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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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<?xml version="1.0" encoding="UTF-8"?>
<solver xmlns="https://www.optaplanner.org/xsd/solver" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="https://www.optaplanner.org/xsd/solver https://www.optaplanner.org/xsd/solver/solver.xsd">
  <!-- To slowly prove there are no bugs in this code -->
  <!--<environmentMode>FULL_ASSERT</environmentMode>-->
  <!-- To solve faster by saturating multiple CPU cores -->
  <!--<moveThreadCount>AUTO</moveThreadCount>-->

  <solutionClass>org.optaplanner.examples.examination.domain.Examination</solutionClass>
  <entityClass>org.optaplanner.examples.examination.domain.Exam</entityClass>
  <entityClass>org.optaplanner.examples.examination.domain.LeadingExam</entityClass>
  <entityClass>org.optaplanner.examples.examination.domain.FollowingExam</entityClass>

  <scoreDirectorFactory>
    <constraintProviderClass>org.optaplanner.examples.examination.score.ExaminationConstraintProvider</constraintProviderClass>
    <initializingScoreTrend>ONLY_DOWN</initializingScoreTrend>
  </scoreDirectorFactory>

  <termination>
    <minutesSpentLimit>5</minutesSpentLimit>
  </termination>
  <constructionHeuristic>
    <queuedEntityPlacer>
      <entitySelector id="placerEntitySelector">
        <entityClass>org.optaplanner.examples.examination.domain.Exam</entityClass>
        <cacheType>PHASE</cacheType>
        <selectionOrder>SORTED</selectionOrder>
        <sorterManner>DECREASING_DIFFICULTY</sorterManner>
      </entitySelector>
      <cartesianProductMoveSelector>
        <changeMoveSelector>
          <entitySelector mimicSelectorRef="placerEntitySelector"/>
          <valueSelector variableName="period">
            <downcastEntityClass>org.optaplanner.examples.examination.domain.LeadingExam</downcastEntityClass>
            <cacheType>PHASE</cacheType>
            <!--<selectionOrder>SORTED</selectionOrder>-->
            <!--<sorterManner>INCREASING_STRENGTH</sorterManner>-->
          </valueSelector>
        </changeMoveSelector>
        <changeMoveSelector>
          <entitySelector mimicSelectorRef="placerEntitySelector"/>
          <valueSelector variableName="room">
            <cacheType>PHASE</cacheType>
            <selectionOrder>SORTED</selectionOrder>
            <sorterManner>INCREASING_STRENGTH</sorterManner>
          </valueSelector>
        </changeMoveSelector>
      </cartesianProductMoveSelector>
    </queuedEntityPlacer>
  </constructionHeuristic>
  <localSearch>
    <unionMoveSelector>
      <cartesianProductMoveSelector>
        <changeMoveSelector>
          <entitySelector id="cartesianProductEntitySelector">
            <entityClass>org.optaplanner.examples.examination.domain.Exam</entityClass>
          </entitySelector>
          <valueSelector variableName="room"/>
        </changeMoveSelector>
        <changeMoveSelector>
          <entitySelector mimicSelectorRef="cartesianProductEntitySelector"/>
          <valueSelector variableName="period">
            <downcastEntityClass>org.optaplanner.examples.examination.domain.LeadingExam</downcastEntityClass>
          </valueSelector>
        </changeMoveSelector>
      </cartesianProductMoveSelector>
      <swapMoveSelector>
        <entitySelector>
          <entityClass>org.optaplanner.examples.examination.domain.LeadingExam</entityClass>
        </entitySelector>
      </swapMoveSelector>
    </unionMoveSelector>
    <acceptor>
      <entityTabuSize>10</entityTabuSize>
    </acceptor>
    <forager>
      <acceptedCountLimit>2000</acceptedCountLimit>
    </forager>
  </localSearch>
</solver>