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
如果它有帮助,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,我知道 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Rule Validator代码和我从规则文件加载Knowledge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;
}
}
1 回答
感谢提示@Nim
终于弄清楚了 . 我应该正确阅读API文档 .
显然,我在
StatelessKnowledgeSession
中使用了Iterable
重载的execute
方法,该方法遍历我的所有事实并对其中的每一个应用规则 .但是,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 .StatefulKnowledgeSession
中没有insert(Iterable)
方法的任何原因 .