SpringBoot2整合Drools规则引擎及案例详解

package droolRule ;
import org.slf4j.Logger
import org.slf4j.LoggerFactory ;
dialect "java"
rule "paramcheck1"
  when 
  then
    final Logger LOGGER = LoggerFactory.getLogger("param-check-one 规则引擎") ;
    LOGGER.info("参数");
end

<!--drools规则引擎-->
<dependency>
  <groupId>org.drools</groupId>
  <artifactId>drools-core</artifactId>
  <version>7.6.0.Final</version>
</dependency>
<dependency>
  <groupId>org.drools</groupId>
  <artifactId>drools-compiler</artifactId>
  <version>7.6.0.Final</version>
</dependency>
<dependency>
  <groupId>org.drools</groupId>
  <artifactId>drools-templates</artifactId>
  <version>7.6.0.Final</version>
</dependency>
<dependency>
  <groupId>org.kie</groupId>
  <artifactId>kie-api</artifactId>
  <version>7.6.0.Final</version>
</dependency>
<dependency>
  <groupId>org.kie</groupId>
  <artifactId>kie-spring</artifactId>
  <version>7.6.0.Final</version>
</dependency>

@Configuration
public class RuleEngineConfig {
  private static final Logger LOGGER = LoggerFactory.getLogger(RuleEngineConfig.class) ;
  private static final String RULES_PATH = "droolRule/";
  private final KieServices kieServices = KieServices.Factory.get();
  @Bean
  public KieFileSystem kieFileSystem() throws IOException {
    KieFileSystem kieFileSystem = kieServices.newKieFileSystem();
    ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
    Resource[] files = resourcePatternResolver.getResources("classpath*:" + RULES_PATH + "*.*");
    String path = null;
    for (Resource file : files) {
      path = RULES_PATH + file.getFilename();
      LOGGER.info("path="+path);
      kieFileSystem.write(ResourceFactory.newClassPathResource(path, "UTF-8"));
    }
    return kieFileSystem;
  }
  @Bean
  public KieContainer kieContainer() throws IOException {
    KieRepository kieRepository = kieServices.getRepository();
    kieRepository.addKieModule(kieRepository::getDefaultReleaseId);
    KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem());
    kieBuilder.buildAll();
    return kieServices.newKieContainer(kieRepository.getDefaultReleaseId());
  }
  @Bean
  public KieBase kieBase() throws IOException {
    return kieContainer().getKieBase();
  }
  @Bean
  public KieSession kieSession() throws IOException {
    return kieContainer().newKieSession();
  }
  @Bean
  public KModuleBeanFactoryPostProcessor kiePostProcessor() {
    return new KModuleBeanFactoryPostProcessor();
  }
}

dialect "java"
rule "paramcheck1"
salience 99
when queryParam : QueryParam(paramId != null && paramSign.equals("+"))
  resultParam : RuleResult()
then
  final Logger LOGGER = LoggerFactory.getLogger("param-check-one 规则引擎") ;
  LOGGER.info("参数:getParamId="+queryParam.getParamId()+";getParamSign="+queryParam.getParamSign());
  RuleEngineServiceImpl ruleEngineService = new RuleEngineServiceImpl() ;
  ruleEngineService.executeAddRule(queryParam);
  resultParam.setPostCodeResult(true);
end

dialect "java"
rule "paramcheck2"
salience 88
when queryParam : QueryParam(paramId != null && paramSign.equals("-"))
  resultParam : RuleResult()
then
  final Logger LOGGER = LoggerFactory.getLogger("param-check-two 规则引擎") ;
  LOGGER.info("参数:getParamId="+queryParam.getParamId()+";getParamSign="+queryParam.getParamSign());
  RuleEngineServiceImpl ruleEngineService = new RuleEngineServiceImpl() ;
  ruleEngineService.executeRemoveRule(queryParam);
  resultParam.setPostCodeResult(true);
end

@Service
public class RuleEngineServiceImpl implements RuleEngineService {
  private static final Logger LOGGER = LoggerFactory.getLogger(RuleEngineServiceImpl.class) ;
  @Override
  public void executeAddRule(QueryParam param) {
    LOGGER.info("参数数据:"+param.getParamId()+";"+param.getParamSign());
    ParamInfo paramInfo = new ParamInfo() ;
    paramInfo.setId(param.getParamId());
    paramInfo.setParamSign(param.getParamSign());
    paramInfo.setCreateTime(new Date());
    paramInfo.setUpdateTime(new Date());
    ParamInfoService paramInfoService = (ParamInfoService)SpringContextUtil.getBean("paramInfoService") ;
    paramInfoService.insertParam(paramInfo);
  }
  @Override
  public void executeRemoveRule(QueryParam param) {
    LOGGER.info("参数数据:"+param.getParamId()+";"+param.getParamSign());
    ParamInfoService paramInfoService = (ParamInfoService)SpringContextUtil.getBean("paramInfoService") ;
    ParamInfo paramInfo = paramInfoService.selectById(param.getParamId());
    if (paramInfo != null){
      paramInfoService.removeById(param.getParamId()) ;
    }
  }
}

@RestController
@RequestMapping("/rule")
public class RuleController {
  @Resource
  private KieSession kieSession;
  @Resource
  private RuleEngineService ruleEngineService ;
  @RequestMapping("/param")
  public void param (){
    QueryParam queryParam1 = new QueryParam() ;
    queryParam1.setParamId("1");
    queryParam1.setParamSign("+");
    QueryParam queryParam2 = new QueryParam() ;
    queryParam2.setParamId("2");
    queryParam2.setParamSign("-");
    // 入参
    kieSession.insert(queryParam1) ;
    kieSession.insert(queryParam2) ;
    kieSession.insert(this.ruleEngineService) ;
    // 返参
    RuleResult resultParam = new RuleResult() ;
    kieSession.insert(resultParam) ;
    kieSession.fireAllRules() ;
  }
}