Question

当使用RuleServiceClient从Java应用程序调用时，我从Drools Execution Server收到成功但EMPTY结果，尽管来自Postman的REST调用返回预期结果。

我的问题：我的Java代码中有什么不正确？

请在下面找到详细信息。

我创建了示例规则（如果是字段Message.MyField == 1，然后将此字段设置为400），我就可以使用Postmen在KIE Execution Server上触发它：

对http://SERVER:8080/kie-server-webc/services/rest/server/containers/instances/kie-container的POST请求：

{
    "lookup": "defaultStatelessKieSession",
    "commands": [{
        "insert": {
            "object": {
                "Message": {
                    "myField": 1
                }
            },
            "disconnected": false,
            "out-identifier": "Message",
            "return-object": true,
            "entry-point": "DEFAULT"
        }
    }, {
        "fire-all-rules": {
            "max": -1,
            "out-identifier": null
        }
    }]
}

回复（请注意"myField": 500）：

{
  "type": "SUCCESS",
  "msg": "Container kie-container successfully called.",
  "result": {
    "execution-results": {
      "results": [
        {
          "key": "Message",
          "value": {
            "bnym.test1.Message": {
              "myField": 500
            }
          }
        }
      ],
      "facts": [
        {
          "key": "Message",
          "value": {
            "org.drools.core.common.DefaultFactHandle": {
              "external-form": "0:1:1208207159:1208207159:2:DEFAULT:NON_TRAIT:myProj.test1.Message"
            }
          }
        }
      ]
    }
  }
}

借用教程的我的Java客户端代码是：

public class Message{
    public Integer myField; 
}

。。

private static String URL = "http://SERVER:8080/kie-server-webc/services/rest/server";    
private static final String USER = "user";  
private static final String PASSWORD = "pwd";

。。

public void transform() throws Exception {
    Message m = new Message();
    m.myField = 1;

    KieServicesConfiguration config = KieServicesFactory.newRestConfiguration(URL, USER, PASSWORD);  
    config.setMarshallingFormat(MarshallingFormat.JSON);  
    kieServicesClient = KieServicesFactory.newKieServicesClient(config); 

    RuleServicesClient rulesClient = kieServicesClient.getServicesClient(RuleServicesClient.class);  
    KieCommands commandsFactory = KieServices.Factory.get().getCommands();  

    Command<?> insert = commandsFactory.newInsert(m);  
    Command<?> fireAllRules = commandsFactory.newFireAllRules(); 
    Command<?> batchCommand = commandsFactory.newBatchExecution(Arrays.asList(insert, fireAllRules));  //0
    ServiceResponse<String> executeResponse = rulesClient.executeCommands("kie-container", batchCommand);

    if(executeResponse.getType() == ResponseType.SUCCESS) {  
        System.out.println("Commands executed with success! Response: ");  
        System.out.println(executeResponse.getResult());  
    }
}

结果：

Commands executed with success! Response: 
{
  "results" : [ ],
  "facts" : [ ]
}

我的问题：我的Java代码中有什么不正确所以结果是空的？

谢谢

Answer 1

我建议打开客户端的调试日志记录，查看已发送的请求，并将其与其他请求进行比较，以找出与其不符的内容。

对于您的应用正在使用的任何日志记录系统，请将此记录器设置为DEBUG（或者只是将所有内容设置为DEBUG，如果这对您更好）： org.kie.server.client.impl.AbstractKieServicesClientImpl

Answer 2

如果你想继续使用无状态会话，那么你应该创建一个无状态会话，按照示例代码：

public static StatelessKieSession getStatelessKieSession() {
    KieServices ks = KieServices.Factory.get();
    KieContainer kContainer = ks.getKieClasspathContainer();
    StatelessKieSession kSession = kContainer.newStatelessKieSession("defaultStatelessKieSession");
    return kSession;
}

public void runRulesStateless(List<Object> objects) {
    getStatelessKieSession().execute(objects);
}

public static void main(String[] args) {
    runRulesStateless(Arrays.asList(new Object[] { new Message() }));
}

如果您想要一个不同的无状态会话，您可以在kmodule.xml中配置

Answer 3

尝试使用以下命令：

Message m = new Message();
m.myField = 1;
Command<?> insert = commandsFactory.newInsert(m,  "Message",true, "DEFAULT");

这等效于您使用的json请求：

"insert": {
        "object": {
            "Message": {
                "myField": 1
            }
        },
        "out-identifier": "Message",
        "return-object": true,
        "entry-point": "DEFAULT"
    }

KIE RuleServicesClient返回空响应

3 个答案: