[rules-users] Optaplanner - Issue with real-time, chained and shadow variables

[Juan Ignacio Barisich]

Geoffrey, thanks for response.
The the Customer "toRemove" instance IS the same instance as which is in
the workingSolution's Customer list. In fact, in the test example I have
attached, I get that instance via:

final Customer toRemove = workingSolution.getCustomerList().get(0);

I try to reproduce the hack in CloudBalancing's problemFactChange
implementation, but with no success. I mean, I tried:

   // to clean the next variable of previous in the chain
   Standstill prev = toRemove.getPreviousStandstill();
   scoreDirector.beforeEntityRemoved(prev);
   prev.setNextCustomer(null);
   scoreDirector.afterEntityRemoved(prev);

but this throw an exception like:
java.lang.IllegalStateException: The entity (1(after 66)) has a variable
(previousStandstill) with value (66(after 51)) which has a mappedBy
variable (nextCustomer) with a value (null) which is not that entity.

Also, i try to clean the previous variable of the following item in the
chain:

   // to clean the previous variable of the following customer in the chain
   Customer nextCustomer = toRemove.getNextCustomer();
   if (nextCustomer != null) {
      scoreDirector.beforeEntityRemoved(nextCustomer);
      nextCustomer.setPreviousStandstill(null);
      scoreDirector.beforeEntityRemoved(nextCustomer);
   }

but this throw an exception like:
java.lang.IllegalStateException: The ScoreDirector (class
org.optaplanner.core.impl.score.director.common.TrailingEntityMapSupport)
is corrupted, because the entity (10(after null)) for chained
planningVariable (previousStandstill) cannot be retracted: it was never
inserted.

Can you take a look to the test I have attached and guide me to solve this?

Thanks a lot.
Regards







2013/11/4 Geoffrey De Smet <ge0ffrey.spam at gmail.com>

>
> On 01-11-13 19:38, Juan Ignacio Barisich wrote:
>
>     Hi everybody
>  I am using optaplanner in real-time style. My application domain is
> similar to the "Vehicle Routing" example (
> http://docs.jboss.org/drools/release/6.0.0.CR5/optaplanner-docs/html_single/index.html#vehicleRouting).
> I mean, I am using chained variables and shadow variables. I have a problem
> while trying to remove a fact (an entity), via a ProblemFactChange:
>
> java.lang.IllegalArgumentException: The entity instance (...) was never
> added to this ScoreDirector. Usually the cause is that that specific
> instance was not in your Solution's entities.
>
>  The fact removing that I made is like:
>
> solver.addProblemFactChange(new ProblemFactChange() {
>
>             @Override
>             public void doChange(ScoreDirector scoreDirector) {
>                 ...
>                 scoreDirector.beforeEntityRemoved(toRemove);
>                 workingSolution.getCustomerList().remove(toRemove);
>
> the remove() method will make no difference because the Customer
> "toRemove" instance
> is not the same instance as which is in the workingSolution's Customer
> list.
>
> See the CloudBalancing's PRoblemFactChange implementation how to solve
> this.
> And one of the warnings in the Real-time planning section of the docs to
> understand it better:)
>
>                    scoreDirector.afterEntityRemoved(toRemove);
>             }
>         });
>
>  I think the problem is there. Do you know what I'm doing wrong?
>  I have attached a test case based on the "Vehicle Routing". To run it,
> just put that file into the
> optaplanner-distribution-6.0.0.CR5/examples/sources/src/test/java/org/optaplanner/examples/vehiclerouting/app/
> directory.
>
>  <http://drools.46999.n3.nabble.com/file/n4017760/serverlog.zip>I'd
> appreciate any ideas on how to resolve this.
> Best regards,
>
>  Juan Ignacio Barisich
>
>
>
>
>
>
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