public async Task AsyncTask_updateinfo()
{
IList <PIPointChangeInfo> clist = new List <PIPointChangeInfo>();
Action asyncJobupdateinfo = () =>
{
PIPointChangesCookie cookie = null;
while (updateval2 == 0)
{
if (myPIServer != null)
{
if (monitval == 0)
{
monitval = 1;
cookie = null;
UpdMonitorLabel("Monitoring ON (" + myPIServer.Name + ")");
}
if (ReferenceEquals(cookie, null))
{
clist = myPIServer.FindChangedPIPoints(int.MaxValue, null, out cookie);
}
else
{
clist = myPIServer.FindChangedPIPoints(int.MaxValue, cookie, out cookie);
}
if (clist != null)
{
foreach (PIPointChangeInfo change in clist)
{
//MessageBox.Show(change.ID + " : " + change.Action);
string[] displayvalues = new string[3];
if (change.Action.ToString() == "Removed")
{
displayvalues[0] = change.ID.ToString();
}
else
{
PIPoint mypt = PIPoint.FindPIPoint(myPIServer, change.ID);
displayvalues[0] = mypt.Name;
}
displayvalues[1] = change.Action.ToString();
displayvalues[2] = DateTime.Now.ToString();
ListViewItem lvi = new ListViewItem(displayvalues);
UpdListView2(lvi);
}
}
}
}
};
await Task.Run(asyncJobupdateinfo);
}
public void PointUpdatesTest()
{
// Construct a unique PI Point name
string pointNameFormat = $"PointUpdateTestPoint{AFTime.Now}";
// Expected number of changes
const int ExpectedChangeCount = 3;
var nameOfPointToDelete = pointNameFormat;
Utils.CheckTimeDrift(Fixture, Output);
PIPointChangesCookie cookie = null;
try
{
// Initialize to start monitoring changes
Output.WriteLine($"Prepare to receive PI Point change notifications.");
Fixture.PIServer.FindChangedPIPoints(int.MaxValue, null, out cookie);
// Perform the operation 10 times...
Output.WriteLine($"Create PI Points and process change notifications.");
for (int loopIndex = 0; loopIndex < 10; loopIndex++)
{
// Create a new PI Point which should cause a change (#1)
PIPoint testPoint = Fixture.PIServer.CreatePIPoint(pointNameFormat);
nameOfPointToDelete = pointNameFormat;
// Edit the PI Point's name to cause a change (#2)
testPoint.Name = string.Concat(testPoint.Name, "_Renamed");
nameOfPointToDelete = testPoint.Name;
// Delete the PI Point which should cause a change (#3)
Fixture.PIServer.DeletePIPoint(testPoint.Name);
// Sleep a bit to make sure all processing has completed
Thread.Sleep(TimeSpan.FromSeconds(3));
// Log changes that have occurred since the last call
var changes = Fixture.PIServer.FindChangedPIPoints(
int.MaxValue, cookie, out cookie, new PIPointList()
{
testPoint
});
if (changes != null)
{
foreach (var info in changes)
{
Output.WriteLine($"Change [{info.Action}] made on point with ID [{info.ID}].");
Assert.True(testPoint.ID == info.ID, $"Expected change on point with ID: [{testPoint.ID}], Actual change point ID: [{info.ID}].");
}
Assert.True(changes.Count == ExpectedChangeCount,
$"Expected the number of change to be {ExpectedChangeCount}, but there were actually {changes.Count} on iteration {loopIndex + 1}.");
}
}
Output.WriteLine("Retrieved PI Point change notifications successfully.");
}
finally
{
Fixture.DeletePIPoints($"{pointNameFormat}*", Output);
Fixture.DeletePIPoints($"{nameOfPointToDelete}*", Output);
cookie?.Dispose();
}
}
