[rules-users] [Planner] CachedMoveFactory drive to Corrupted undo move

[Geoffrey De Smet]

Op 09-11-11 23:31, npiedeloup schreef:
> Hello,
>
> I'm almost new to Drools Planner, and i run into some problems.
> One of them, I really want to understand is that my Planner works well until
> i try to use a CachedMoveFactory instead of my MoveFactory, then i've got
> "Corrupted undo move" at step 2.
>
> Assigment are my PlanningEntity, Day are facts
>
> My MoveFactory is like this :
> 	for (final Assigment assigment: mySolution.getAllAssigments()) {
> 		for (final Day day : mySolution.getAllDays()) {
> 			moveList.add(new PlanMove(assigment, day));
> 		}
> 	}
This is good if the number of assignments and days don't change during 
planning.
> And my doMove is like :
> 	final FactHandle factHandle = workingMemory.getFactHandle(assigment);
> 	assigment.setDay(toDay);
> 	workingMemory.update(factHandle, assigment);
You're only updating the planning entity (assignment) which is a good thing,
as it allows delta score calculation to work efficiently.
Notice that, during planning, you aren't updating the day or any other 
problem fact, which is a good thing.
> The UndoMove is really simple (new PlanMove(assigment, fromDay)) , so I
> pretty sure this part is correct.
>
>
> I have add a false day(future=true) which mean "not plannified yet" and all
> assigment start at this day.
> I have a rule like :
> rule "notPlannified"
>          when
>          	$assigment: Assigment( day.future  )
The "day.future" is unusual. It might be ok, but to exclude it from the 
possible causes, could you:
Add a method "boolean isDayFuture()" on the class Assignment and then do
$assigment: Assigment( dayFuture == true )


>
>          then
>              insertLogical(new IntConstraintOccurrence("notPlannified",
> ConstraintType.NEGATIVE_SOFT, 50, $assigment));
> end
>
> My logs show :
> INFO  Phase construction heuristic finished: step total (0), time spend
> (255), best score (0hard/-18750soft).
> DEBUG     Step index (0), time spend (2175), score (0hard/-18700soft), new
> best score (0hard/-18700soft), accepted move size (1000) for picked step
> ([A148@[UNAFFECT]] ==>  [12/11]).
>
> Someone can explain me what I miss ?
>
> Thanks.
>
> --
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-- 
With kind regards,
Geoffrey De Smet