[SOLVED] How to read Drools memory in order to detect partially matched rules

How to read Drools memory in order to detect partially matched rules

I'd like to be able to read Drools memory in such a way that I can detect which condition has matched, even though the rule didn't fire in the end.

Say I have this rule:

rule "MyRule"
when
   FirstFact(condition == "str")
   SecondFast(anotherCondition > 30)
then
...
end

If I insert only an object "FirstFact" in memory and I call fireAllRules(), the rule will not be fired. But still, I'd like to track down that the first condition of this rule matched.

I understand this is a weird requirement, and it may take some time to develop as it would probably not be straightforward but if there's a way to do it I'm interested.

I was thinking of accessing Drools memory and visit all conditions contained in the Rete tree, but I am not sure if it's a good approach or even possible.

Thanks !

Solution

Because of the way RETE works, what you are trying to do is not possible. Please read this other Question to get and idea of a possible solution: Drools 7, event listener to whenever a rule is activated (even if partially matched)

Hope it helps,