feature:#160 쿠폰 CRUD 추가 및 오류 수정

src/main/java/com/t3t/bookstoreapi/coupon/adapter/CouponAdapter.java

@@ -0,0 +1,47 @@
+package com.t3t.bookstoreapi.coupon.adapter;
+
+import com.t3t.bookstoreapi.coupon.client.CouponApiClient;
+import com.t3t.bookstoreapi.coupon.exception.CouponApiClientException;
+import com.t3t.bookstoreapi.coupon.model.response.CouponResponse;
+import com.t3t.bookstoreapi.model.response.BaseResponse;
+import feign.FeignException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+import java.util.Optional;
+
+@Component
+@RequiredArgsConstructor
+public class CouponAdapter {
+    private final CouponApiClient couponApiClient;
+
+    public CouponResponse getGeneralCoupon(){
+        try{
+            return Optional.ofNullable(couponApiClient.getGeneralCoupon().getBody())
+                    .map(BaseResponse::getData)
+                    .orElseThrow(CouponApiClientException::new);
+        }catch (FeignException e){
+            throw new CouponApiClientException();
+        }
+    }
+
+    public CouponResponse getBookCoupon(){
+        try{
+            return Optional.ofNullable(couponApiClient.getBookCoupon().getBody())
+                    .map(BaseResponse::getData)
+                    .orElseThrow(CouponApiClientException::new);
+        }catch (FeignException e){
+            throw new CouponApiClientException();
+        }
+    }
+
+    public CouponResponse getCategoryCOupon(){
+        try{
+            return Optional.ofNullable(couponApiClient.getCategoryCoupon().getBody())
+                    .map(BaseResponse::getData)
+                    .orElseThrow(CouponApiClientException::new);
+        }catch (FeignException e){
+            throw new CouponApiClientException();
+        }
+    }
+}

src/main/java/com/t3t/bookstoreapi/coupon/client/CouponApiClient.java

@@ -1,18 +1,19 @@
 package com.t3t.bookstoreapi.coupon.client;
 
+import com.t3t.bookstoreapi.coupon.model.response.CouponResponse;
+import com.t3t.bookstoreapi.model.response.BaseResponse;
 import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
 
 @FeignClient(name = "CouponApiClient", url = "${t3t.feignClient.url}")
 public interface CouponApiClient {
-    /*@GetMapping(value = "/t3t/coupon/categories/coupons")
-    ResponseEntity<BaseResponse<List<CategoryIdResponse>>> getCategoriesId();
+    @GetMapping("/t3t/coupon/coupons/book")
+    ResponseEntity<BaseResponse<CouponResponse>> getBookCoupon();
 
-    @GetMapping(value = "/t3t/bookstore/categories/{categoryId}/coupons")
-    ResponseEntity<BaseResponse<CategoryIdResponse>> getCategoryId(@PathVariable("categoryId") Integer categoryId);*/
+    @GetMapping("/t3t/coupon/coupons/category")
+    ResponseEntity<BaseResponse<CouponResponse>> getCategoryCoupon();
 
-    //todo 1 ) Gateway에서 쿠폰 등록
-
-    // todo 2 ) book coupon, category coupon, general coupon FeignClient 이용해 가져오기
-
-    // todo 3 ) 가져온 것 db에 넣어놓기
+    @GetMapping("/t3t/coupon/coupons/general")
+    ResponseEntity<BaseResponse<CouponResponse>> getGeneralCoupon();
 }

src/main/java/com/t3t/bookstoreapi/coupon/exception/CouponApiClientException.java

@@ -0,0 +1,11 @@
+package com.t3t.bookstoreapi.coupon.exception;
+
+public class CouponApiClientException extends RuntimeException{
+    private static final String DEFAULT_MESSAGES = "쿠폰을 가져오지 못했습니다";
+    public CouponApiClientException(String message) {
+        super(message);
+    }
+    public CouponApiClientException(){
+        super(DEFAULT_MESSAGES);
+    }
+}

src/main/java/com/t3t/bookstoreapi/coupon/model/response/CouponResponse.java

@@ -0,0 +1,12 @@
+package com.t3t.bookstoreapi.coupon.model.response;
+
+import lombok.*;
+
+@Builder
+@Getter@ToString
+@EqualsAndHashCode
+@NoArgsConstructor
+@AllArgsConstructor
+public class CouponResponse {
+    private String couponId;
+}

src/main/java/com/t3t/bookstoreapi/coupon/service/CouponDetailService.java

@@ -1,5 +1,7 @@
 package com.t3t.bookstoreapi.coupon.service;
 
+import com.t3t.bookstoreapi.coupon.adapter.CouponAdapter;
+import com.t3t.bookstoreapi.coupon.repository.CouponDetailRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -8,4 +10,10 @@
 @Transactional
 @RequiredArgsConstructor
 public class CouponDetailService {
+    private final CouponDetailRepository couponDetailRepository;
+    private final CouponAdapter couponAdapter;
+/*
+    public void saveCouponDetail(CouponDetailRequest request){
+
+    }*/
 }