我正在尝试使用在 JBRMS 中创建的所有规则运行 Drools 项目。我有一个 401 异常并导致空点。
package pop.blah.test;
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.definition.type.FactType;
@SuppressWarnings("restriction")
public class CarApp {
public static void main(String[] args) {
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent( "MyAgent5" );
kagent.applyChangeSet( ResourceFactory.newUrlResource("http://localhost:8080/jboss-brms/org.drools.guvnor.Guvnor/package/pop.blah.test/CAR"));
KnowledgeBase kbase = kagent.getKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ResourceFactory.getResourceChangeScannerService().start();
try {
FactType carType = kbase.getFactType( "pop.blah.test", "Car" );
Object bmw = carType.newInstance();
carType.set( bmw,"name","My Car" );
carType.set( bmw,"make","BMW" );
carType.set( bmw,"year", 1977);
ksession.insert( bmw );
ksession.fireAllRules();
boolean dest = (Boolean) carType.get( bmw, "destroy" );
if (dest==true) {
System.out.println("I am gona destroy that car!");
}
else {
System.out.println("I am happy with my car!");
}
}
catch (Exception E) {
E.printStackTrace();
}
finally {
ksession.dispose();
}
}
}
这是我得到的错误。
[2011:12:363 14:12:718:debug] KnowledgeAgent building resource map
[2011:12:363 14:12:718:info] KnowledegAgent has started listening for ChangeSet notifications
[2011:12:363 14:12:718:info] KnowledgeAgent created, with configuration:
monitorChangeSetEvents=true scanResources=true scanDirectories=true newInstance=true
[2011:12:363 14:12:765:exception]
java.lang.RuntimeException: Unable to parse ChangeSet
at org.drools.agent.impl.KnowledgeAgentImpl.getChangeSet(KnowledgeAgentImpl.java:393)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)
at pop.blah.test.CarApp.main(CarApp.java:16)
Caused by: java.io.IOException: Server returned HTTP response code: 401 for URL: http://localhost:8080/jboss-brms/org.drools.guvnor.Guvnor/package/pop.blah.test/LATEST
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at org.drools.io.impl.UrlResource.grabStream(UrlResource.java:210)
at org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:146)
at org.drools.io.impl.UrlResource.getReader(UrlResource.java:214)
at org.drools.agent.impl.KnowledgeAgentImpl.getChangeSet(KnowledgeAgentImpl.java:391)
... 2 more
[2011:12:363 14:12:765:exception]
java.lang.RuntimeException: Unable to parse ChangeSet
at org.drools.agent.impl.KnowledgeAgentImpl.getChangeSet(KnowledgeAgentImpl.java:397)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)
at pop.blah.test.CarApp.main(CarApp.java:16)
[2011:12:363 14:12:765:info] KnowledgeAgent applying ChangeSet
Exception in thread "main" java.lang.NullPointerException
at org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:215)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:183)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)
at pop.blah.test.CarApp.main(CarApp.java:16)
我收到 401 异常。我是否需要为该 uri 包含用于身份验证的属性文件？我的资源具有声明性模型和规则。一个简单的规则就是如果汽车的“年份”小于 1989，则将“destroy”的值设置为 true。我在某个地方出错了。有人能帮帮我吗？