/// <summary>
/// Returns id actully used for OPC subscription, always as original id.
/// valueSubscription.Update() is called using сallbackDoer, see Initialize(..).
/// </summary>
/// <param name="elementId"></param>
/// <param name="valueSubscription"></param>
public void AddItem(string?elementId, IValueSubscription valueSubscription)
{
//Logger?.LogDebug("XiDataProvider.AddItem() " + elementId);
if (String.IsNullOrEmpty(elementId))
{
var callbackDispatcher = CallbackDispatcher;
if (callbackDispatcher is not null)
{
try
{
callbackDispatcher.BeginInvoke(ct =>
valueSubscription.Update(new ValueStatusTimestamp {
ValueStatusCode = ValueStatusCode.ItemDoesNotExist
}));
}
catch (Exception)
{
}
}
return;
}
var valueSubscriptionObj = new ValueSubscriptionObj(elementId, valueSubscription);
_valueSubscriptionsCollection.Add(valueSubscription, valueSubscriptionObj);
if (IsInitialized)
{
valueSubscription.MappedElementIdOrConst = AddItem(valueSubscriptionObj);
}
}
/// <summary>
/// If valueSubscription is not subscribed - does nothing.
/// </summary>
/// <param name="valueSubscription"></param>
public void RemoveItem(IValueSubscription valueSubscription)
{
if (!_valueSubscriptionsCollection.Remove(valueSubscription, out ValueSubscriptionObj? valueSubscriptionObj))
{
return;
}
if (IsInitialized)
{
RemoveItem(valueSubscriptionObj);
}
}
/// <summary>
///
/// </summary>
/// <param name="valueSubscription"></param>
/// <param name="valueStatusTimestamp"></param>
/// <param name="userFriendlyLogger"></param>
public void Write(IValueSubscription valueSubscription, ValueStatusTimestamp valueStatusTimestamp, ILogger?userFriendlyLogger)
{
BeginInvoke(ct =>
{
if (_xiServerProxy is null)
{
throw new InvalidOperationException();
}
_xiDataListItemsManager.Subscribe(_xiServerProxy, CallbackDispatcher,
XiDataListItemsManagerOnElementValuesCallback, true, ct);
_xiDataListItemsManager.Write(valueSubscription, valueStatusTimestamp);
});
}
