feat: 도메인 정보 갱신 영속성 로직 구현

src/main/java/com/seong/shoutlink/domain/domain/repository/DomainEntity.java

@@ -0,0 +1,41 @@
+package com.seong.shoutlink.domain.domain.repository;
+
+import com.seong.shoutlink.domain.common.BaseEntity;
+import com.seong.shoutlink.domain.domain.Domain;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@Entity
+@Table(name = "domain")
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class DomainEntity extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long domainId;
+    private String rootDomain;
+
+    public DomainEntity(String rootDomain) {
+        this(null, rootDomain);
+    }
+
+    public DomainEntity(Long domainId, String rootDomain) {
+        this.domainId = domainId;
+        this.rootDomain = rootDomain;
+    }
+
+    public static DomainEntity create(Domain domain) {
+        return new DomainEntity(domain.getRootDomain());
+    }
+
+    public Domain toDomain() {
+        return new Domain(domainId, rootDomain);
+    }
+}

src/main/java/com/seong/shoutlink/domain/domain/repository/DomainJpaRepository.java

@@ -0,0 +1,9 @@
+package com.seong.shoutlink.domain.domain.repository;
+
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface DomainJpaRepository extends JpaRepository<DomainEntity, Long> {
+
+    Optional<DomainEntity> findByRootDomain(String rootDomain);
+}

src/main/java/com/seong/shoutlink/domain/domain/repository/DomainRepositoryImpl.java

@@ -0,0 +1,26 @@
+package com.seong.shoutlink.domain.domain.repository;
+
+import com.seong.shoutlink.domain.domain.Domain;
+import com.seong.shoutlink.domain.domain.service.DomainRepository;
+import java.util.Optional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+
+@Repository
+@RequiredArgsConstructor
+public class DomainRepositoryImpl implements DomainRepository {
+
+    private final DomainJpaRepository domainJpaRepository;
+
+    @Override
+    public Optional<Domain> findByRootDomain(String rootDomain) {
+        return domainJpaRepository.findByRootDomain(rootDomain)
+            .map(DomainEntity::toDomain);
+    }
+
+    @Override
+    public Domain save(Domain domain) {
+        return domainJpaRepository.save(DomainEntity.create(domain))
+            .toDomain();
+    }
+}

src/main/java/com/seong/shoutlink/domain/link/repository/LinkEntity.java

@@ -1,6 +1,7 @@
 package com.seong.shoutlink.domain.link.repository;
 
 import com.seong.shoutlink.domain.common.BaseEntity;
+import com.seong.shoutlink.domain.domain.Domain;
 import com.seong.shoutlink.domain.link.Link;
 import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
 import com.seong.shoutlink.domain.linkbundle.LinkBundle;
@@ -26,6 +27,7 @@ public class LinkEntity extends BaseEntity {
     private String url;
     private String description;
     private Long linkBundleId;
+    private Long domainId;
 
     private LinkEntity(String url, String description, Long linkBundleId) {
         this.url = url;
@@ -45,4 +47,8 @@ public static LinkEntity create(LinkWithLinkBundle linkWithLinkBundle) {
     public Link toDomain() {
         return new Link(linkId, url, description);
     }
+
+    public void updateDomainId(Domain domain) {
+        domainId = domain.getDomainId();
+    }
 }

src/main/java/com/seong/shoutlink/domain/link/repository/LinkRepositoryImpl.java

@@ -43,7 +43,8 @@ public LinkPaginationResult findLinks(
 
     @Override
     public void updateLinkDomain(Link link, Domain domain) {
-
+        linkJpaRepository.findById(link.getLinkId())
+            .ifPresent(linkEntity -> linkEntity.updateDomainId(domain));
     }
 
     @Override