JSR233 Jython, on Group change [resolved]

[Egon_Dadalt]

Hello, i’m trying use a GenericEventTrigger to trigger my rule when a member of group have a change.

I readed the documentation, but cant configure this. I need a help.

I’m using OH 3 and Jython to make the rule.

This work for change of one item:

sRule = RuleVerificaAlarme()
sRule.setTriggers([
    TriggerBuilder.create()
        .withId("RuleChangeTeste")
        .withTypeUID("core.ItemStateChangeTrigger")
        .withConfiguration(
            Configuration({
                "itemName": "Loft_Light"
            })).build()
    ])

automationManager.addRule(sRule)

I tried use this:

sRule2 = RuleVerificaAlarme()

sRule2.setTriggers([
    TriggerBuilder.create()
        .withId("RuleChangeTeste2")
        .withTypeUID("core.GenericEventTrigger")
        .withConfiguration(
            Configuration({
                "eventSource": "GF_Alarme_Sensores",
                "eventTypes": "GroupItemStateChangedEvent"
            })).build()
    ])
   automationManager.addRule(sRule2)

But not work.

My group is GF_Alarme_Sensores.

In DSL i use

rule "Rule 1.01"
when
    Member of GF_Alarme_Sensores changed
then
......

[CrazyIvan359 (Michael Murton)]

You’ll have to give us more information that “but not work”. What is the error it gives? Is there information in the logs?

Also this is the hard way to write rules in Jython, have you had a look at the Helper Libraries? They already have working triggers for both of the examples you have given. For OH3 you will need to follow the Manual Installation instructions (skip the part about modifying EXTRA_JAVA_OPTS and install the Python automation add-on instead of the NGRE one) and you will need to use the code in PR #376 which has been updated for OH3.

[rossko57]

@Egon_Dadalt

trigger my rule when a member of group have a change

Note that this is not the same as triggering from change to the Group state itself. A member may change and have no effect on parent Group state at all.
You want the equivalent of the Member of trigger in your old DSL rule, not any Group event.

How to find out which group item caused a "group rule" to trigger

triggeringItem only exists in the DSL, but scripted automation has event.itemName, event.itemState, etc… https://openhab-scripters.github.io/openhab-helper-libraries/Guides/But%20How%20Do%20I.html#get-the-triggering-item-s-name. Don’t trigger the rule when the group is updated (groups don’t receive updates)… use a “Member of” trigger instead. I also combined both rules into one… from core.rules import rule from core.triggers import when @rule("Turn ON/OFF the home cinema", description="Turn …

Design Pattern: Working with Groups in Rules

Please see Design Pattern: What is a Design Pattern and How Do I Use Them for how to read and use DPs. Problem Statement Often one finds a number of Rules that are very similar and that all work on similar Items resulting in a lot of duplicated code. One way to solve this problem is through the use of Groups. Concept [image] This DP is not a standard DP in that it provides a single concrete template to follow to solve a specific problem. Instead this DP is more of a grand exploration of some …

[Egon_Dadalt]

Thanks for the reply.

I will try install the Helper Libraries.