refactor: 엔티티 빌더에 대해 private 접근 제어자 추가 (#215)

* refactor: 엔티티 빌더에 비공개 접근제어자 추가

* fix: 리프레시 토큰에 대한 정적 팩토리 메서드 추가

src/main/java/com/gdschongik/gdsc/domain/auth/application/JwtService.java

@@ -33,11 +33,9 @@ public RefreshTokenDto createRefreshToken(Long memberId) {
     }
 
     private void saveRefreshTokenToRedis(RefreshTokenDto refreshTokenDto) {
-        RefreshToken refreshToken = RefreshToken.builder()
-                .memberId(refreshTokenDto.memberId())
-                .token(refreshTokenDto.tokenValue())
-                .ttl(refreshTokenDto.ttl())
-                .build();
+        RefreshToken refreshToken =
+                RefreshToken.create(refreshTokenDto.memberId(), refreshTokenDto.tokenValue(), refreshTokenDto.ttl());
+
         refreshTokenRepository.save(refreshToken);
     }
 

src/main/java/com/gdschongik/gdsc/domain/auth/domain/RefreshToken.java

@@ -1,5 +1,6 @@
 package com.gdschongik.gdsc.domain.auth.domain;
 
+import lombok.AccessLevel;
 import lombok.Builder;
 import lombok.Getter;
 import org.springframework.data.annotation.Id;
@@ -18,10 +19,14 @@ public class RefreshToken {
     @TimeToLive
     private long ttl;
 
-    @Builder
-    public RefreshToken(Long memberId, String token, long ttl) {
+    @Builder(access = AccessLevel.PRIVATE)
+    private RefreshToken(Long memberId, String token, long ttl) {
         this.memberId = memberId;
         this.token = token;
         this.ttl = ttl;
     }
+
+    public static RefreshToken create(Long memberId, String token, long ttl) {
+        return RefreshToken.builder().memberId(memberId).token(token).ttl(ttl).build();
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/discord/domain/DiscordVerificationCode.java

@@ -2,6 +2,7 @@
 
 import com.gdschongik.gdsc.global.exception.CustomException;
 import com.gdschongik.gdsc.global.exception.ErrorCode;
+import lombok.AccessLevel;
 import lombok.Builder;
 import lombok.Getter;
 import org.springframework.data.annotation.Id;
@@ -23,7 +24,7 @@ public class DiscordVerificationCode {
     @TimeToLive
     private Long ttl;
 
-    @Builder
+    @Builder(access = AccessLevel.PRIVATE)
     private DiscordVerificationCode(String discordUsername, Integer code, Long ttl) {
         validateCodeRange(code);
         this.discordUsername = discordUsername;