Probably wrong data types in rule

Setup, Configuration and Use Scripts & Rules
1

Dear all

For a long time I’m trying again to implement a new rule. However I miserably fail. I guess I mess up with the data types (e.g. long, int etc). In any case the below rule (not the full rule but the part which does not work, in case you ask yourself what I want to achieve with it) does not work:

var long LastUpdate  = now.toInstant.toEpochMilli
var Time_low = 0
var Count = 0
val P_Warme = 3000
val Hysterese_P = 300
val Hysterese_T = 5
val Delta =  -(32.77-31.15)/(31.15-22.4)/(1+(32.77-31.15)/(31.15-22.4))

rule "Steuerung"
when 
	Time cron "0/5 * * * * ? *" 
then
val currentTime = now.toInstant.toEpochMilli
val timeElapsed = (currentTime - LastUpdate)/1000
if (Leistung.state > (Delta * P_Warme + Hysterese_P)){
        if (Count == 0){
                Time_low = timeElapsed +  Time_low
        }
        Count = 0
        Time_high = 0
        if (Time_low > Hysterese_T){
        }  
}
end

I get following errors:

2024-01-21 18:55:29.792 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID 'Steuerung-1' failed: An error occurred during the script execution: Could not invoke method: org.eclipse.xtext.xbase.lib.LongExtensions.operator_plus(long,int) on instance: null in Steuerung
2024-01-21 18:55:35.599 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID 'Steuerung-1' failed: An error occurred during the script execution: Could not invoke method: org.eclipse.xtext.xbase.lib.LongExtensions.operator_minus(long,long) on instance: null in Steuerung
2024-01-21 18:55:35.990 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID 'Steuerung-1' failed: An error occurred during the script execution: Couldn't invoke 'assignValueTo' for feature JvmVoid:  (eProxyURI: Steuerung.rules#|::0.2.0.2.0.2.1.0.2::0::/1) in Steuerung

Sorry to bother, but can anybody help to unmess the rule?

Thanks a lot in advance

2

Leistung.state > (Delta * P_Warme + Hysterese_P)

That probably won’t work. RulesDSL is a pain to work with. You’d need to convert that to Number first.

val leistungState = Leistung.state as Number
if (leistungState > (Delta * P_Warme + Hysterese_P)) {

You’re also missing Time_high.

So try this

var LastUpdate  = now.toInstant.toEpochMilli
var Time_low = 0L // also long
var Time_high = 0L // also long
var Count = 0
val P_Warme = 3000
val Hysterese_P = 300
val Hysterese_T = 5
val Delta =  -(32.77-31.15)/(31.15-22.4)/(1+(32.77-31.15)/(31.15-22.4))

rule "Steuerung"
when 
	Time cron "0/5 * * * * ? *" 
then
val currentTime = now.toInstant.toEpochMilli
val timeElapsed = (currentTime - LastUpdate)/1000
val leistungState = Leistung.state as Number
if (leistungState > (Delta * P_Warme + Hysterese_P)) {
        if (Count == 0){
                Time_low = timeElapsed +  Time_low
        }
        Count = 0
        Time_high = 0
        if (Time_low > Hysterese_T){
        }  
}
end
3

@JimT: thank you very much for your help. I only found time at the weekend to adapt the code and it seems to work.