【发布时间】：2017-06-21 11:46:29
【问题描述】：
问题：Rule(InterestRate.drl) 在独立的 java 代码中被触发并给出准确的结果
package com.test.drool.config;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import com.test.drool.facts.InterestRate;
public class RunSampleInterestRate {
public static void main(String[] args) {
// TODO Auto-generated method stub
KieContainer container= KieServices.Factory.get().getKieClasspathContainer();
InterestRate interestRate=new InterestRate();
interestRate.setLender("RBL");
System.out.println("printing session object before inserting"+interestRate.toString());
KieSession kieSession=container.newKieSession("ksession-rules");
kieSession.insert(interestRate);
kieSession.fireAllRules();
System.out.println(interestRate.getRate());
}
}
给我预期的 12.5 作为利率。
问题：我必须将此集成到休息服务中，并且我一直在尝试在休息环境下测试相同的逻辑，但它没有给我预期的结果。触发规则后，服务 总是返回默认值 0.0。我的环境是 Spring-boot，而 drool 是 6.5.0 final。
POJO：
package com.test.drool.facts;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@JsonIgnoreProperties(ignoreUnknown=true)
public class InterestRate {
@Override
public String toString() {
return "InterestRate [lender=" + lender + ", principal=" + principal + ", store=" + store
+ ", dealer=" + dealer + ", rate=" + rate + "]";
}
private String lender;
private String principal;
private String store;
private String dealer;
private double rate;
public double getRate() {
return rate;
}
public void setRate(double rate) {
this.rate = rate;
}
public String getLender() {
return lender;
}
public void setLender(String lender) {
this.lender = lender;
}
public String getPrincipal() {
return principal;
}
public void setPrincipal(String principal) {
this.principal = principal;
}
public String getStore() {
return store;
}
public void setStore(String store) {
this.store = store;
}
public String getDealer() {
return dealer;
}
public void setDealer(String dealer) {
this.dealer = dealer;
}
}
Bean 配置
package com.test.drool.config;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class DroolDependencyConfig {
@Bean(name="kieContainer")
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
}
控制器：
package com.test.drool.controllers;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.test.drool.facts.InterestRate;
import com.test.drool.service.RuleExecuteService;
@RestController
@RequestMapping(value="/rule")
public class RuleExecuteController {
@Autowired
private RuleExecuteService executeService;
private static Logger logger=LoggerFactory.getLogger(RuleExecuteController.class);
@PostMapping(value = "/execute", consumes = MediaType.APPLICATION_JSON_VALUE,produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Double> getInterestRate(@RequestBody InterestRate interestRate){
logger.info(String.format("logging Request Object %s",interestRate.toString()));
return new ResponseEntity<Double>(executeService.executeRule(interestRate),HttpStatus.OK);
}
}
RuleServiceImpl：
package com.test.drool.service.impl;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.test.drool.facts.InterestRate;
import com.test.drool.service.RuleExecuteService;
@Service
public class RuleExecutorServiceImpl implements RuleExecuteService {
private KieContainer kieContainer;
private static org.slf4j.Logger logger=LoggerFactory.getLogger(RuleExecutorServiceImpl.class);
@Autowired
public RuleExecutorServiceImpl(KieContainer kieContainer) {
this.kieContainer=kieContainer;
}
@Override
public double executeRule(InterestRate interestRate) {
logger.info("firing up session and executing rules");
KieSession kieSession= kieContainer.newKieSession("ksession-rules");
logger.info("Printing object before inserting in session"+interestRate.toString());
kieSession.insert(interestRate);
kieSession.fireAllRules();
System.out.println("returning values from rule execution"+">>>"+interestRate.getRate());
return interestRate.getRate();
}
}
DRL 文件：
包 com.test.drool.facts
rule "Interest Rate"
when
$interestrate := InterestRate(lender.equals("RBL"))
then
$interestrate.setRate(12.30);
end
Gradle 依赖：
dependencies {
compile "org.kie:kie-spring:${droolsVersion}"
compile "org.kie:kie-api:${droolsVersion}"
compile "org.drools:drools-core:${droolsVersion}"
compile "org.drools:drools-compiler:${droolsVersion}"
//compile('org.springframework.cloud:spring-cloud-starter-eureka')
compile('org.springframework.boot:spring-boot-starter-actuator')
compile ('org.springframework.boot:spring-boot-starter-web')
compile ('org.springframework.boot:spring-boot-starter-data-rest')
compile ('org.springframework.boot:spring-boot-devtools')
testCompile('org.springframework.boot:spring-boot-starter-test')
compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.2'
compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.0'
}
【问题讨论】：
-
你通过的贷方是RBL吗？你能添加你的日志记录吗
-
是的，我添加了记录器并确认 RBL 作为一个值从我的休息控制器传递回我的服务，并在那里注入到规则会话中。
-
我的意思是在你的问题中添加你的日志输出。请更改您的规则并删除
lender.equals("RBL")部分，然后查看您的规则是否触发。我希望问题会出现在某个地方 -
规则中的
:=看起来很有趣。:就足够了。另外，lender == "RBL"是标准的写法。 -
我做了这些更改，但问题仍然是如何从 StandAlone 部分而不是从 Spring 应用程序中执行相同的 drl 文件。这是这个问题的症结所在。kissession 是我们需要执行的全部规则。不确定我是否在这里遗漏了什么。
标签： spring-boot drools drools-kie-server