我一直在用头撞墙一段时间,现在试图让它发挥作用。我创建了以下数据访问对象:
public interface GenericDAO<T, ID extends Serializable> {
T findById(ID id);
List<T> findAll();
T save(T entity);
void update(T entity);
void delete(T entity);
}
public class GenericHibernateDAO<T, ID extends Serializable> implements GenericDAO<T, ID> {
private final Class<T> persistentClass;
private final SessionFactory sessionFactory;
public GenericHibernateDAO(final SessionFactory sessionFactory) {
this.persistentClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
this.sessionFactory = sessionFactory;
}
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
public Class<T> getPersistentClass() {
return persistentClass;
}
@Override
public T findById(final ID id) {
return (T) getSession().load(getPersistentClass(), id);
}
@Override @SuppressWarnings("unchecked")
public List<T> findAll() {
return findByCriteria();
}
protected List<T> findByCriteria(final Criterion... criterion) {
final Criteria crit = getSession().createCriteria(getPersistentClass());
for (final Criterion c : criterion) {
crit.add(c);
}
return crit.list();
}
@Override
public T save(final T entity) {
getSession().saveOrUpdate(entity);
return entity;
}
@Override
public void delete(final T entity) {
getSession().delete(entity);
}
@Override
public void update(final T entity) {
getSession().saveOrUpdate(entity);
}
}
@Repository
public class StockHibernateDAO extends GenericHibernateDAO<Stock, String> implements StockDAO {
@Inject
public StockHibernateDAO(final SessionFactory sessionFactory) {
super(sessionFactory);
}
}
我正在尝试使用 Java 配置进行设置,所以这是我设置服务层的配置:
@Configuration @Profile("hibernate")
@EnableCaching @EnableTransactionManagement
@ComponentScan("reference.dao.hibernate")
public class HibernateServiceConfig implements TransactionManagementConfigurer {
@Inject private StockDAO stockDao; //No extra methods, just the base stuff for now
@Bean(destroyMethod = "shutdown")
public DataSource dataSource() {
return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.HSQL).addScript("classpath:schema.sql").build();
}
@Bean
public SessionFactory sessionFactory() {
return new LocalSessionFactoryBuilder(dataSource()).addAnnotatedClasses(Stock.class)
.setProperty("hibernate.show_sql", "true")
.setProperty("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.EhCacheRegionFactory")
.setProperty("hibernate.cache.use_query_cache", "true")
.setProperty("hibernate.cache.use_second_level_cache", "true")
.setProperty("hibernate.dialect", "org.hibernate.dialect.HSQLDialect").buildSessionFactory();
}
@Override @Bean
public PlatformTransactionManager annotationDrivenTransactionManager() {
return new HibernateTransactionManager(sessionFactory());
}
}
这是交易服务:
@Service
public class TradingServiceImpl implements TradingService {
@Inject private StockDAO stockDAO;
@Override @Transactional
@CachePut(value = "stockCache", key = "#stock.name")
public Stock addNewStock(final Stock stock) {
stockDAO.save(stock);
return stock;
}
@Override @Cacheable(value = "stockCache")
public Stock getStock(final String stockName) {
return stockDAO.findById(stockName);
}
@Override @CacheEvict(value = "stockCache", key = "#stock.name")
public void removeStock(final Stock stock) {
stockDAO.delete(stock);
}
@Override @CacheEvict(value = "stockCache", key = "#stock.name")
public void updateStock(final Stock stock) {
stockDAO.update(stock);
}
@Override
public List<Stock> getAll() {
return stockDAO.findAll();
}
}
仅当我将 session.flush() 添加到 save 方法时,股票的保存似乎才完成。我理解事物的方式,在服务层方法周围使用 TransactionManager 和 @Transactional 实际上应该会导致为我进行调用。这个配置缺少什么?