[rules-users] Adding eval on rule cause it to run in infinite loop

[Wolfgang Laun]

On 11/06/2014, brachi <brachi.w at sapiens.com> wrote:
> example of rule that doesn't work without eval:
>
> /*    rule "1"
>     salience -1
>     agenda-group "agenda1"
>     when
>         $conclusion: supportFT()

Where's the eval?


>     then
> 		if($conclusion.getValue()==null){
> 			modify($conclusion) { setValue(new ArrayList())};
> 		}
> 		$conclusion.getValue().add("supportedValue");
>                 modify($conclusion) { setValue($conclusion.getValue()) };

You might use a simple update() here.

>      end
>
>
>     rule "2"
>     salience -2
>     agenda-group "agenda2"
>     when
>         supportFT(Operators.containsAny(value,new
> String[]{"supportedValue","otherValue"}))

This can be written using the clearer and cleaner syntax

          supportFT( value in ("supportedValue","otherValue") )

> 		$conclusion: ConclusionFt()

Moreover, this should contain the constraint

               $conclusion: ConclusionFt( value != "success" )

>     then
> 		modify($conclusion){setValue("success")};

Here, ConclusionFt's attribute value is a simple String, but in that
other rule it is set to an ArrayList.

-W

>     end*/
>
> rule "2" doesn't hit, works only with eval in rule "2".
> in this example I can add eval, because the Fact Types model is different,
> so the rule doesn't reevaluated.
> because I had this case, I decided to add eval for all constraints, but
> unfortunately I had an infinite loop.
>
>
>
>
> --
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