org.openhab.core.items.Item not working in 3.1

Setup, Configuration and Use Migration
1

Hello,
i tried to switch from OH 2.7 to 3.1 and habe a lot of troubles with bindings and self created things and items

I get follow error message when i try to find an item by name or state:

Script execution of rule with UID ‘my-1’ failed: cannot invoke method public abstract java.lang.String org.openhab.core.items.Item.getName() on null in my

I use the my.items file for creating items but i have to use channel items which are created on the gui.

How can i catch the triggeringItem by name or state?

Here’s some code details:

Thing and channels:

UID: http:url:PowerStrip1
label: PowerStrip1
thingTypeUID: http:url
configuration:
  authMode: BASIC
  ignoreSSLErrors: true
  baseURL: http://192.168.22.81/?cmd=511
  delay: 0
  stateMethod: GET
  refresh: 5
  commandMethod: GET
  contentType: application/json
  timeout: 3000
  bufferSize: 2048
channels:
  - id: PowerStrip_1_Socket_1_Status
    channelTypeUID: http:number
    label: PowerStrip_1_Socket_1_Status
    description: null
    configuration:
      mode: READONLY
      stateTransformation: JSONPATH:$.data.switch[0]
  - id: PowerStrip_1_Socket_1_Watt_Org
    channelTypeUID: http:number
    label: PowerStrip_1_Socket_1_Watt_Org
    description: null
    configuration:
      mode: READONLY
      stateTransformation: JSONPATH:$.data.watt[0]

Items:

PowerStrip1_Socket_1_Status
String . Point
PowerStrip1_Socket_1_Status

PowerStrip_1_Socket_1_Watt_Org
Number . Point
PowerStrip_1_Socket_1_Watt_Org

Items in my.items:

Number PowerStrip_1_Socket_1_Watt “Verbrauch1_1”
Switch PowerStrip_1_Socket_1 “Steckdose1_1” (Steckdosen)

my.rules:

rule "PowerStrip_Switch"
    when
	Item PowerStrip_1_Socket_1 received command or
   	Item PowerStrip_1_Socket_2 received command
    then     
	val strip = triggeringItem.name.split("_").get(1) 
   	val ip = transform("MAP", "steckdose.map", strip)
	val port = triggeringItem.name.split("_").get(3)
	val cmd = if(receivedCommand == ON) "1" else "0"
    	val encoded = URLEncoder::encode('{"port":'+port+', "state":'+cmd+'}', 'UTF-8')
	sendHttpGetRequest("http://"+ip+"/?cmd=200&json="+encoded)
	logWarn("Steckdose", "Steckdose " + strip + " Port" +  port  + "umgeschaltet auf: " + cmd )

end

rule "PowerStripWatt"
	when
		Item PowerStrip_1_Socket_1_Watt_Org changed or
		Item PowerStrip_1_Socket_2_Watt_Org changed
	then
	val watt = (triggeringItem.state as Number)/1000
	//val java.text.DecimalFormat df = new java.text.DecimalFormat("#.#")
	//val Number watt = Double.valueOf(df.format((triggeringItem.state as Number)/1000))
	
	val gItemName2 = triggeringItem.name.replace("_Org","")
	//logWarn("Wattänderung.test", triggeringItem.name.toString()  )
	//logWarn("Wattänderung.test", gItemName2  )
    if(triggeringItem.state == "0")
	{
	postUpdate(gItemName2,0)
	}
	else
	{
	val CompleteWatt = String::format("%.1f", watt)
	 postUpdate(gItemName2,CompleteWatt)
	}
	
	
end

and error messages:

2021-07-04 11:23:56.086 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID ‘my-1’ failed: cannot invoke method public abstract java.lang.String org.openhab.core.items.Item.getName() on null in my

2021-07-04 11:24:15.431 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID ‘my-6’ failed: cannot invoke method public abstract org.openhab.core.types.State org.openhab.core.items.Item.getState() on null in my

2

triggeringItem has changed in OH3.

In OH2,it was generally available.
In OH3, it is only available if you trigger from ‘Member of’

However a new implicit variable triggeringItemName is available

1 Like
3

Thanks for help. now this scripts are running fine again.

4

So, this means any logic also must be a Member Of:

rule "lampsCtrl"
when 
    Member of gOutWeather changed
    or 
    Item localCurrentTemperature changed
then

if gOutWeather triggered, triggeringItem would be set.
If localCurrentTemperature triggered, triggeringItem is null, or otherwise unusable.

Do I have this right?