读取Guvnor中的规则...

 

配合Guvnor一起使用，简单的实现如下：

 

直接使用Drools 的HelloWorld例子进行改动：

 

代码清单一：

 

 

package com.sample; import org.drools.KnowledgeBase; import org.drools.KnowledgeBaseFactory; import org.drools.agent.KnowledgeAgent; import org.drools.agent.KnowledgeAgentFactory; import org.drools.builder.KnowledgeBuilder; import org.drools.builder.KnowledgeBuilderError; import org.drools.builder.KnowledgeBuilderErrors; import org.drools.builder.KnowledgeBuilderFactory; import org.drools.builder.ResourceType; import org.drools.io.ResourceFactory; import org.drools.logger.KnowledgeRuntimeLogger; import org.drools.logger.KnowledgeRuntimeLoggerFactory; import org.drools.runtime.StatefulKnowledgeSession; /**  * This is a sample class to launch a rule.  */ public class DroolsTest {  public static final void main(String[] args) {   try {    // load up the knowledge base    KnowledgeBase kbase = readKnowledgeBase();    StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();    KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");    // go !    Message message = new Message();    message.setMessage("Hello World");    message.setStatus(Message.HELLO);    ksession.insert(message);    ksession.fireAllRules();    logger.close();   } catch (Throwable t) {    t.printStackTrace();   }  }  private static KnowledgeBase readKnowledgeBase() throws Exception {   KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();      //修改此方法   //kbuilder.add(ResourceFactory.newClassPathResource("Sample.drl"), ResourceType.DRL);   kbuilder.add(ResourceFactory.newUrlResource("http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/com.chen.rules/LATEST"), ResourceType.PKG);   KnowledgeBuilderErrors errors = kbuilder.getErrors();   if (errors.size() > 0) {    for (KnowledgeBuilderError error: errors) {     System.err.println(error);    }    throw new IllegalArgumentException("Could not parse knowledge.");   }   KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();   kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());   //采用Agent的方式 /*  KnowledgeAgent kagent=KnowledgeAgentFactory.newKnowledgeAgent("/deploy.properties");      KnowledgeBase kbase=kagent.getKnowledgeBase();*/   return kbase;  }  public static class Message {      public static final int HELLO = 0;   public static final int GOODBYE = 1;   private String message;   private int status;   public String getMessage() {    return this.message;   }   public void setMessage(String message) {    this.message = message;   }   public int getStatus() {    return this.status;   }   public void setStatus(int status) {    this.status = status;   }     } }

 

部分截图：

 

 

 

图示：

 

测试结果：

 

 

 

------Game Over----------------