有没有办法在施工阶段使用 sorterClass ？

Question

问题概述：

我们正在为用户分配任务只能将一项任务分配给用户任务可以是可变长度：1-16 小时用户一次只能执行一项任务用户每天有 8 小时我们正在使用时间颗粒模式 - 1 颗粒 = 1 小时。由于任务的长度可变，并非所有 TimeGrains 都用于给定用户

使用默认排序不会return在 10 分钟内得到解决方案。

我使用以下配置取得了一些成功（结果 return 在几秒钟内完成）

  <constructionHeuristic>
    <changeMoveSelector>
      <selectionOrder>RANDOM</selectionOrder>
      <selectedCountLimit>300</selectedCountLimit>
      <valueSelector variableName="user"/>
    </changeMoveSelector>
    <changeMoveSelector>
      <valueSelector variableName="startDate"/>
    </changeMoveSelector>
  </constructionHeuristic>

然而这似乎导致任务分配不均。我尝试实现自定义排序，即

<sorterClass>com.example.UserSelectionSorter</sorterClass>

但这会产生以下错误：

Exception in thread "main" java.lang.IllegalStateException: Replay must occur after record. The recordingEntitySelector (Recording(FromSolutionEntitySelector(SubTask)))'s hasNext() has not been called yet.
        at org.optaplanner.core.impl.heuristic.selector.entity.mimic.MimicReplayingEntitySelector$ReplayingEntityIterator.hasNext(MimicReplayingEntitySelector.java:117)
        at org.optaplanner.core.impl.heuristic.selector.common.iterator.AbstractOriginalChangeIterator.createUpcomingSelection(AbstractOriginalChangeIterator.java:47)
        at org.optaplanner.core.impl.heuristic.selector.common.iterator.AbstractOriginalChangeIterator.createUpcomingSelection(AbstractOriginalChangeIterator.java:26)
        at org.optaplanner.core.impl.heuristic.selector.common.iterator.UpcomingSelectionIterator.hasNext(UpcomingSelectionIterator.java:43)
        at java.base/java.util.Iterator.forEachRemaining(Iterator.java:132)
        at org.optaplanner.core.impl.heuristic.selector.move.decorator.AbstractCachingMoveSelector.constructCache(AbstractCachingMoveSelector.java:77)
        at org.optaplanner.core.impl.heuristic.selector.move.decorator.SortingMoveSelector.constructCache(SortingMoveSelector.java:43)
        at org.optaplanner.core.impl.heuristic.selector.common.SelectionCacheLifecycleBridge.phaseStarted(SelectionCacheLifecycleBridge.java:51)
        at org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport.firePhaseStarted(PhaseLifecycleSupport.java:37)
        at org.optaplanner.core.impl.heuristic.selector.AbstractSelector.phaseStarted(AbstractSelector.java:50)
        at org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport.firePhaseStarted(PhaseLifecycleSupport.java:37)
        at org.optaplanner.core.impl.heuristic.selector.AbstractSelector.phaseStarted(AbstractSelector.java:50)
        at org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport.firePhaseStarted(PhaseLifecycleSupport.java:37)
        at org.optaplanner.core.impl.constructionheuristic.placer.AbstractEntityPlacer.phaseStarted(AbstractEntityPlacer.java:44)
        at org.optaplanner.core.impl.constructionheuristic.DefaultConstructionHeuristicPhase.phaseStarted(DefaultConstructionHeuristicPhase.java:118)
        at org.optaplanner.core.impl.constructionheuristic.DefaultConstructionHeuristicPhase.solve(DefaultConstructionHeuristicPhase.java:65)
        at org.optaplanner.core.impl.solver.AbstractSolver.runPhases(AbstractSolver.java:99)
        at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:192)
        at com.example.App.main(App.java:50)

Answer 1

见advanced configuration of a Construction heuristic。这明确地写了模仿 recording/replay 。这允许您进入第一个 entitySelector（所以不是 ref ）并在那里使用 sorterClass。

有没有办法在施工阶段使用 sorterClass ？

Is there a way to use sorterClass during construction phase?

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