/// <inheritdoc />
public void Listen(XenaTradingWsHandler handler)
{
Validator.NotNull(nameof(handler), handler);
if (Interlocked.CompareExchange(ref _generalHandler, handler, null) != null)
{
throw new DuplicateSubscriptionException("Already subscribed on all messages");
}
}
/// <inheritdoc />
public void Listen <T>(XenaTradingWsHandler <T> handler)
where T : IMessage
{
Validator.NotNull(nameof(handler), handler);
if (!_handlers.TryAdd(typeof(T), handler))
{
throw new DuplicateSubscriptionException($"Already subscribed on {typeof(T).Name} events");
}
}
