关于扩展点基类优化建议

[barryShec]

1.除了通过注解上获取biz,userCase,sence, 也可以通过重载getBizScenario 方法来获取 ，
代码改造如下
public void doRegistration(ExtensionPointI extensionObject) {
Class<?> extensionClz = extensionObject.getClass();
if (AopUtils.isAopProxy(extensionObject)) {
extensionClz = AopUtils.getTargetClass(extensionObject);
}
Extension extensionAnn = AnnotatedElementUtils.findMergedAnnotation(extensionClz, Extension.class);

    BizScenario bizScenario = BizScenario.valueOf(extensionAnn.bizId(), extensionAnn.useCase(), extensionAnn.scenario());
    if (Objects.nonNull(extensionObject.getBizScenario())) {
        bizScenario=extensionObject.getBizScenario();
    }
    ExtensionCoordinate extensionCoordinate = new ExtensionCoordinate(calculateExtensionPoint(extensionClz), bizScenario.getUniqueIdentity());
    ExtensionPointI preVal = extensionRepository.getExtensionRepo().put(extensionCoordinate, extensionObject);
    if (preVal != null) {
        String errMessage = "Duplicate registration is not allowed for :" + extensionCoordinate;
        throw new ExtensionException(EXTENSION_DEFINE_DUPLICATE, errMessage);
    }
}

public interface ExtensionPointI {
default BizScenario getBizScenario(){
return null;
}
}

2.定义抽象BaseScenario，通过枚举类实现 BaseScenario,实现枚举场景类绑定扩展点，调用方代码如下，调用逻辑更加清晰哪个场景调用哪个方法
VerfiyServiceFeeRateScenarioEnum verfiyServiceFeeRateScenarioEnum =VerfiyServiceFeeRateScenarioEnum.fromCode(qry.getBusinessType()
.getCode());
verfiyServiceFeeRateScenarioEnum.executeVoid(vt -> vt.verifyAccountServiceFeeRate(qry));

public interface BaseScenario {

 String BIZ = "extension-biz";


 /**
  * 业务标识
  * @return
  */
 default String getBizId(){
      return LBIZ;
 }

 /**
  * 获取泛型实际的类型
  * @return
  */
 default Class<T> getActualType() {
      ParameterizedType parameterizedType = (ParameterizedType) this.getClass().getGenericInterfaces()[0];
      return (Class<T>) parameterizedType.getActualTypeArguments()[0];
 }

 /**
  * 自动根据枚举类生成场景
  * @return
  */
 default BizScenario bizScenarioOf() {
      BizScenario bizScenario = BizScenario.valueOf(getBizId(),this.getClass().getName(),
              this.toString());
      return bizScenario;
 }

 /**
  * 执行没有返回值的方法
  * @param exeFunction
  */

 default void executeVoid(Consumer<T> exeFunction) {
      ExtensionExecutor extensionExecutor = SpringContextUtil.getBean(ExtensionExecutor.class);
      BizScenario bizScenario = this.bizScenarioOf();
      ExtensionCoordinate extensionCoordinate = ExtensionCoordinate.valueOf(getActualType(),
              bizScenario);
      extensionExecutor.executeVoid(extensionCoordinate, exeFunction);
 }

 /**

public enum VerfiyServiceFeeRateScenarioEnum implements BaseScenario {

CITY_CARRIER(3, "test"),
BUSINESS(4, "tes2"),
SECONDARY_CARRIER(5, "test3");

private Integer code;

private String desc;


VerfiyServiceFeeRateScenarioEnum(Integer code, String desc) {
    this.code = code;
    this.desc = desc;
}


public static VerfiyServiceFeeRateScenarioEnum fromCode(Integer code) {
    return Arrays.stream(values())
                 .filter(o -> Objects.equals(code, o.getCode()))
                 .findFirst()
                 .orElseThrow(ExceptionHelper.supplyIllegalArgumentException("Illegal Value of JobListTabEnum: %s",
                                                                             code));
}