在多线程环境中从DB获取旧数据的spring jpa crud存储库

// 实体类
@Entity
@Table(name = "your_table_name")
public class YourEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // 其他属性和对应的getter/setter方法
}

// 存储库接口
public interface YourRepository extends JpaRepository<YourEntity, Long> {
    // 其他自定义查询方法
}

// 存储库实现类
@Repository
public class YourRepositoryImpl implements YourRepository {
    @Autowired
    private EntityManager entityManager;

    @Override
    @Transactional(readOnly = true)
    public YourEntity findById(Long id) {
        return entityManager.find(YourEntity.class, id);
    }
}

// 服务类
@Service
public class YourService {
    @Autowired
    private YourRepository yourRepository;

    @Async
    public CompletableFuture<YourEntity> getOldData(Long id) {
        return CompletableFuture.completedFuture(yourRepository.findById(id));
    }
}

// 控制器类
@RestController
public class YourController {
    @Autowired
    private YourService yourService;

    @GetMapping("/old-data/{id}")
    public CompletableFuture<YourEntity> getOldData(@PathVariable Long id) {
        return yourService.getOldData(id);
    }
}