【JAVA一个主Controller类根据交易码字段来访问不同的业务实现ServiceImpl】

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一、想要达到的目的

一个主Controller类根据交易码字段来访问不同的业务实现ServiceImpl

二、代码实现

java代码实现

/**
 * 入口controller类
 */
@Slf4j
@RestController
public class CoreController {

    @AcpsApi
    @PostMapping("/acps")
    public ResponseMsg acpsGate(@Valid @RequestBody RequestMsg requestMsg) throws Exception {
        ResponseMsg  response = BusinessFactory.getService(requestMsg.getHeader().getTrans_code()).doExecute(requestMsg);
        return response;
    }

}


/**
 * BusinessFactory类
 */
public class BusinessFactory {

    private static final Map<String, IBusinessService> SERVICE_MAP = Maps.newHashMap();

    private BusinessFactory() {

    }


    public static IBusinessService getService(String commandCode) {
        IBusinessService businessService = SERVICE_MAP.get(commandCode);
        if (null == businessService) {
            throw new AcpsBusinessException(ServiceErrorCode.TRANS_CODE_ERROR);
        }
        return businessService;
    }

    /**
     * 注册业务实现类
     *
     * @param code
     * @param businessService
     */
    public static void registerService(String code, IBusinessService businessService) {
        SERVICE_MAP.put(code, businessService);
    }
}


/**
 * 主业务接口
 */
public interface IBusinessService {

    /**
     * 业务执行方法
     *
     * @return
     */
    ResponseMsg doExecute(RequestMsg requestMsg) throws Exception;


}


/**
 * 主业务抽象类
 */
@Slf4j
public abstract class AbstractBusinessServiceImpl implements IBusinessService, InitializingBean {
    private static Validator validator = Validation.buildDefaultValidatorFactory().getValidator();

    /**
     * 获取指令代码
     *
     * @return
     */
    protected abstract String getCommandCode();

    /**
     * 执行方法
     * @return
     */
    @Override
    public ResponseMsg doExecute(RequestMsg requestMsg) throws Exception {
        throw new AcpsBusinessException(ServiceErrorCode.RESPONSE_CODE_ILLEGAL_DATA);
    }

    protected void validateParam(Object object)  {
        Set<ConstraintViolation<Object>> constraintViolations = validator.validate(object);
        Iterator<ConstraintViolation<Object>> iterator = constraintViolations.iterator();
        if (iterator.hasNext()) {
            throw new AcpsBusinessException(ServiceErrorCode.REQUEST_PARAM_ILLEGAL_DATA.getCode(), iterator.next().getMessage());
        }

    }

    protected <T> RequestMsg<T> validBody(RequestMsg requestMsg, Class<T> aClass){
        RequestMsg<T> req = JSONUtils.parseGenerics(JSONUtils.toJSONString(requestMsg), RequestMsg.class, aClass);
        validateParam(req.getBody());
        return req;
    }

}


/**
 * 具体业务实现类
 */
@Slf4j
@Service
public class BizCommandConsumeServiceImpl extends AbstractBusinessServiceImpl implements InitializingBean {

	@Override
    public ResponseMsg doExecute(RequestMsg requestMsg) throws Exception {
		//业务实现代码	
		return ResponseMsg;
	}	
	
	@Override
    public void afterPropertiesSet() throws Exception {
        BusinessFactory.registerService(getCommandCode(), this);
    }

    @Override
    protected String getCommandCode() {
        return TransCode.J00002.getCode();
    }
		
}