public IDisposable Subscribe <T>(IHandle <T> handler) where T : Message
{
Ensure.NotNull(handler, "handler");
lock (_handlers)
{
int[] descendants = MessageHierarchy.DescendantsByType[typeof(T)];
for (int i = 0; i < descendants.Length; ++i)
{
var handlers = _handlers[descendants[i]];
if (!handlers.Any(x => x.IsSame <T>(handler)))
{
handlers.Add(new MessageHandler <T>(handler, handler.GetType().Name,
MessageHierarchy.GetMsgTypeId(typeof(T))));
}
}
return(new SubscriptionDisposer(() => { this?.Unsubscribe(handler); return Unit.Default; }));
}
}
public bool HasSubscriberFor <T>(bool includeDerived = false) where T : Message
{
return(HasSubscriberFor(MessageHierarchy.GetMsgTypeId(typeof(T)), includeDerived));
}