Address = newClientInfo.Item1, Port = newClientInfo.Item2
};
}
}
ICommunicationObject obj = (ICommunicationObject)callback;
obj.Closed += (sender, args) =>
{
//current client closed, do nothing.
};
obj.Faulted += (sender, args) =>
{
//To do:
//Record error
};
obj.Closing += (sender, args) =>
{
var currentCallback = sender as IEventCallback;
_Subscribers.ToList().ForEach(context =>
{
if (context.Value.Callback == currentCallback)
{
RemoveSubscriber(context.Value.Arg.Username);
ClientLostEvent?.Invoke(arg);
}
});
};
NewClientSubscribedEvent?.Invoke(arg);
}
private void EventService_NewClientSubscribedEvent(SubscribeArg arg)
{
NewClientSubscribed?.Invoke(this, new DataEventArgs(arg.Username));
}
private void EventService_ClientLostEvent(SubscribeArg arg)
{
ClientLost?.Invoke(this, new DataEventArgs(arg.Username));
}