private void MonitorAFAttributes()
{
DataPipeHandler afDataPipeHandler = null;
try
{
//connect to AF Server
if (string.IsNullOrEmpty(AFServerName))
{
throw new AFServerNotFoundException();
}
else
{
AFDatabase database;
var _afConnectionManager = AfConnectionHelper.ConnectAndGetDatabase(AFServerName, AFDatabaseName,
out database);
// get the attributes that will be monitored
IDictionary <string, string> findAttributesErrors;
var attributes = AFAttribute.FindAttributesByPath(AttributesList, database, out findAttributesErrors);
// in case there was errors in the search we display them
if (findAttributesErrors != null && findAttributesErrors.Count > 0)
{
findAttributesErrors.ToList().ForEach(e => Logger.ErrorFormat("{0},{1}", e.Key, e.Value));
}
afDataPipeHandler = new DataPipeHandler(new AFConsoleDataObserver());
afDataPipeHandler.AddSignupsWithInitEvents(attributes);
afDataPipeHandler.StartListening(TimeSpan.FromSeconds(Interval));
Logger.InfoFormat("Listening for data changes started. Checking every {0}s", Interval);
}
}
catch (Exception ex)
{
Logger.Error(ex);
}
finally
{
_terminateRequest.WaitOne();
// null propagation operator, this is same as x!=null x.Dispose()
afDataPipeHandler?.Dispose();
}
}
public void GetPIData(string[] paths, string startTime, string endTime, string interval)
{
string[] correctPaths = paths.Select(m => m.Substring(3)).ToArray();
AFKeyedResults <string, AFAttribute> results = AFAttribute.FindAttributesByPath(correctPaths, null);
AFAttributeList attributeList = new AFAttributeList();
foreach (AFAttribute attribute in results)
{
attributeList.Add(attribute);
}
AFTime start = new AFTime(startTime);
AFTime end = new AFTime(endTime);
AFTimeRange timeRange = new AFTimeRange(start, end);
AFTimeSpan timeSpan = AFTimeSpan.Parse(interval);
IEnumerable <AFValues> valueResults = attributeList.Data.InterpolatedValues(timeRange, timeSpan, string.Empty, false, new PIPagingConfiguration(PIPageType.TagCount, 100));
piValuesList = new PIValuesList(valueResults);
}
public void Run()
{
string processFeedRate = @"\\<AFSERVER>\NuGreen\NuGreen\Houston\Cracking Process\Equipment\B-210|Process Feedrate";
string waterFlow = @"\\<AFSERVER>\NuGreen\NuGreen\Houston\Cracking Process\Equipment\B-210|Water Flow";
// Directly locate the AFAttribute of interest by passing in the AF path.
// A similar method FindElementsByPath can be used to directly locate elements.
AFKeyedResults <string, AFAttribute> results = AFAttribute.FindAttributesByPath(new[] { processFeedRate, waterFlow }, null);
AFAttribute processFeedRateAttribute = results[processFeedRate];
AFAttribute waterFlowAttribute = results[waterFlow];
AFAttributeList attrList = new AFAttributeList(new[] { processFeedRateAttribute, waterFlowAttribute });
// Make a bulk call to get values.
AFValues values = attrList.GetValue();
foreach (AFValue val in values)
{
Console.WriteLine("Attribute: {0}", val.Attribute);
Console.WriteLine("Timestamp: {0}, Value: {1}", val.Timestamp, val.Value.ToString());
Console.WriteLine();
}
}
