Java EJB、Hibernate、object.setProperty在服务中时自动保存
在我的项目中,我有这样的体系结构: 控制器->服务->存储库->数据库(oracle)Java EJB、Hibernate、object.setProperty在服务中时自动保存,java,hibernate,ejb,autocommit,Java,Hibernate,Ejb,Autocommit,在我的项目中,我有这样的体系结构: 控制器->服务->存储库->数据库(oracle) 控制器->查看规则 服务->业务规则 存储库->数据库规则 当我更改服务中对象的de属性时,我的项目将自动执行更新。这是错误的,因为我必须调用我的存储库来保存 我举一个例子: @RequestScoped @ApplicationScoped public class HomeController { //this is my controller private List<Banner>
@RequestScoped @ApplicationScoped
public class HomeController { //this is my controller
private List<Banner> banners;
@EJB
private IBannerService bannerService;
@PostConstruct
public void init() {
try {
this.banners = this.bannerService.buscarBanners(TipoBanner.HOME);
} catch (Exception e) {
e.printStackTrace();
loggerApp(ModuloTipo.PORTAL, LogTipo.ERROR, getNomeUsuarioLogado(), PortalAcaoLog.INIT_ERRO, "erro ao abrir home");
}
}
}
JPA EntityManager的默认行为是在其参与的任何事务结束时刷新和提交—无论是普通的PersistenceContext(您的案例)还是扩展的 此外,EJB的默认行为是在所有公共方法上都是事务性的(需要传播),这意味着如果不存在事务,它将创建事务 您的属性更改每次都会提交,因为您的BannerService(它是EJB)上每次都有一个事务
我建议在BannerService上用@TransactionAttribute(TransactionAttributeType.SUPPORTS)注释buscarBanners()方法非常感谢您。这解决了我的问题。我将进一步研究@TransactionAttribute
@Stateless(name = "BannerService")
@Remote(IBannerService.class)
public class BannerService implements IBannerService { //this is my service
@EJB
private IBannerRepository bannerRepository;
@Override
public List<Banner> buscarBanners(TipoBanner tipo) {
List<Banner> bannersLink = this.bannerRepository.buscarBanners(tipo);
for(Banner b : bannersLink) {
System.out.println(b.getDescricao());
b.setDescricao(b.getDescricao() + " - this is a test"); //when i do this, automatically save my object 0.o... i don`t now what is happening.
}
return bannersLink;
}
@Override
public void salvar(Banner banner) {
this.bannerRepository.update(banner); //when i want to save, i call this method
}
}
@Stateless(name = "BannerRepository")
@Local(IBannerRepository.class)
public class BannerRepository implements IBannerRepository {
@PersistenceContext
private EntityManager entityManager;
@Override
public void update(Object object) {
this.entityManager.merge(object);
}
}