채팅방 제목 생성 AI 서버 연동

src/main/java/com/sofa/linkiving/LinkivingApplication.java

@@ -7,7 +7,7 @@
 
 @SpringBootApplication
 @EnableJpaAuditing
-@EnableFeignClients(basePackages = "com.sofa.linkiving.infra.feign")
+@EnableFeignClients
 public class LinkivingApplication {
 
 	public static void main(String[] args) {

src/main/java/com/sofa/linkiving/domain/chat/ai/MockAiTitleClient.java → src/main/java/com/sofa/linkiving/domain/chat/ai/MockTitleClient.java

@@ -1,13 +1,13 @@
 package com.sofa.linkiving.domain.chat.ai;
 
-import org.springframework.context.annotation.Primary;
+import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Component;
 
 @Component
-@Primary
-public class MockAiTitleClient implements AiTitleClient {
+@Profile("test")
+public class MockTitleClient implements TitleClient {
 	@Override
-	public String generateSummary(String firstChat) {
+	public String generateTitle(String firstChat) {
 		return String.format("임시 제목[%s]", firstChat);
 	}
 }

src/main/java/com/sofa/linkiving/domain/chat/ai/RagTitleClient.java

@@ -0,0 +1,46 @@
+package com.sofa.linkiving.domain.chat.ai;
+
+import java.util.List;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+import com.sofa.linkiving.domain.chat.dto.request.TitleGenerateReq;
+import com.sofa.linkiving.domain.chat.dto.response.TitleGenerateRes;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Component
+@Slf4j
+@Profile("!test")
+@RequiredArgsConstructor
+public class RagTitleClient implements TitleClient {
+
+	private static final int MAX_TITLE_LENGTH = 100;
+	private final RagTitleFeign ragTitleFeign;
+
+	@Override
+	public String generateTitle(String firstChat) {
+		try {
+			List<TitleGenerateRes> response = ragTitleFeign.generateTitle(new TitleGenerateReq(firstChat));
+
+			if (response == null || response.isEmpty()) {
+				return truncateTitle(firstChat);
+			}
+
+			return response.get(0).title();
+
+		} catch (Exception e) {
+			log.error("AI 서버 통신 실패. 기본 제목으로 대체합니다. error={}", e.getMessage());
+			return truncateTitle(firstChat);
+		}
+	}
+
+	private String truncateTitle(String originalTitle) {
+		if (originalTitle.length() <= MAX_TITLE_LENGTH) {
+			return originalTitle;
+		}
+		return originalTitle.substring(0, MAX_TITLE_LENGTH);
+	}
+}

src/main/java/com/sofa/linkiving/domain/chat/ai/RagTitleFeign.java

@@ -0,0 +1,17 @@
+package com.sofa.linkiving.domain.chat.ai;
+
+import java.util.List;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+import com.sofa.linkiving.domain.chat.dto.request.TitleGenerateReq;
+import com.sofa.linkiving.domain.chat.dto.response.TitleGenerateRes;
+import com.sofa.linkiving.infra.feign.GlobalFeignConfig;
+
+@FeignClient(name = "ai-title-client", url = "${ai.server.url}", configuration = GlobalFeignConfig.class)
+public interface RagTitleFeign {
+	@PostMapping("/webhook/title-generate")
+	List<TitleGenerateRes> generateTitle(@RequestBody TitleGenerateReq request);
+}

src/main/java/com/sofa/linkiving/domain/chat/ai/TitleClient.java

@@ -0,0 +1,10 @@
+package com.sofa.linkiving.domain.chat.ai;
+
+public interface TitleClient {
+	/**
+	 * AI 서버에 첫 채팅 내용을 토대로 채팅방 제목 생성 요청을 보냅니다.
+	 * @param firstChat 채팅 시작 대화
+	 * @return 제목
+	 */
+	String generateTitle(String firstChat);
+}

src/main/java/com/sofa/linkiving/domain/chat/dto/request/TitleGenerateReq.java

@@ -0,0 +1,6 @@
+package com.sofa.linkiving.domain.chat.dto.request;
+
+public record TitleGenerateReq(
+	String firstMessage
+) {
+}

src/main/java/com/sofa/linkiving/domain/chat/dto/response/TitleGenerateRes.java

@@ -0,0 +1,6 @@
+package com.sofa.linkiving.domain.chat.dto.response;
+
+public record TitleGenerateRes(
+	String title
+) {
+}

src/main/java/com/sofa/linkiving/domain/chat/facade/ChatFacade.java

@@ -5,7 +5,7 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import com.sofa.linkiving.domain.chat.ai.AiTitleClient;
+import com.sofa.linkiving.domain.chat.ai.TitleClient;
 import com.sofa.linkiving.domain.chat.dto.internal.MessagesDto;
 import com.sofa.linkiving.domain.chat.dto.response.ChatsRes;
 import com.sofa.linkiving.domain.chat.dto.response.CreateChatRes;
@@ -25,7 +25,7 @@ public class ChatFacade {
 	private final ChatService chatService;
 	private final MessageService messageService;
 	private final FeedbackService feedbackService;
-	private final AiTitleClient aiTitleClient;
+	private final TitleClient titleClient;
 
 	public MessagesRes getMessages(Member member, Long chatId, Long lastId, int size) {
 		Chat chat = chatService.getChat(chatId, member);
@@ -35,7 +35,7 @@ public MessagesRes getMessages(Member member, Long chatId, Long lastId, int size
 
 	@Transactional
 	public CreateChatRes createChat(String firstChat, Member member) {
-		String title = aiTitleClient.generateSummary(firstChat);
+		String title = titleClient.generateTitle(firstChat);
 		Chat chat = chatService.createChat(title, member);
 
 		return CreateChatRes.from(chat, firstChat);

src/test/java/com/sofa/linkiving/domain/chat/ai/RagTitleClientTest.java

@@ -0,0 +1,96 @@
+package com.sofa.linkiving.domain.chat.ai;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.BDDMockito.*;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import com.sofa.linkiving.domain.chat.dto.request.TitleGenerateReq;
+import com.sofa.linkiving.domain.chat.dto.response.TitleGenerateRes;
+
+@ExtendWith(MockitoExtension.class)
+public class RagTitleClientTest {
+
+	@InjectMocks
+	private RagTitleClient ragTitleClient;
+
+	@Mock
+	private RagTitleFeign ragTitleFeign;
+
+	@Test
+	@DisplayName("AI 서버 통신 성공 시 생성된 제목을 반환한다")
+	void shouldReturnGeneratedTitleWhenApiCallSucceeds() {
+		// given
+		String firstChat = "안녕하세요";
+		String generatedTitle = "인사말";
+
+		TitleGenerateRes resDto = mock(TitleGenerateRes.class);
+		given(resDto.title()).willReturn(generatedTitle);
+
+		given(ragTitleFeign.generateTitle(any(TitleGenerateReq.class)))
+			.willReturn(List.of(resDto));
+
+		// when
+		String result = ragTitleClient.generateTitle(firstChat);
+
+		// then
+		assertThat(result).isEqualTo(generatedTitle);
+		verify(ragTitleFeign).generateTitle(any(TitleGenerateReq.class));
+	}
+
+	@Test
+	@DisplayName("AI 서버 응답이 빈 리스트일 경우 요청한 첫 메시지(firstChat)를 그대로 반환한다")
+	void shouldReturnFirstChatWhenResponseIsEmpty() {
+		// given
+		String firstChat = "안녕하세요";
+
+		given(ragTitleFeign.generateTitle(any(TitleGenerateReq.class)))
+			.willReturn(Collections.emptyList());
+
+		// when
+		String result = ragTitleClient.generateTitle(firstChat);
+
+		// then
+		assertThat(result).isEqualTo(firstChat);
+	}
+
+	@Test
+	@DisplayName("AI 서버 응답이 null일 경우 요청한 첫 메시지(firstChat)를 그대로 반환한다")
+	void shouldReturnFirstChatWhenResponseIsNull() {
+		// given
+		String firstChat = "안녕하세요";
+
+		given(ragTitleFeign.generateTitle(any(TitleGenerateReq.class)))
+			.willReturn(null);
+
+		// when
+		String result = ragTitleClient.generateTitle(firstChat);
+
+		// then
+		assertThat(result).isEqualTo(firstChat);
+	}
+
+	@Test
+	@DisplayName("AI 서버 통신 중 예외 발생 시 로그를 남기고 첫 메시지(firstChat)를 그대로 반환한다")
+	void shouldReturnFirstChatWhenExceptionOccurs() {
+		// given
+		String firstChat = "안녕하세요";
+
+		given(ragTitleFeign.generateTitle(any(TitleGenerateReq.class)))
+			.willThrow(new RuntimeException("API Connection Failed"));
+
+		// when
+		String result = ragTitleClient.generateTitle(firstChat);
+
+		// then
+		assertThat(result).isEqualTo(firstChat);
+	}
+}

src/test/java/com/sofa/linkiving/domain/chat/facade/ChatFacadeTest.java

@@ -13,7 +13,7 @@
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
-import com.sofa.linkiving.domain.chat.ai.AiTitleClient;
+import com.sofa.linkiving.domain.chat.ai.TitleClient;
 import com.sofa.linkiving.domain.chat.dto.internal.MessagesDto;
 import com.sofa.linkiving.domain.chat.dto.response.ChatsRes;
 import com.sofa.linkiving.domain.chat.dto.response.CreateChatRes;
@@ -39,7 +39,7 @@ public class ChatFacadeTest {
 	private FeedbackService feedbackService;
 
 	@Mock
-	private AiTitleClient aiTitleClient;
+	private TitleClient titleClient;
 
 	@Mock
 	private Member member;
@@ -105,7 +105,7 @@ void shouldReturnCreateChatResWhenCreateChat() {
 		given(mockChat.getId()).willReturn(chatId);
 		given(mockChat.getTitle()).willReturn(generatedTitle);
 
-		given(aiTitleClient.generateSummary(firstChat)).willReturn(generatedTitle);
+		given(titleClient.generateTitle(firstChat)).willReturn(generatedTitle);
 		given(chatService.createChat(generatedTitle, member)).willReturn(mockChat);
 
 		// when

src/test/java/com/sofa/linkiving/domain/chat/integration/ChatApiIntegrationTest.java

@@ -22,7 +22,7 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.sofa.linkiving.domain.chat.ai.AiTitleClient;
+import com.sofa.linkiving.domain.chat.ai.TitleClient;
 import com.sofa.linkiving.domain.chat.dto.request.CreateChatReq;
 import com.sofa.linkiving.domain.chat.dto.response.MessageRes;
 import com.sofa.linkiving.domain.chat.dto.response.MessagesRes;
@@ -73,7 +73,7 @@ public class ChatApiIntegrationTest {
 	private SummaryRepository summaryRepository;
 
 	@Autowired
-	private AiTitleClient aiTitleClient;
+	private TitleClient titleClient;
 
 	@Autowired
 	private ChatFacade chatFacade;
@@ -186,7 +186,7 @@ void shouldCreateChatSuccessfullyWhenValidRequest() throws Exception {
 		// given
 		String firstChatContent = "AI 관련 최신 뉴스 알려줘";
 		CreateChatReq req = new CreateChatReq(firstChatContent);
-		String title = aiTitleClient.generateSummary(firstChatContent);
+		String title = titleClient.generateTitle(firstChatContent);
 
 		// when & then
 		mockMvc.perform(post(BASE_URL)
@@ -248,6 +248,7 @@ void shouldReturnChatListWhenGetChats() throws Exception {
 			.title("Chat 2")
 			.build());
 
+		// 생성 시간 차이를 두기 위해 잠시 대기 (정렬 테스트)
 		Thread.sleep(10);
 
 		Chat chat1 = chatRepository.save(Chat.builder()