refactor: 엑셀 다운로드 따닥 방지

src/main/java/in/koreatech/koin/domain/coop/exception/DuplicateExcelRequestException.java

@@ -0,0 +1,22 @@
+package in.koreatech.koin.domain.coop.exception;
+
+import java.time.LocalDate;
+
+import in.koreatech.koin.global.exception.DuplicationException;
+
+public class DuplicateExcelRequestException extends DuplicationException {
+    private static final String DEFAULT_MESSAGE = "동일한 요청을 30초 안에 다시 보낼 수 없습니다!";
+
+    public DuplicateExcelRequestException(String message) {
+        super(message);
+    }
+
+    public DuplicateExcelRequestException(String message, String detail) {
+        super(message, detail);
+    }
+
+    public static DuplicateExcelRequestException withDetail(LocalDate startDate, LocalDate endDate) {
+        return new DuplicateExcelRequestException(DEFAULT_MESSAGE,
+            "startDate: '" + startDate + "'" + "endDate: " + endDate);
+    }
+}

src/main/java/in/koreatech/koin/domain/coop/model/ExcelDownloadCache.java

@@ -0,0 +1,36 @@
+package in.koreatech.koin.domain.coop.model;
+
+import java.util.concurrent.TimeUnit;
+
+import org.springframework.data.redis.core.RedisHash;
+import org.springframework.data.redis.core.TimeToLive;
+
+import jakarta.persistence.Id;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@RedisHash(value = "excelDownload")
+public class ExcelDownloadCache {
+
+    private static final long CACHE_EXPIRE_SECONDS = 30L;
+
+    @Id
+    private String id;
+
+    @TimeToLive(unit = TimeUnit.SECONDS)
+    private final Long expiration;
+
+    @Builder
+    private ExcelDownloadCache(String id, Long expiration) {
+        this.id = id;
+        this.expiration = expiration;
+    }
+
+    public static ExcelDownloadCache from(String id) {
+        return ExcelDownloadCache.builder()
+            .id(id)
+            .expiration(CACHE_EXPIRE_SECONDS)
+            .build();
+    }
+}

src/main/java/in/koreatech/koin/domain/coop/repository/ExcelDownloadCacheRepository.java

@@ -0,0 +1,16 @@
+package in.koreatech.koin.domain.coop.repository;
+
+import java.util.Optional;
+
+import org.springframework.data.repository.Repository;
+
+import in.koreatech.koin.domain.coop.model.ExcelDownloadCache;
+
+public interface ExcelDownloadCacheRepository extends Repository<ExcelDownloadCache, String> {
+
+    ExcelDownloadCache save(ExcelDownloadCache excelDownloadCache);
+
+    Optional<ExcelDownloadCache> findById(String id);
+
+    boolean existsById(String id);
+}

src/main/java/in/koreatech/koin/domain/coop/service/CoopService.java

@@ -36,14 +36,17 @@
 import in.koreatech.koin.domain.coop.dto.SoldOutRequest;
 import in.koreatech.koin.domain.coop.exception.DiningLimitDateException;
 import in.koreatech.koin.domain.coop.exception.DiningNowDateException;
+import in.koreatech.koin.domain.coop.exception.DuplicateExcelRequestException;
 import in.koreatech.koin.domain.coop.exception.StartDateAfterEndDateException;
 import in.koreatech.koin.domain.coop.model.Coop;
 import in.koreatech.koin.domain.coop.model.DiningImageUploadEvent;
 import in.koreatech.koin.domain.coop.model.DiningNotifyCache;
 import in.koreatech.koin.domain.coop.model.DiningSoldOutEvent;
+import in.koreatech.koin.domain.coop.model.ExcelDownloadCache;
 import in.koreatech.koin.domain.coop.repository.CoopRepository;
 import in.koreatech.koin.domain.coop.repository.DiningNotifyCacheRepository;
 import in.koreatech.koin.domain.coop.repository.DiningSoldOutCacheRepository;
+import in.koreatech.koin.domain.coop.repository.ExcelDownloadCacheRepository;
 import in.koreatech.koin.domain.coopshop.model.CoopShopType;
 import in.koreatech.koin.domain.coopshop.service.CoopShopService;
 import in.koreatech.koin.domain.dining.model.Dining;
@@ -65,6 +68,7 @@ public class CoopService {
     private final ApplicationEventPublisher eventPublisher;
     private final DiningRepository diningRepository;
     private final DiningSoldOutCacheRepository diningSoldOutCacheRepository;
+    private final ExcelDownloadCacheRepository excelDownloadCacheRepository;
     private final DiningNotifyCacheRepository diningNotifyCacheRepository;
     private final CoopRepository coopRepository;
     private final UserTokenRepository userTokenRepository;
@@ -166,6 +170,7 @@ public CoopLoginResponse coopLogin(CoopLoginRequest request) {
     }
 
     public ByteArrayInputStream generateDiningExcel(LocalDate startDate, LocalDate endDate, Boolean isCafeteria) {
+        checkDuplicateExcelRequest(startDate, endDate);
         validateDates(startDate, endDate);
         List<Dining> dinings = fetchDiningData(startDate, endDate, isCafeteria);
 
@@ -192,7 +197,6 @@ private void validateDates(LocalDate startDate, LocalDate endDate) {
         if (startDate.isAfter(today) || endDate.isAfter(today)) {
             throw new DiningNowDateException("오늘 날짜 이후 기간은 설정할 수 없어요.");
         }
-
         if (startDate.isAfter(endDate)) {
             throw new StartDateAfterEndDateException("시작일은 종료일 이전으로 설정해주세요.");
         }
@@ -265,10 +269,10 @@ private void fillDiningRow(Dining dining, Row row, CellStyle commonStyle) {
         row.createCell(6).setCellValue(Optional.ofNullable(dining.getSoldOut()).map(Object::toString).orElse(""));
         row.createCell(7).setCellValue(Optional.ofNullable(dining.getIsChanged()).map(Object::toString).orElse(""));
 
-            for (int i = 0; i < EXCEL_COLUMN_COUNT; i++) {
-                row.getCell(i).setCellStyle(commonStyle);
-            }
+        for (int i = 0; i < EXCEL_COLUMN_COUNT; i++) {
+            row.getCell(i).setCellStyle(commonStyle);
         }
+    }
 
     private String formatMenu(List<String> menu) {
         return String.join("\n", menu);
@@ -281,4 +285,13 @@ private ByteArrayInputStream writeWorkbookToStream(SXSSFWorkbook workbook) throw
             return new ByteArrayInputStream(out.toByteArray());
         }
     }
+
+    private void checkDuplicateExcelRequest(LocalDate startDate, LocalDate endDate) {
+        boolean isCacheExist = excelDownloadCacheRepository.existsById(startDate.toString() + endDate.toString());
+
+        if (isCacheExist) {
+            throw DuplicateExcelRequestException.withDetail(startDate, endDate);
+        }
+        excelDownloadCacheRepository.save(ExcelDownloadCache.from(startDate.toString() + endDate.toString()));
+    }
 }