直接从存储库加载Drools/KIE Workbench工件

Question

我们尝试使用全新的KIE工作台(以前称为Guvnor)和新的基于maven的工件切换到Drools 6.

现在我想在第二张图片("部署")中使用本博文中描述的系统:通过HTTP从工作台存储库加载规则(虚线箭头,从左边的HTTP直接进入应用程序) .

问题是,我不知道如何将工件加载到我的KieServices/KieModule对象中.我基本上不想使用maven,我也无法提供maven settings.xml作为Java参数的全局路径,所以这个选项已经出来了.

我认为,类似的问题是这一个.正如那里提到的,我也试图加载一个URL资源,但问题似乎是系统无法确定ResourceType给定的URL(http://localhost:8080/kie-drools/maven2/.../-1.0.0.jar)是什么类型.是的,我可以直接从浏览器访问存储库中的.jar,无需身份验证.

任何想法或教程如何做到这一点？

我的测试代码:

public static void main(String[] args) {
    KieServices ks = KieServices.Factory.get();
    KieRepository repo = ks.getRepository();

    String url = "http://localhost:8080/kie-drools/maven2/de/test/test/1.0.0/test-1.0.0.jar";

    Resource urlResource = ks.getResources().newUrlResource(url);
    KieModule kModule = repo.addKieModule(urlResource); // this already fails
}

错误:

Exception in thread "main" java.lang.RuntimeException: Unable to fetch module from resource :[UrlResource path='http://localhost:8080/kie-drools/maven2/de/itm/Herma400/1.0.1/Herma400-1.0.1.jar']
    at org.drools.compiler.kie.builder.impl.KieRepositoryImpl.getKieModule(KieRepositoryImpl.java:205)
    at org.drools.compiler.kie.builder.impl.KieRepositoryImpl.addKieModule(KieRepositoryImpl.java:161)
    at kieTest.MainKieTest.main(MainKieTest.java:24)
Caused by: java.lang.NullPointerException
    at org.drools.compiler.kie.builder.impl.ClasspathKieProject.getPomProperties(ClasspathKieProject.java:197)
    at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:148)
    at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:109)
    at org.drools.compiler.kie.builder.impl.KieRepositoryImpl.getKieModule(KieRepositoryImpl.java:190)
    ... 2 more

提前致谢!

Answer 1

我终于设法解决了这个问题.下面是一个工作示例,它通过HTTP从KIE存储库加载Drools工件并执行规则:

package kieTest;

import java.util.Scanner;

import org.drools.compiler.kproject.ReleaseIdImpl;
import org.kie.api.KieServices;
import org.kie.api.builder.KieScanner;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.StatelessKieSession;

public class MainKieTest {

    public static void main(String[] args) {

        // works even without -SNAPSHOT versions
        String url = "http://localhost:8080/kie-drools/maven2/de/test/Test/1.2.3/Test-1.2.3.jar";

        // make sure you use "LATEST" here!
        ReleaseIdImpl releaseId = new ReleaseIdImpl("de.test", "Test", "LATEST");

        KieServices ks = KieServices.Factory.get();

        ks.getResources().newUrlResource(url);

        KieContainer kieContainer = ks.newKieContainer(releaseId);

        // check every 5 seconds if there is a new version at the URL
        KieScanner kieScanner = ks.newKieScanner(kieContainer);
        kieScanner.start(5000L);
        // alternatively:
        // kieScanner.scanNow();

        Scanner scanner = new Scanner(System.in);
        while (true) {
            runRule(kieContainer);
            System.out.println("Press enter in order to run the test again....");
            scanner.nextLine();
        }
    }

    private static void runRule(KieContainer kieKontainer) {
        StatelessKieSession kSession = kieKontainer.newStatelessKieSession("testSession");
        kSession.setGlobal("out", System.out);
        kSession.execute("testRuleAgain");
    }
}

在搜索解决方案时,我发现以下链接很有用:

• http://www.skills421.com/tutorials-drools-components.jsp
• http://blog.athico.com/2013/12/deployment-with-drools-60.html

我希望有人在将SO作为第一个搜索结果时发现这个有用;-)

Answer 2

上面的代码使用maven和kie-ci.您创建的URLResource未使用.

这是一个工作样本:

    String url = "http://localhost:8080/kie-drools-wb/maven2/groupId/artifactId/1.0/artifactId-1.0.jar";

    KieServices ks = KieServices.Factory.get();
    KieRepository kr = ks.getRepository();
    UrlResource urlResource = (UrlResource) ks.getResources()
            .newUrlResource(url);
    urlResource.setUsername("admin");
    urlResource.setPassword("password");
    urlResource.setBasicAuthentication("enabled");
    InputStream is = urlResource.getInputStream();
    KieModule kModule = kr.addKieModule(ks.getResources()
            .newInputStreamResource(is));

    KieContainer kContainer = ks.newKieContainer(kModule.getReleaseId());

    kContainer.newStatelessKieSession();

请注意,您仍然需要调整一下以允许它与KieScanner一起使用.