refact : 검색 API ES 대신 임시 코드로 대체 (#197)

- 우선은 검색어 자동완성 기능을 비활성화하고, 문제 검색 기능은 제목과 설명만 포함되도록 함
- ES 비활성화 테스트를 위한 임시방편이므로 추후 추가적인 작업 필요

Author: NCookies

src/main/java/org/ezcode/codetest/application/problem/dto/response/ProblemSearchResponse.java

@@ -2,6 +2,7 @@
 
 import java.util.List;
 
+import org.ezcode.codetest.domain.problem.model.entity.Problem;
 import org.ezcode.codetest.domain.problem.model.entity.ProblemSearchDocument;
 
 import lombok.Builder;
@@ -36,4 +37,17 @@ public static ProblemSearchResponse from(ProblemSearchDocument document) {
 			.score(document.getScore())
 			.build();
 	}
+
+	public static ProblemSearchResponse from(Problem problem) {
+		
+		return ProblemSearchResponse.builder()
+			.id(problem.getId())
+			.title(problem.getTitle())
+			.category(null)	// TODO: 카테고리 입력해줘야 함
+			.difficulty(problem.getDifficulty().getDifficulty())
+			.reference(problem.getReference().toString())
+			.description(problem.getDescription())
+			.score(problem.getScore())
+			.build();
+	}
 }

src/main/java/org/ezcode/codetest/application/problem/service/ProblemSearchService.java

@@ -1,15 +1,11 @@
 package org.ezcode.codetest.application.problem.service;
 
-import java.util.Collection;
 import java.util.List;
-import java.util.Optional;
 import java.util.Set;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 import org.ezcode.codetest.application.problem.dto.response.ProblemSearchResponse;
-import org.ezcode.codetest.domain.problem.model.entity.ProblemSearchDocument;
 import org.ezcode.codetest.domain.problem.service.ProblemSearchDomainService;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;
 
 import lombok.RequiredArgsConstructor;
@@ -20,48 +16,18 @@ public class ProblemSearchService {
 
 	private final ProblemSearchDomainService searchDomainService;
 
+	// Redis 캐시 적용 (Cache Name: suggestions, Key: keyword)
+	@Cacheable(value = "suggestions", key = "#keyword", unless = "#result.isEmpty()")
 	public Set<String> getProblemSuggestions(String keyword) {
 
-		return searchDomainService
-			.getSuggestionsByKeyword(keyword)
-			.stream()
-			.flatMap(doc -> {
-				Stream.Builder<String> searchedKeyword = Stream.builder();
-
-				Optional.ofNullable(doc.getTitle()).ifPresent(searchedKeyword::add);
-				Optional.ofNullable(doc.getReference())
-					.map(Enum::toString)
-					.ifPresent(searchedKeyword::add);
-				Optional.ofNullable(doc.getDifficulty())
-					.ifPresent(searchedKeyword::add);
-				Optional.ofNullable(doc.getDescription())
-					.ifPresent(searchedKeyword::add);
-				Optional.ofNullable(doc.getDifficultyEn())
-					.map(Enum::toString)
-					.ifPresent(searchedKeyword::add);
-				Optional.ofNullable(doc.getReferenceKor())
-					.ifPresent(searchedKeyword::add);
-
-				Optional.ofNullable(doc.getCategories())
-					.stream()
-					.flatMap(Collection::stream)
-					.forEach(searchedKeyword::add);
-
-				Optional.ofNullable(doc.getCategoriesKor())
-					.stream()
-					.flatMap(Collection::stream)
-					.forEach(searchedKeyword::add);
-
-				return searchedKeyword.build();
-			})
-			.map(String::toUpperCase)
-			.collect(Collectors.toSet());
+		return null;
 	}
 
 	public List<ProblemSearchResponse> getProblemSearchResult(String keyword) {
 
-		List<ProblemSearchDocument> results = searchDomainService.searchByKeywordMatch(keyword);
-
-		return results.stream().map(ProblemSearchResponse::from).toList();
+		return searchDomainService.searchByKeywordMatch(keyword)
+			.stream()
+			.map(ProblemSearchResponse::from)
+			.toList();
 	}
 }

src/main/java/org/ezcode/codetest/domain/problem/repository/ProblemSearchRepository.java

@@ -0,0 +1,11 @@
+package org.ezcode.codetest.domain.problem.repository;
+
+import java.util.List;
+
+import org.ezcode.codetest.domain.problem.model.entity.Problem;
+
+public interface ProblemSearchRepository {
+
+	// 검색용 (검색 전용 DTO 또는 엔티티 리턴)
+	List<Problem> searchProblems(String keyword);
+}

src/main/java/org/ezcode/codetest/domain/problem/service/ProblemSearchDomainService.java

@@ -1,10 +1,11 @@
 package org.ezcode.codetest.domain.problem.service;
 
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
-import org.ezcode.codetest.domain.problem.model.entity.ProblemSearchDocument;
-import org.ezcode.codetest.domain.problem.repository.ProblemDocumentRepository;
+import org.ezcode.codetest.domain.problem.model.entity.Problem;
+import org.ezcode.codetest.domain.problem.repository.ProblemSearchRepository;
 import org.springframework.stereotype.Service;
 
 import lombok.RequiredArgsConstructor;
@@ -13,15 +14,11 @@
 @RequiredArgsConstructor
 public class ProblemSearchDomainService {
 
-	private final ProblemDocumentRepository searchRepository;
+	// private final ProblemDocumentRepository searchRepository;
+	private final ProblemSearchRepository searchRepository;
 
-	public Set<ProblemSearchDocument> getSuggestionsByKeyword(String keyword) {
+	public List<Problem> searchByKeywordMatch(String keyword) {
 
-		return searchRepository.findDocumentContainingKeyword(keyword);
-	}
-
-	public List<ProblemSearchDocument> searchByKeywordMatch(String keyword) {
-
-		return searchRepository.findProblemsByKeyword(keyword);
+		return searchRepository.searchProblems(keyword);
 	}
 }

src/main/java/org/ezcode/codetest/infrastructure/persistence/repository/problem/ProblemSearchJpaRepository.java

@@ -0,0 +1,15 @@
+package org.ezcode.codetest.infrastructure.persistence.repository.problem;
+
+import java.util.List;
+
+import org.ezcode.codetest.domain.problem.model.entity.Problem;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+public interface ProblemSearchJpaRepository extends JpaRepository<Problem, Long> {
+
+	// TODO: FULLTEXT 인덱스 추가
+	@Query(value = "SELECT * FROM problem WHERE title LIKE CONCAT('%', :keyword, '%') OR description LIKE CONCAT('%', :keyword, '%')", nativeQuery = true)
+	List<Problem> searchByKeyword(@Param("keyword") String keyword);
+}

src/main/java/org/ezcode/codetest/infrastructure/persistence/repository/problem/ProblemSearchRepositoryImpl.java

@@ -0,0 +1,21 @@
+package org.ezcode.codetest.infrastructure.persistence.repository.problem;
+
+import java.util.List;
+
+import org.ezcode.codetest.domain.problem.model.entity.Problem;
+import org.ezcode.codetest.domain.problem.repository.ProblemSearchRepository;
+import org.springframework.stereotype.Repository;
+
+import lombok.RequiredArgsConstructor;
+
+@Repository
+@RequiredArgsConstructor
+public class ProblemSearchRepositoryImpl implements ProblemSearchRepository {
+
+	private final ProblemSearchJpaRepository searchJpaRepository;
+
+	@Override
+	public List<Problem> searchProblems(String keyword) {
+		return searchJpaRepository.searchByKeyword(keyword);
+	}
+}