/// <summary>
/// No throw. Returns null or changed clientObjs (not null, but possibly zero-lenghth).
/// </summary>
public object[]? PollChanges()
{
if (DataGrpcList is null || DataGrpcList.Disposed)
{
return(null);
}
try
{
var changedClientObjs = new List <object>();
ClientElementValueListItem[] changedClientElementValueListItems = DataGrpcList.PollElementValuesChanges();
foreach (ClientElementValueListItem dataGrpcElementValueListItem in changedClientElementValueListItems)
{
var o = dataGrpcElementValueListItem.Obj as DataGrpcListItemWrapper;
if (o is null)
{
throw new InvalidOperationException();
}
foreach (var modelItem in o.ClientObjectInfosCollection)
{
if (modelItem.ClientObj is not null)
{
changedClientObjs.Add(modelItem.ClientObj);
}
}
}
return(changedClientObjs.ToArray());
}
catch
{
}
return(null);
}
/// <summary>
/// Returns whether connection errors occur.
/// </summary>
/// <returns></returns>
protected bool SubscribeInitial()
{
bool connectionError = false;
foreach (ClientObjectInfo clientObjectInfo in _clientObjectInfosDictionary.Values)
{
if (clientObjectInfo.DataGrpcListItemWrapper is null)
{
var elementId = clientObjectInfo.ElementId;
DataGrpcListItemWrapper?dataGrpcListItemWrapper;
if (!_dataGrpcListItemWrappersDictionary.TryGetValue(elementId, out dataGrpcListItemWrapper))
{
dataGrpcListItemWrapper = new DataGrpcListItemWrapper();
_dataGrpcListItemWrappersDictionary.Add(elementId, dataGrpcListItemWrapper);
}
clientObjectInfo.ForceNotifyClientObj = true;
clientObjectInfo.DataGrpcListItemWrapper = dataGrpcListItemWrapper;
dataGrpcListItemWrapper.ClientObjectInfosCollection.Add(clientObjectInfo);
}
}
var dataGrpcListItemWrappersToAdd = new List <DataGrpcListItemWrapper>();
foreach (var kvp in _dataGrpcListItemWrappersDictionary)
{
DataGrpcListItemWrapper dataGrpcListItemWrapper = kvp.Value;
if (dataGrpcListItemWrapper.DataGrpcListItem is null && !dataGrpcListItemWrapper.ItemDoesNotExist)
{
dataGrpcListItemWrappersToAdd.Add(dataGrpcListItemWrapper);
TDataGrpcListItem?dataGrpcListItem = null;
if (DataGrpcList is not null && !DataGrpcList.Disposed)
{
try
{
dataGrpcListItem = DataGrpcList.PrepareAddItem(kvp.Key);
}
catch
{
connectionError = true;
}
}
/// <summary>
///
/// </summary>
/// <param name="clientObj"></param>
/// <param name="valueStatusTimestamp"></param>
public void Write(object clientObj, ValueStatusTimestamp valueStatusTimestamp)
{
if (DataGrpcList is null || DataGrpcList.Disposed)
{
return;
}
ClientObjectInfo?modelItem;
if (!ModelItemsDictionary.TryGetValue(clientObj, out modelItem))
{
return;
}
if (modelItem.DataGrpcListItemWrapper is null || modelItem.DataGrpcListItemWrapper.DataGrpcListItem is null || modelItem.DataGrpcListItemWrapper.DataGrpcListItem.StatusCode != StatusCode.OK)
{
return;
}
ClientElementValueListItem dataGrpcElementValueListItem = modelItem.DataGrpcListItemWrapper.DataGrpcListItem;
try
{
dataGrpcElementValueListItem.PrepareForWrite(valueStatusTimestamp);
try
{
DataGrpcList.CommitWriteElementValueListItems();
}
catch
{
}
}
catch (Exception ex)
{
Logger.LogWarning(ex, "DataGrpcList.CommitWriteElementValueListItems() exception");
}
}
/// <summary>
/// Creates List, adds/removes items.
/// No throw.
/// </summary>
/// <param name="clientConnectionManager"></param>
/// <param name="сallbackDispatcher"></param>
/// <param name="elementValuesCallbackEventHandler"></param>
/// <param name="callbackIsEnabled"></param>
/// <param name="ct"></param>
public void Subscribe(ClientConnectionManager clientConnectionManager, IDispatcher?сallbackDispatcher,
ElementValuesCallbackEventHandler elementValuesCallbackEventHandler, bool callbackIsEnabled, CancellationToken ct)
{
try
{
if (ct.IsCancellationRequested)
{
return;
}
if (!DataGrpcItemsMustBeAddedOrRemoved)
{
return;
}
bool firstTimeDataConnection = (DataGrpcList is null);
if (firstTimeDataConnection)
{
try
{
if (clientConnectionManager.ConnectionExists)
{
DataGrpcList = clientConnectionManager.NewElementValueList(null);
}
}
catch (Exception)
{
}
}
bool connectionError = SubscribeInitial();
try
{
if (!connectionError && DataGrpcList is not null && !DataGrpcList.Disposed)
{
if (firstTimeDataConnection)
{
DataGrpcList.ElementValuesCallback +=
(ClientElementValueList dataList, ClientElementValueListItem[] items,
ValueStatusTimestamp[] values) =>
{
var changedClientObjs = new List <object>(items.Length);
var changedValues = new List <ValueStatusTimestamp>(items.Length);
int i = 0;
foreach (ClientElementValueListItem dataGrpcElementValueListItem in items)
{
var o = dataGrpcElementValueListItem.Obj as DataGrpcListItemWrapper;
if (o is null)
{
throw new InvalidOperationException();
}
foreach (var modelItem in o.ClientObjectInfosCollection)
{
modelItem.ForceNotifyClientObj = false;
if (modelItem.ClientObj is not null)
{
changedClientObjs.Add(modelItem.ClientObj);
changedValues.Add(values[i]);
}
}
i++;
}
if (ct.IsCancellationRequested)
{
return;
}
Logger.LogDebug("DataGrpcList.ElementValuesCallback");
if (сallbackDispatcher is not null)
{
try
{
сallbackDispatcher.BeginInvoke(ct =>
{
Logger.LogDebug("DataGrpcList.ElementValuesCallback dispatched");
elementValuesCallbackEventHandler(changedClientObjs.ToArray(), changedValues.ToArray());
});
}
catch (Exception)
{
}
}
};
if (callbackIsEnabled)
{
DataGrpcList.EnableListCallback(true);
}
}
}
}
catch (Exception ex)
{
Logger.LogWarning(ex, "ClientElementValueListItemsManager.Subscribe exception");
connectionError = true;
}
{
var utcNow = DateTime.UtcNow;
var changedClientObjs = new List <object>();
var changedValues = new List <ValueStatusTimestamp>();
foreach (DataGrpcListItemWrapper dataGrpcListItemWrapper in DataGrpcListItemWrappersDictionary.Values)
{
foreach (var modelItem in dataGrpcListItemWrapper.ClientObjectInfosCollection)
{
if (modelItem.ForceNotifyClientObj)
{
modelItem.ForceNotifyClientObj = false;
if (modelItem.ClientObj is not null)
{
if (dataGrpcListItemWrapper.ItemDoesNotExist)
{
changedClientObjs.Add(modelItem.ClientObj);
changedValues.Add(new ValueStatusTimestamp {
ValueStatusCode = ValueStatusCode.ItemDoesNotExist
});
}
else if (dataGrpcListItemWrapper.DataGrpcListItem is not null)
{
changedClientObjs.Add(modelItem.ClientObj);
changedValues.Add(dataGrpcListItemWrapper.DataGrpcListItem.ValueStatusTimestamp);
}
else
{
changedClientObjs.Add(modelItem.ClientObj);
changedValues.Add(new ValueStatusTimestamp(new Any(), ValueStatusCode.Unknown, utcNow));
}
}
}
}
}
if (changedClientObjs.Count > 0)
{
if (ct.IsCancellationRequested)
{
return;
}
if (сallbackDispatcher is not null)
{
try
{
сallbackDispatcher.BeginInvoke(ct =>
elementValuesCallbackEventHandler(changedClientObjs.ToArray(), changedValues.ToArray()));
}
catch (Exception)
{
}
}
}
}
if (!connectionError)
{
DataGrpcItemsMustBeAddedOrRemoved = false;
}
}
finally
{
SubscribeFinal();
}
}
/// <summary>
/// Returns clientObjs whose write failed.
/// If connection error, no throw and returns all clientObjs.
/// </summary>
/// <param name="clientObjs"></param>
/// <param name="valueStatusTimestamps"></param>
/// <returns></returns>
public object[] Write(object[] clientObjs, ValueStatusTimestamp[] valueStatusTimestamps)
{
if (DataGrpcList is null || DataGrpcList.Disposed)
{
return(clientObjs);
}
int i = -1;
var result = new List <object>();
foreach (var clientObj in clientObjs)
{
i++;
ClientObjectInfo?modelItem;
if (!ModelItemsDictionary.TryGetValue(clientObj, out modelItem))
{
result.Add(clientObj);
continue;
}
if (modelItem.DataGrpcListItemWrapper is null ||
modelItem.DataGrpcListItemWrapper.DataGrpcListItem is null ||
modelItem.DataGrpcListItemWrapper.DataGrpcListItem.StatusCode != StatusCode.OK)
{
result.Add(clientObj);
continue;
}
ClientElementValueListItem dataGrpcElementValueListItem = modelItem.DataGrpcListItemWrapper.DataGrpcListItem;
dataGrpcElementValueListItem.PrepareForWrite(valueStatusTimestamps[i]);
}
IEnumerable <ClientElementValueListItem> failedItems;
try
{
failedItems = DataGrpcList.CommitWriteElementValueListItems();
}
catch
{
return(clientObjs);
}
foreach (var dataGrpcElementValueListItem in failedItems)
{
var o = dataGrpcElementValueListItem.Obj as DataGrpcListItemWrapper;
if (o is null)
{
throw new InvalidOperationException();
}
foreach (var modelItem in o.ClientObjectInfosCollection)
{
if (modelItem.ClientObj is not null)
{
result.Add(modelItem.ClientObj);
}
}
}
return(result.ToArray());
}
