Sensor Monitor - GetItem(FQID fqid) method Event Server calls

MIP
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1

Hello, I was looking at the Sensor Monitor plugin and modified the GetItem(FQID fqid) method to add a log, because I was interested in when this was called, since I figured this method was important to have items on the maps.

The modified GetItem is as follows:

public override Item GetItem(FQID fqid)
{
	EnvironmentManager.Instance.Log(false, "Sensor Monitor Sample", $"Getting Controller with FQID: {fqid.ObjectId}");
	Item item = Configuration.Instance.GetItemConfiguration(SensorMonitorDefinition.SensorMonitorPluginId, _kind, fqid.ObjectId);
	if (item == null)
			return null;
	return new ControllerItem(item);
}

What I noticed was that there are several calls being made to the Event Server when I have a Smart Client open.

The calls are basically the same, but keep repeating between Controller and Sensor items, over and over.

2024-07-01 11:35:49.739+01:00 [    60] INFO       - Sensor Monitor Sample  Getting Controller with FQID: 6ad0eb21-bf67-400b-b4b2-90764d0a92be
2024-07-01 11:35:49.739+01:00 [    60] INFO       - Sensor Monitor Sample  Getting Sensor with FQID: 2ad9ebac-00a2-4561-93d0-a44f124a7feb
2024-07-01 11:35:49.739+01:00 [    60] INFO       - Sensor Monitor Sample  Getting Controller with FQID: 61e43569-5ef7-461b-a9d5-b578d2fd3d92
2024-07-01 11:35:49.739+01:00 [    60] INFO       - Sensor Monitor Sample  Getting Sensor with FQID: 1b590499-12c5-4562-bf37-b461fcfca4a6
2024-07-01 11:35:49.739+01:00 [    60] INFO       - Sensor Monitor Sample  Getting Controller with FQID: 6ad0eb21-bf67-400b-b4b2-90764d0a92be

I’m just asking since I wonder if this amount of calls can have an impact on the AppDomain memory, if I have a large amount of items created (hundreds of sensors and controllers created).

Is this normal behaviour or is there a better to get items on the map?

I’m using a 2023 R3 Professional+ version to test this.

Thanks.

2

Hi Guillaume,

That is an intended behavior. The Map ( legacy Map, not Smart Map) uses a polling model to get data and updates for items and devices on the map. It does a few calls. It’s not great, but this is how it’s always been.

3

Hi Rie,

Thank you for the answer.

Indeed it is not optimal, but if it is limited to the legacy Map it is understandable.

I will check Smart Map behavior since I didn’t test on it.