private void AddSubscription(string queue, EvHandler handler)
{
if (!subscriptions.TryGetValue(queue, out List <EvHandler> handlers))
{
handlers = new List <EvHandler>();
subscriptions[queue] = handlers;
}
handlers.Add(handler);
}
//--------------------------------------------------------------------------------------------------------------------------------------
#endregion
#region Functions
#region Private Functions
//--------------------------------------------------------------------------------------------------------------------------------------
static void __exec <T>(object sender, T ev, EvInfo evInfo, EvHandler evhandle)
{
//use Dynamic callback if derived type; use known type otherwise
if (evInfo.IsDerivedMatch)
{
((dynamic)evhandle.Cb)(sender, evInfo, ev);
}
else
{
((EventCb <T>)evhandle.Cb)(sender, evInfo, ev);
}
}
public void Unsubscribe(string ev, EvHandler handler)
{
lock (lockObj)
{
var q = queue.GetQueue(ev);
if (RemoveSubscription(ev, handler) == 0)
{
q.DetachReceiver();
q.EventReceivedHandler = null;
}
}
}
public void Subscribe(string queueName, EvHandler handler)
{
lock (lockObj)
{
var q = queue.GetQueue(queueName);
if (GetSubCountForQueue(queueName) == 0)
{
q.AttachReceiver();
q.EventReceivedHandler = Queue_EventReceived;
}
AddSubscription(queueName, handler);
}
}
/// <summary>
/// removes handler from queue and returns count of remaining handlers for said queue
/// </summary>
/// <param name="queue"></param>
/// <param name="handler"></param>
/// <returns></returns>
private int RemoveSubscription(string queue, EvHandler handler)
{
if (subscriptions.TryGetValue(queue, out List <EvHandler> handlers))
{
handlers.Remove(handler);
if (handlers.Count == 0)
{
subscriptions.Remove(queue);
}
return(handlers.Count);
}
return(0);
}
