feat(home): 팔로잉 탭 최근 소식 정책을 보강한다

src/main/kotlin/kr/co/vividnext/sodalive/member/MemberService.kt

@@ -497,12 +497,14 @@ class MemberService(
     fun creatorFollow(creatorId: Long, isNotify: Boolean, isActive: Boolean, memberId: Long) {
         if (creatorId == memberId) return
 
-        val creatorFollowing = creatorFollowingRepository.findByCreatorIdAndMemberId(
+        val creatorFollowing = creatorFollowingRepository.findByCreatorIdAndMemberIdForUpdate(
             creatorId = creatorId,
             memberId = memberId
         )
 
         if (creatorFollowing == null) {
+            if (!isActive) return
+
             val creator = repository.findByIdOrNull(creatorId)
                 ?: throw SodaException(messageKey = "member.validation.creator_not_found")
             val member = repository.findByIdOrNull(memberId)
@@ -515,12 +517,15 @@ class MemberService(
         } else {
             creatorFollowing.isNotify = isNotify && isActive
             creatorFollowing.isActive = isActive
+            if (!isActive) {
+                homeFollowingNewsInboxPort.deactivateByMemberIdAndCreatorId(memberId = memberId, creatorId = creatorId)
+            }
         }
     }
 
     @Transactional
     fun creatorUnFollow(creatorId: Long, memberId: Long) {
-        val creatorFollowing = creatorFollowingRepository.findByCreatorIdAndMemberId(
+        val creatorFollowing = creatorFollowingRepository.findByCreatorIdAndMemberIdForUpdate(
             creatorId = creatorId,
             memberId = memberId
         )

src/main/kotlin/kr/co/vividnext/sodalive/member/following/CreatorFollowingRepository.kt

@@ -4,12 +4,14 @@ import com.querydsl.jpa.impl.JPAQueryFactory
 import kr.co.vividnext.sodalive.member.following.QCreatorFollowing.creatorFollowing
 import org.springframework.data.jpa.repository.JpaRepository
 import org.springframework.stereotype.Repository
+import javax.persistence.LockModeType
 
 @Repository
 interface CreatorFollowingRepository : JpaRepository<CreatorFollowing, Long>, CreatorFollowingQueryRepository
 
 interface CreatorFollowingQueryRepository {
     fun findByCreatorIdAndMemberId(creatorId: Long, memberId: Long): CreatorFollowing?
+    fun findByCreatorIdAndMemberIdForUpdate(creatorId: Long, memberId: Long): CreatorFollowing?
 }
 
 @Repository
@@ -25,4 +27,15 @@ class CreatorFollowingQueryRepositoryImpl(
             )
             .fetchFirst()
     }
+
+    override fun findByCreatorIdAndMemberIdForUpdate(creatorId: Long, memberId: Long): CreatorFollowing? {
+        return queryFactory
+            .selectFrom(creatorFollowing)
+            .where(
+                creatorFollowing.creator.id.eq(creatorId)
+                    .and(creatorFollowing.member.id.eq(memberId))
+            )
+            .setLockMode(LockModeType.PESSIMISTIC_WRITE)
+            .fetchFirst()
+    }
 }