private Result <DataResponse>[] ReadEvents(Session session, IEventDataResponse eventDataResponse, OpcUAQuery[] opcUAQuery, NamespaceTable namespaceTable)
{
var nodeCache = _nodeCacheFactory.Create(session);
var browsePaths = opcUAQuery.Select(a => ResolveRelativePath(a, namespaceTable)).ToArray();
Result <NodeId>[] nodeIdsResult = GetNodeIds(session, browsePaths, namespaceTable);
var results = new Result <DataResponse> [opcUAQuery.Length];
// Do one by one for now. unsure of use-case with multiple node ids for same filter.
for (int i = 0; i < opcUAQuery.Length; i++)
{
var nodeIdResult = nodeIdsResult[i];
if (nodeIdResult.Success)
{
var query = opcUAQuery[i];
var tr = query.timeRange;
//var nodeId = Converter.GetNodeId(query.nodeId, namespaceTable);
DateTime fromTime = DateTimeOffset.FromUnixTimeMilliseconds(tr.FromEpochMS).UtcDateTime;
DateTime toTime = DateTimeOffset.FromUnixTimeMilliseconds(tr.ToEpochMS).UtcDateTime;
var eventFilter = Converter.GetEventFilter(query, namespaceTable);
var response = session.ReadEvents(fromTime, toTime, uint.MaxValue, eventFilter, new[] { nodeIdResult.Value });
results[i] = eventDataResponse.CreateEventDataResponse(response[0], query, nodeCache);
}
else
{
results[i] = new Result <DataResponse>(nodeIdResult.StatusCode, nodeIdResult.Error);
}
}
return(results);
}
public Result <DataResponse> GetEventData(OpcUAQuery query, NodeId startNodeId, Opc.Ua.EventFilter eventFilter)
{
var nodeCache = _nodeCacheFactory.Create(_session);
eventFilter.AddSelectClause(ObjectTypeIds.BaseEventType, "SourceNode");
eventFilter.AddSelectClause(ObjectTypeIds.BaseEventType, "EventType");
var eventFilterValues = GetEventFilterValues(startNodeId, eventFilter);
if (eventFilterValues == null)
{
var monitorItem = AddMonitorItem(startNodeId, eventFilter);
eventFilterValues = new EventFilterValues(monitorItem, query, eventFilter);
if (!TryAddEventFilterValues(startNodeId, eventFilterValues))
{
RemoveMonitorItem(monitorItem);
eventFilterValues = null;
}
}
lock (_eventData)
{
if (eventFilterValues == null)
{
eventFilterValues = GetEventFilterValues(startNodeId, eventFilter);
}
if (eventFilterValues != null)
{
return(_eventDataResponse.CreateEventSubscriptionDataResponse(eventFilterValues.Values.Values, query, nodeCache));
}
}
return(new Result <DataResponse>(StatusCodes.BadUnexpectedError, ""));
}