# Package org.optaplanner.core.impl.score.director.drools

- Class Summary
  Class | Description
  --- | ---
  DroolsScoreDirector<Solution_,​Score_ extends Score<Score_>> | Drools implementation of `ScoreDirector`, which directs the Rule Engine to calculate the `Score` of the `working solution`.
  DroolsScoreDirectorFactory<Solution_,​Score_ extends Score<Score_>> | Drools implementation of `ScoreDirectorFactory`.
  KieBaseExtractor |
  OptaPlannerRuleEventListener |