Calling Drools Agenda after completion of iteration of Arraylist in DRL file

Question

I am iterating a list in the DRL file. I need to call the new Agenda after completion of the loop. But the following code calls the Agenda "B to C" for all iterations

rule "Difference in offsets"
dialect "java"
lock-on-active
when
    $notification : NotificationVO()
    wtOffset:Integer() from $notification.getWeightOffset();
then
    System.out.println("Hello loop1");
    $notification.getOffsetChngesInterval().
    add((wtOffset-$notification.getInitialOffset()));
    update($notification);
    drools.setFocus("B to C");

rule "Last activity"
   dialect "java"
   salience 2
    no-loop true
    auto-focus false
    agenda-group "B to C"
when
     $notification:NotificationVO
     ($notification.getOffsetChngesInterval()!=null)
then
    System.out.println("Rule2---"+
    $notification.getOffsetChngesInterval().size());
end

In the above code i want to focus the agenda-group "B to C" only after completing the iteration of $notification.getWeightOffset();.

Answer 1

Two comments. (1) The abundant usage of rule attributes is something to be avoided. (2) Rule "Difference in offsets" implements a procedural paradigm: map elements of one list to create another list.

That said, I'd do the calculation of the "changes intervals" on the right hand side of a rule that triggers when there are more "weight offsets" that "changes intervals". (I'm guessing that this is a good condition.)

rule "Difference in offsets"
dialect "java"
when
  $ntf: NotificationVO( weightOffset.size() > offsetChngesInterval.size(),
                        $initOff: initialOffset )
then
  for( Integer ioff: $ntf.getWeightOffset ){
    $ntf.getOffsetChngesInterval().add(ioff - $initOff );
  }
  update( $ntf );
  System.out.println( $ntf.getOffsetChngesInterval().size());
end