问题描述

Drools6 规则流的问题

在Drools5老版本drl和**规则流xml**文件是通过KnowledgeBuilder 手动加载的，然后执行的过程和执行drl文件方式差不多，只是多了一句对Process的执行，也就是**ksession.startProcess("ruleflow.salary"); **完整代码引用示例：

 public class EmployTest2 {

    public static void main(String[] args) {

        try {
            // load up the knowledge base
            KnowledgeBase kbase = readKnowledgeBase();
            StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
            KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");

            // go !
            Employ emp = new Employ();
            emp.setEduInfo("master");
            emp.setResume("tech");
            emp.setAnnualExam("good");
            emp.setAwardPunish("award");

            ksession.insert(emp);
            ksession.startProcess("ruleflow.salary");
            ksession.fireAllRules();
            System.out.println("Basic Salary: " + emp.getBasicSalary());
            System.out.println("Duty Salary: " + emp.getDutySalary());
            System.out.println("Bonus      : " + emp.getBonus());
            System.out.println("rate       : " + emp.getPercent());
            System.out.printf("Total Salary: %.0f" , emp.getTotalSalary());
            logger.close();
        } catch (Throwable t) {
            t.printStackTrace();
        }           

    }

    private static KnowledgeBase readKnowledgeBase() throws Exception {
        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kbuilder.add(ResourceFactory.newFileResource("./rules/EduInfoRule.drl"), ResourceType.DRL);
        kbuilder.add(ResourceFactory.newFileResource("./rules/ResumeRule.drl"), ResourceType.DRL);
        kbuilder.add(ResourceFactory.newFileResource("./rules/BonusRule.drl"), ResourceType.DRL);
        kbuilder.add(ResourceFactory.newFileResource("./rules/AwardPunish.drl"), ResourceType.DRL);
        kbuilder.add(ResourceFactory.newFileResource("./rules/TotalRule.drl"), ResourceType.DRL);
        kbuilder.add(ResourceFactory.newFileResource("./rules/saflow.xml"), ResourceType.BPMN2);
        KnowledgeBuilderErrors errors = kbuilder.getErrors();
        if (errors.size() > 0) {
            for (KnowledgeBuilderError error: errors) {
                System.err.println(error);
            }
            throw new IllegalArgumentException("Could not parse knowledge.");
        }
        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
        return kbase;
    }   

}

在Drools6的环境下执行这段规则流示例没有任何问题，而由于Drools6更新了全新的Kie API，所以现在碰到的问题就是使用KieAPI时并不能执行ksession.startProcess("ruleflow.salary");的逻辑，报错如下：
java.lang.IllegalArgumentException: Unknown process ID: ruleflow.salary

xml流文件配置如下：
...
type="RuleFlow" name="salary" id="ruleflow.salary" package-name="ruleflow" >

个人想到的原因可能是因为Drools6自动加载kmodule.xml文件指定下的包路径的drl文件, 而并没有加载流配置文件,就是老版本示例中的 ** kbuilder.add(ResourceFactory.newFileResource("./rules/saflow.xml"), ResourceType.BPMN2);** 这句代码, 所以导致报错,,,
不知道大家有过规则流这方面的接触没有, 本人菜鸟到处找资料,然并卵,,, 百度也无力了...

解决方案

第四天：Drools规则中文化

解决方案二：

是在module中配置kase，ksession吗？