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

On 04-11-13 13:10, Juan Ignacio Barisich wrote:

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);

Ok, then that's not the problem indeed.

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.

Ah, that explains it.

Although you remove the customer instance toRemove,
one of the other customers still has it as previousStandstill
and/or one of the other customers still has it as nextStandstill.
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@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.

I'd appreciate any ideas on how to resolve this.
Best regards,

Juan Ignacio Barisich
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