潜在的OptaPlanner/Drools错误：奇怪的MultiAccumute ClassCastException

Question

复制说明如下。

我在OptaPlanner计划引擎中使用Drools进行评分。

1. OptaPlanner v8。8.0.期末考试
2. 流v7的口水。55.0.决赛

此格式的规则是否隐式强制转换了MyConstraintConfiguration？

以下规则是否有无效的累积？

rule "name"
    when
        $cc : MyConstraintConfiguration()
        accumulate(PlanningEntity($key : key, $value : $cc.getCachedValue($key));
                                  $sumKeys : sum($key),
                                  $sumValues : sum($value);
                                  checkSum($sumValues))
    then
        // scoreHolder.penalize(...)
end

在我的实际实现中，我有一个非常类似的规则。它不需要第二个sum函数，但添加第二个函数会导致调用org时在生成的Drools Java中抛出ClassCastException。流口水。模型功能。函数2$Impl:：apply。

你不能有一个以上的sum吗？考虑到Drools v7.56.0 Doc，图85，我怀疑这不是一个限制

不幸的是，我无法将生成的代码打印出来以供进一步检查。

在8.8上。x分支/标签

1. 将这段代码添加到ConferenceConstraintConfiguration

    public static final String NOT_A_RULE = "NotARule";
    @ConstraintWeight(NOT_A_RULE)
    private HardMediumSoftScore notARule = HardMediumSoftScore.ofHard(100_000);
    
    private int value = 1;
    
    public int getValue() {
        return this.value;
    }
    
    public void setValue(int value) {
        this.value = value;
    }
    
    public Integer getStringLength(final String s) {
        return map.computeIfAbsent(s, String::length);
    }
    
    public HardMediumSoftScore getNotARule() {
        return this.notARule;
    }
    
    public void setNotARule(HardMediumSoftScore notARule) {
        this.notARule = notARule;
    }

rule "NotARule"
    when
        $ccc : ConferenceConstraintConfiguration($value : value)
        accumulate(Talk($titleLength : $ccc.getStringLength(title));
                   $totalLength : sum($titleLength),
                   $totalLength2 : sum($titleLength);
                   $totalLength > 0)
    then
        scoreHolder.penalize(kcontext, $totalLength);
end

运行会议调度App::main或会议调度ScoreHardConstraintTest中的任何测试（删除类级@禁用后），您应该会得到ClassCastException

如果这是一个错误，请告诉我，我可以为它创建一个问题。

16:03:56.339 [EventQueue-0] INFO  Opened: data\conferencescheduling\unsolved\18talks-6timeslots-5rooms.xlsx
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: class org.optaplanner.examples.conferencescheduling.domain.ConferenceConstraintConfiguration cannot be cast to class org.optaplanner.examples.conferencescheduling.domain.Talk (org.optaplanner.examples.conferencescheduling.domain.ConferenceConstraintConfiguration and org.optaplanner.examples.conferencescheduling.domain.Talk are in unnamed module of loader 'app')
    at org.optaplanner.examples.conferencescheduling.solver.P66.LambdaExtractor66506A5C685462CF06C48BF086E06788.apply(LambdaExtractor66506A5C685462CF06C48BF086E06788.java:1)
    at org.drools.model.functions.Function2$Impl.apply(Function2.java:35)
    at org.drools.model.view.BindViewItem2.eval(BindViewItem2.java:89)
    at org.drools.modelcompiler.constraints.BindingEvaluator.evaluate(BindingEvaluator.java:39)
    at org.drools.modelcompiler.constraints.BindingEvaluator.evaluate(BindingEvaluator.java:35)
    at org.drools.modelcompiler.constraints.LambdaAccumulator$BindingAcc.getAccumulatedObject(LambdaAccumulator.java:142)
    at org.drools.modelcompiler.constraints.LambdaAccumulator.accumulate(LambdaAccumulator.java:77)
    at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:118)
    at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:736)
    at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:181)
    at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:89)
    at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:588)
    at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:555)
    at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:382)
    at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:342)
    at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:178)
    at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:136)
    at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:228)
    at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:91)
    at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:33)
    at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
    at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:869)
    at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:816)
    at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:808)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1345)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1336)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1320)
    at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:105)
    at org.optaplanner.core.impl.score.DefaultScoreManager.updateScore(DefaultScoreManager.java:46)
    at org.optaplanner.examples.common.business.SolutionBusiness.getScore(SolutionBusiness.java:235)
    at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame.resetScreen(SolverAndPersistenceFrame.java:719)
    at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame.setSolutionLoaded(SolverAndPersistenceFrame.java:686)
    at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame$QuickOpenAction.actionPerformed(SolverAndPersistenceFrame.java:247)
    at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame.lambda$0(SolverAndPersistenceFrame.java:202)
    at java.desktop/javax.swing.JList.fireSelectionValueChanged(JList.java:1804)
    at java.desktop/javax.swing.JList$ListSelectionHandler.valueChanged(JList.java:1818)
    at java.desktop/javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:219)
    at java.desktop/javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:186)
    at java.desktop/javax.swing.DefaultListSelectionModel.setValueIsAdjusting(DefaultListSelectionModel.java:723)
    at java.desktop/javax.swing.JList.setValueIsAdjusting(JList.java:2152)
    at java.desktop/javax.swing.plaf.basic.BasicListUI$Handler.mouseReleased(BasicListUI.java:2958)
    at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:298)
    at java.desktop/java.awt.Component.processMouseEvent(Component.java:6632)
    at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
    at java.desktop/java.awt.Component.processEvent(Component.java:6397)
    at java.desktop/java.awt.Container.processEvent(Container.java:2263)
    at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
    at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
    at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
    at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
    at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Answer 1

这是Drools的可执行模型没有提供正确的错误消息，因为这部分规则不正确：

$cc : MyConstraintConfiguration()
accumulate(PlanningEntity($key : key, 
                          $value : $cc.getCachedValue($key)
...

不能在PlanningEntity绑定中使用$cc变量。

我已经申请了JIRA。