java – 版本6.2的drools代码不推荐使用

我有一个旧的和已删除的drools代码,这段代码可以读取容器外的规则文件(drl),并且可以使用任何Value Object和任何类.

            CommandExecutor ksession;
            KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
            String file = System.getenv("DOMAIN_HOME")+"/mydrls/business.drl";
            kbuilder.add(ResourceFactory.newFileResource(file), ResourceType.DRL);
            KnowledgeBase kbase = kbuilder.newKnowledgeBase();
            ksession = kbase.newStatelessKnowledgeSession();
            DataTest data = new DataTest();
            data.setAge(25);
            List cmds = new ArrayList();
            cmds.add( CommandFactory.newInsert( data ) );
            ksession.execute(CommandFactory.newBatchExecution( cmds ));

我怎么能用drools版本6.2做同样的事情？

解决方法:

您可以使用KieHelper类简化Laune的代码：

KieHelper kieHelper = new KieHelper();         
kieHelper.addResource(ResourceFactory.newInputStreamResource(new FileInputStream( "simple/simple.drl" )), ResourceType.DRL);

Results results = kieHelper.verify();
if( results.hasMessages( Message.Level.ERROR ) ){
    System.out.println( results.getMessages() );
    throw new IllegalStateException( "### errors ###" );
}

StatelessKieSession kieSession = kieHelper.build().newStatelessKieSession();

希望能帮助到你.

标签：drools,java,rule-engine
来源： https://codeday.me/bug/20191002/1842823.html