[rules-users] [Planner][DRL] Changable problem facts?

Hello! I am working on task scheduling system. My system works fine, but I want to make it faster. For my current problem we can assume that my domain consists of: * Worker (int id, List<TimePeriod> workingHours) * TaskAssignment (int id, List<TimePeriod> possibleExecutionTime, Duration leadTime, Worker worker) I am trying to assing each Task Assignment to 1 worker. It's obvious. All I need to do is to make my rules computing faster. For example I have a rule: rule "ASSIGN_OUT_OF_WORKING_TIME" when $w : Worker($id : id != 0, $wh : workingHours) $ta : TaskAssignment(worker != null, worker.id == $id) not TimePeriod( isBetweenInclusive($ta.getTimeSlot()), isBetweenInclusive($ta.getEndTimeSlot()) ) from $wh then insertLogical(new IntConstraintOccurrence("ASSIGN_OUT_OF_WORKING_TIME", ConstraintType.NEGATIVE_HARD, 100, $w )); end This rule checks if every TaskAssignment assigned to a Worker lies in the worker's working hours. The problem is that score calculator is trying to pair given Worker with every TaskAssignment. So I have to make set of TaskAssignment as small as possible. I can acquire that by storing in a Worker any kind of Set including all assigned TaskAssignments. After this my domain should looks like this: * Worker (int id, List<TimePeriod> workingHours, Set<TaskAssignment> cashedTaskAssignments) * TaskAssignment (int id, List<TimePeriod> possibleExecutionTime, Duration leadTime, Worker worker) and my rule: rule "ASSIGN_OUT_OF_WORKING_TIME" when $w : Worker($id : id != 0, $wh : workingHours, *$cta : cachedTaskAssignments*) $ta : TaskAssignment() *from $cta* not TimePeriod( isBetweenInclusive($ta.getTimeSlot()), isBetweenInclusive($ta.getEndTimeSlot()) ) from $wh then insertLogical(new IntConstraintOccurrence("ASSIGN_OUT_OF_WORKING_TIME", ConstraintType.NEGATIVE_HARD, ASSIGN_OUT_OF_WORKING_TIME, $w )); end My cloneSolution() method is cloning everything right (deep clone of every TaskAssignment and Worker). I've checked it via many tests. Anyways I'm getting: *Score corruption: the workingScore (-1800hard/0soft) is not the uncorruptedScore (-1904hard/0soft):* or similar error. To sum up: * my system works fine without any changes in Worker class * I want to make it faster by caching assigned TaskAssignments in a Worker objects * I'm getting 'Score corruption' error Is my idea possible to play out? -- View this message in context: http://drools.46999.n3.nabble.com/Planner-DRL-Changable-problem-facts-tp4... Sent from the Drools: User forum mailing list archive at Nabble.com.