/// <summary>
/// Check that instrument profiles update is not empty and call listener.
/// </summary>
/// <param name="listener">Listener to call.</param>
/// <param name="instrumentProfiles">Instrument profiles updates.</param>
private static void CheckAndCallListener(InstrumentProfileUpdateListener listener,
ICollection <InstrumentProfile> instrumentProfiles)
{
if (instrumentProfiles == null || instrumentProfiles.Count == 0)
{
return;
}
listener.InstrumentProfilesUpdated(instrumentProfiles);
}
/// <summary>
/// Removes listener that is notified about any updates in the set of instrument profiles.
/// </summary>
/// <param name="listener">Profile update listener.</param>
/// <exception cref="ArgumentNullException">If listener is null.</exception>
public void RemoveUpdateListener(InstrumentProfileUpdateListener listener)
{
if (listener == null)
{
throw new ArgumentNullException(nameof(listener));
}
lock (listenersLocker)
{
listeners.Remove(listener);
}
}
/// <summary>
/// Adds listener that is notified about any updates in the set of instrument profiles.
/// If a set of instrument profiles is not empty, then this listener is immediately
/// notified right from inside this add method.
/// </summary>
/// <param name="listener">Profile update listener.</param>
/// <exception cref="ArgumentNullException">If listener is null.</exception>
public void AddUpdateListener(InstrumentProfileUpdateListener listener)
{
if (listener == null)
{
throw new ArgumentNullException(nameof(listener));
}
lock (listenersLocker)
{
if (!listeners.Contains(listener))
{
listeners.Add(listener);
}
CheckAndCallListener(listener, updater.InstrumentProfiles);
}
}
