/// <summary>
/// Removes listener for events.
/// </summary>
/// <param name="listener">Listener the event listener.</param>
/// <exception cref="ArgumentNullException">If <paramref name="listener"/> is null.</exception>
public void RemoveEventListener(IDXFeedEventListener <E> listener)
{
if (listener == null)
{
throw new ArgumentNullException();
}
lock (eventListenerLocker)
{
eventListeners.Remove(listener);
}
}
/// <summary>
/// Adds listener for events.
/// Newly added listeners start receiving only new events.
/// This method does nothing if this subscription is <see cref="IsClosed"/>.
/// </summary>
/// <param name="listener">The event listener.</param>
/// <exception cref="ArgumentNullException">If <paramref name="listener"/> is null.</exception>
public void AddEventListener(IDXFeedEventListener <E> listener)
{
if (listener == null)
{
throw new ArgumentNullException();
}
if (IsClosed)
{
return;
}
lock (eventListenerLocker)
{
if (!eventListeners.Contains(listener))
{
eventListeners.Add(listener);
}
}
}
