القائمة
Spring Boot'ta entity tasarımı, ilişkiler, sorgu optimizasyonu, transaction'lar, auditing, indeksleme, sayfalama ve pooling için JPA/Hibernate kalıpları.
| name | jpa-patterns |
| description | Spring Boot'ta entity tasarımı, ilişkiler, sorgu optimizasyonu, transaction'lar, auditing, indeksleme, sayfalama ve pooling için JPA/Hibernate kalıpları. |
| origin | ECC |
Spring Boot'ta veri modelleme, repository'ler ve performans ayarlaması için kullanın.
@Entity
@Table(name = "markets", indexes = {
@Index(name = "idx_markets_slug", columnList = "slug", unique = true)
})
@EntityListeners(AuditingEntityListener.class)
public class MarketEntity {
@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(nullable = false, length = 200)
private String name;
@Column(nullable = false, unique = true, length = 120)
private String slug;
@Enumerated(EnumType.STRING)
private MarketStatus status = MarketStatus.ACTIVE;
@CreatedDate private Instant createdAt;
@LastModifiedDate private Instant updatedAt;
}
Auditing'i etkinleştir:
@Configuration
@EnableJpaAuditing
class JpaConfig {}
@OneToMany(mappedBy = "market", cascade = CascadeType.ALL, orphanRemoval = true)
private List<PositionEntity> positions = new ArrayList<>();
JOIN FETCH kullanEAGER kullanmaktan kaçın; okuma yolları için DTO projections kullan@Query("select m from MarketEntity m left join fetch m.positions where m.id = :id")
Optional<MarketEntity> findWithPositions(@Param("id") Long id);
public interface MarketRepository extends JpaRepository<MarketEntity, Long> {
Optional<MarketEntity> findBySlug(String slug);
@Query("select m from MarketEntity m where m.status = :status")
Page<MarketEntity> findByStatus(@Param("status") MarketStatus status, Pageable pageable);
}
public interface MarketSummary {
Long getId();
String getName();
MarketStatus getStatus();
}
Page<MarketSummary> findAllBy(Pageable pageable);
@Transactional ile işaretle@Transactional(readOnly = true) kullan@Transactional
public Market updateStatus(Long id, MarketStatus status) {
MarketEntity entity = repo.findById(id)
.orElseThrow(() -> new EntityNotFoundException("Market"));
entity.setStatus(status);
return Market.from(entity);
}
PageRequest page = PageRequest.of(pageNumber, pageSize, Sort.by("createdAt").descending());
Page<MarketEntity> markets = repo.findByStatus(MarketStatus.ACTIVE, page);
Cursor benzeri sayfalama için, sıralama ile birlikte JPQL'de id > :lastId ekle.
status, slug, foreign key'ler)status, created_at)select * kullanmaktan kaçın; sadece gerekli sütunları project etsaveAll ve hibernate.jdbc.batch_size ile yazmaları batch'leÖnerilen özellikler:
spring.datasource.hikari.maximum-pool-size=20
spring.datasource.hikari.minimum-idle=5
spring.datasource.hikari.connection-timeout=30000
spring.datasource.hikari.validation-timeout=5000
PostgreSQL LOB işleme için ekle:
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
@DataJpaTest tercih etlogging.level.org.hibernate.SQL=DEBUG ve logging.level.org.hibernate.orm.jdbc.bind=TRACE ayarlaHatırla: Entity'leri yalın, sorguları kasıtlı ve transaction'ları kısa tut. Fetch stratejileri ve projections ile N+1'i önle, ve okuma/yazma yolların için indeksle.
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