[rules-users] Drools Planner: Planning variable gets assigned value out of valueRange

[Geoffrey De Smet]

Op 27-11-12 14:16, mr_moe schreef:
> Hey,
>
> I have a planning entity, which has one planning variable called startDate.
> This variable has a defined discrete value range which is a list of numbers
> of the type long. Every number represents a timestamp, which is in between
> the number firstPossibleStartDate and lastPossibleStartDate.
>
> During the planning process, the number 0 is sometimes assigned to the
> planning variable which is definitely not part of the valueRange. I’ve
> printed the list to the console, but all values in the list are fine.
>
> Because every planning entity has its own valueRange, the range is defined
> in the entity itself.
>
> At the moment I’ve implemented my own mover, but the problem occurs also
> with pre-configured mover.
>
> During my research I’ve stumbled upon the following note in the Planner
> Documentation:
> ValueRange from planning entity is currently not yet supported by the new
> MoveSelectors.
> Does this has something to do with my problem?
Yes, this is the one known issue (regression even) with the new selector 
architecture (which has brought many benefits):
It basically breaks @ValueRange(type = 
ValueRangeType.FROM_PLANNING_ENTITY_PROPERTY, ...) currently.
I should probably have failed-fast that for 5.5 if that gets used.

I am hoping to resolve this for 6.0 so FROM_PLANNING_ENTITY_PROPERTY 
does work in the new selector architecture.
To do that properly, I need to put the construction heuristics on the 
new selector architecture first.
>
> Enclosed you will find the code of the planning entity.
>
> @PlanningEntity
> public class DroolTask {
> 	private List<Long> startDateList;
> 	private int id;
> 	private String name;
> 	private long duration;
> 	private long firstPossibleStartDate;
> 	private long lastPossibleStartDate;
> 	private String nextTask = "";
> 	private String previousTask = "";
> 	
> 	// Planning variables: changes during planning, between score calculations.
> 	private long startDate;
> 	
> 	@PlanningVariable
> 	@ValueRange(type = ValueRangeType.FROM_PLANNING_ENTITY_PROPERTY,
> planningEntityProperty = "startDateList")
> 	public long getStartDate(){
> 		return startDate;
> 	}
> 	
> 	public void setStartDate(long startDate){
> 		this.startDate = startDate;
> 	}
> 	
> 	
> 	public List<Long> getStartDateList(){
> 		return this.startDateList;
> 	}
> 	
> 	public void setStartDateList(){
> 		startDateList = getPossibleStartDate();
> 	}
> 	
> 	public List<Long> getPossibleStartDate(){
> 		startDateList = new ArrayList<Long>();
> 		for(long i = firstPossibleStartDate; i<=lastPossibleStartDate; i = i +
> 60){
> 			startDateList.add(i);
> 		}
> 		return startDateList;
> 	}
> 	
> 	public Long getFirstPossibleStartDate(){
> 		return firstPossibleStartDate;
> 	}
> 	
> 	public void setFirstPossibleStartDate(long firstPossibleStartDate){
> 		this.firstPossibleStartDate = firstPossibleStartDate;
> 	}
> 	
> 	public Long getLastPossibleStartDate(){
> 		return lastPossibleStartDate;
> 	}
> 	
> 	public void setLastPossibleStartDate(long lastPossibleEndDate){
> 		this.lastPossibleStartDate = lastPossibleEndDate;
> 	}
> 	
> [...]
>
> 	
> 	public DroolTask clone(){
> 		DroolTask clone = new DroolTask();
> 		
> 		clone.name = name;
> 		clone.duration = duration;
> 		clone.firstPossibleStartDate = firstPossibleStartDate;
> 		clone.lastPossibleStartDate = lastPossibleStartDate;
> 		clone.startDate = startDate;
> 		clone.nextTask = nextTask;
> 		clone.previousTask = previousTask;
> 		clone.startDateList = startDateList;
> 		
> 		return clone;
> 	}
>
> [...]
> }
>
> It would be great, if someone could give me a hint.
> Many thanks,
>
> Moe
>
>
>
> --
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>
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