[rules-users] modifying the problem facts while running the solver - Drools Planner

[Garf]

spinjala wrote
> 
> I tried setting the scoreAttained and maximum time allowed to spend in my
> termination configuration, but none seems to stop the solver finding the
> solution that violates ALL constraints  and hence throws a negative hard
> score. Is this the only way to do it or any other way is available to
> force the solver not to look for a solution when ALL constraints are
> violated?
> 

>From Planner's perspective, there are multiple possible solutions.
Each solution has a score, a combination of the hard and soft scores, each
of which represents the sum of constraint violations.
If the scores are <0, then the solution is nonoptimal; and thus, it will
keep looking.

You might try the termination/maximumUnimprovedStepCount config setting.
(see section 6.6.4 of the doc)

This stops the solving after a number of steps have been tried without any
improvement to the score.

Jon




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