Assuming that the engine is handling one set of facts at a time, I would
use a single additional fact to collect all decisions. The details of this object
may vary (depending on whether you have a constant number of rules or
not).

enum Decision { UNDEF, GRANTED, DEFERRED,... }
class Collector {
    Decision decision = Decision.UNDEF;
    Set<String> rules;
   //...
}

Here is a sample rule:

rule "rule1"
when
    $d : Decision( rules not contains "rule1" )
     ....
then
   modify( $d ){
      addRule( "rule1" ),
      setDecision( maximumOf( $d.getDecision(), Decision.XYZ ) )
   }
end

At the end, the decision object contains the final decision.

-W

On 5 August 2010 07:34, bbarani <bbarani@gmail.com> wrote:

Hi,

We have multiple rules defined in Guvnor and we fire all the rules at a
time. There is a decision object set for each rule and I am trying to figure
out a way to aggregate the result using the prirority of the decision object
(kind of logical AND / OR)

For Ex: The priority of the decision would be set as below

Priority:

Priority3              Priority2                    Priority1     Exception on any rule
Granted   Action not Supported  Denied          Deferred

After the rules are fired (I am considering 4 rules here) the final decision
should be as follows

Sample Rule result:

Rule    Rule1   Rule2   Rule3                                Rule4
FinalDecison
Decisions       Granted Granted Granted                            Deferred
Deferred
       Granted Granted Action Not Supported      Granted                       Action Not
Supported
       Granted Granted Denied                             Granted
Denied
       Granted Granted Granted                             Granted
Granted


Is there a way to acheive this using rule flow group / any other simple way?

Thanks,
Barani





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