应用场景:存在银行卡和社保卡的支付、退货等接口,接口报文中使用transWay表示银行卡(0)和社保卡(1),transType表示支付(1)、退货(2)。那么由其组合便能出现四个逻辑,所以要实现动态的逻辑分发。
@Data
public class PosApiReq {
/** 交易方式 **/
private String transWay;
/** 交易类型 **/
private String transType;
}
public interface ICommonService {
public Object handler(String json);
}
@Service
@CodeType("01")
public class BankConsumService implements ICommonService{
@Override
public Object handler(String json) {
System.out.println("银行卡消费开始:" + json);
return "bank-consum";
}
}
@Service
@CodeType("02")
public class BankRefundService implements ICommonService{
@Override
public Object handler(String json) {
System.out.println("银行卡退货开始:" + json);
return "bank-refund";
}
}
@Service
@CodeType("11")
public class SocConsumService implements ICommonService{
@Override
public Object handler(String json) {
System.out.println("社保卡消费开始:" + json);
return "soc-consum";
}
}
@Service
@CodeType("12")
public class SocRefundService implements ICommonService{
@Override
public Object handler(String json) {
System.out.println("社保卡退货开始:" + json);
return "soc-refund";
}
}
@RestController
public class ServerController {
private final Map<String, ICommonService> handlerMap = new HashMap<>();
@Autowired
private void setHandler(List<ICommonService> commonServiceList) {
for (ICommonService commonService : commonServiceList) {
handlerMap.put(commonService.getClass().getAnnotation(CodeType.class).value(), commonService);
}
}
@Anonymous
@RequestMapping("/api")
public Object api(@RequestBody PosApiReq posApiReq) {
String transWay = posApiReq.getTransWay();
String transType = posApiReq.getTransType();
// 01 银行卡消费、02银行卡退货、11 社保卡消费、 12社保卡退货
String value = transWay+transType;
ICommonService commonService = handlerMap.get(value);
Object object = commonService.handler(posApiReq.toString());
return object;
}
}
@Target(value={ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface CodeType {
String value();
}
此方式完美的解决了根据不通交易调用不通逻辑的问题,如果新添加一类交易,只需要扩展实现ICommonService 接口的新类就可以。