运行Drools时出错-我应该如何调试？

Question

我在一个Java程序（在本例中是Optaplanner的变体）中有一个Drools文件，它是在NetBeans8上构建的。当我运行程序时，我会得到一条错误消息：

Exception in thread "main" java.lang.IllegalArgumentException: The scoreDrl (taskassignment/solver/taskAssignmentScoreRules.drl) does not exist as a classpath resource.
at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildKieBase(ScoreDirectorFactoryConfig.java:304)
at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:279)
at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:186)
at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:174)
at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:145)
at org.optaplanner.core.config.solver.XmlSolverFactory.buildSolver(XmlSolverFactory.java:101)
at taskassignment.app.TaskAssignmentHelloWorld.main(TaskAssignmentHelloWorld.java:32)

在Googles错误mesage之后，似乎并不存在，因为当drools代码中出现错误时，是从Optaplanner抛出的类路径资源。

我的问题是，由于没有关于错误在drools文件中的位置的进一步信息，调试这段代码的好方法是什么？有没有任何插件可以帮助我缩小问题的范围，就像Netbeans通常在Java中遇到的问题一样？

下面是我的Drools代码：

package taskassignment.solver;
dialect "java"

import org.optaplanner.core.api.score.buildin.hardsoft.HardSoftScoreHolder;

import taskassignment.domain.TaskAssignment;
import taskassignment.domain.Task;
import taskassignment.domain.Dev;

global HardSoftScoreHolder scoreHolder;

// ############################################################################
// Hard constraints
// ############################################################################

rule "DevCanOnlyDoOneTask"
when
    $T1:Task
    $T2:Task
    $D:Dev
    (($T1.getAssignedDev()=$D)&&($T2.getAssignedDev()=$D)&&(($T2.getAllottedStartTime()<=$T1.getAllottedStartTime())&&($T1.getAllottedStartTime()<$T2.getAllottedStartTime()+$T2.getDuration()))||(($T1.getAllottedStartTime()<=$T2.getAllottedStartTime())&&($T2.getAllottedStartTime()<$T1.getAllottedStartTime()+$T1.getDuration()))

then
    scoreHolder.addHardConstraintMatch(kcontext,-1000);
end

// ############################################################################
// Soft constraints
// ############################################################################

rule "MaximiseEarliestFinishTime"
when
    $TA: TaskAssignment
    $EFT: $TA.getEFT()

then
    scoreHolder.addSoftConstraintMatch(kcontext,+$EFT);

谢谢伙计们

Answer 1

当drools(DRL)代码出现错误时，它会抛出一个不同的异常，来自drools，并说明错误消息在DRL的哪一行。

信息

The scoreDrl (taskassignment/solver/taskAssignmentScoreRules.drl) does not exist as a classpath resource.

意味着您已经在求解器配置中配置了

<scoreDrl>taskassignment/solver/taskAssignmentScoreRules.drl</scoreDrl>

PROJECT_DIR/src/main/resources/taskassignment/solver/taskAssignmentScoreRules.drl

在6.0中，您需要配置：

<scoreDrl>/taskassignment/solver/taskAssignmentScoreRules.drl</scoreDrl>

在6.1中，您需要配置：

<scoreDrl>taskassignment/solver/taskAssignmentScoreRules.drl</scoreDrl>

注意：您可能希望遵循java约定并使用反向url命名空间。因此，我将使用com/mycompany/taskassignment/solver/...而不是taskassignment/solver/...。