Question

我对Drools很新，我可能做的事情非常愚蠢。问题是由于某种原因，我的Drools规则没有被解雇。使用的drools版本是5.4

如果有帮助，当我转回StatelessKnowledgeSession并使用execute方法触发规则时，规则会触发。但是，我需要使用AgendaFilter来过滤规则，我们了解StatelessKnowledgeSession尚不支持议程过滤器。作为第一步，我只是将会话翻转为StatefulKnowledgeSession，插入事实并解除所有规则。

不得不谦卑地说，过去几天我一直在打破这个问题。太糟糕了，文档对于drools并不友好（我参考官方文档和用户指南。

下面引用了规则验证器代码和我从规则文件加载知识的Spring工厂bean。我个人认为，FactoryBean没有任何问题。任何指针都会有很大的帮助。

RuleValidator.java

StatefulKnowledgeSession ksession = knowledgeBase.newStatefulKnowledgeSession();
ksession.setGlobal("validationReport", validationReport);
ksession.setGlobal("simpleCache", simpleCache);
ksession.setGlobal("ruleValidator", this);

ksession.insert(allClientDetails); //this is a list of ClientDetails objects (facts)
ksession.fireAllRules();
ksession.dispose();

return validationReport;

KnowledgeBaseFactory.java

import java.io.IOException;
import java.util.Map;

import org.apache.log4j.Logger;
import org.drools.KnowledgeBase;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.springframework.beans.factory.FactoryBean;


public class KnowledgeBaseFactory implements FactoryBean<KnowledgeBase> {

    private static Logger logger=Logger.getLogger(KnowledgeBaseFactory.class);

    private KnowledgeBase knowledgeBase;

    public KnowledgeBaseFactory(Map<String,ResourceType> resourceMap) throws IOException {
        logger.debug("Resource Map : "+resourceMap);
        final KnowledgeBuilder knowledgeBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        for (Map.Entry<String, ResourceType> eachRuleResource:resourceMap.entrySet()){
            knowledgeBuilder.add(ResourceFactory.newClassPathResource(eachRuleResource.getKey()),eachRuleResource.getValue());

        }

        if (knowledgeBuilder.hasErrors()){
            logger.error(knowledgeBuilder.getErrors().toString());
            throw new RuntimeException(knowledgeBuilder.getErrors().toString());
        }
        knowledgeBase = knowledgeBuilder.newKnowledgeBase();
        knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());
    }

    @Override
    public KnowledgeBase getObject() throws Exception {
        return knowledgeBase;
    }

    @Override
    public Class<?> getObjectType() {
        return knowledgeBase.getClass();
    }

    @Override
    public boolean isSingleton() {
        return true;
    }
}

Answer 1

感谢提示@Nim

终于想通了。我应该正确阅读API文档显然，我在Iterable中使用了execute重载的StatelessKnowledgeSession方法，该方法遍历了我的所有事实并对每个事实应用了规则。

然而，对于StatefulKnowledgeSession，我应该事先迭代并逐个插入事实。然后，我可以解雇规则。

insert(Iterable)中没有StatefulKnowledgeSession方法的原因。

Drools规则没有被解雇

1 个答案: