java - Spring @Transactional 注释不起作用

Question

我正在尝试在以下方法中运行 entityManager.merge(myEntity) 但似乎忽略了 @Transactional 注释。 Hibernate 配置似乎很好，因为我可以成功地从数据库中获取数据，但无法写入数据库。我正在使用 Spring 3.2.3 版。为什么写入数据库操作不起作用？

我的方法不起作用

package  com.reflections.importer.bls;
...

@Service
class BlsGovImporter {

...

    @Transactional
    private void importSeries(String externalId) {
        // This works. The dao is using EntityManager too
        Series series = seriesDao.findByExternalId(externalId);

        series.getValues().addAll(fetchNewValues());

        // This does not work and no exception is thrown 
        entityManager.merge(series);
    }

Answer 1

因为它用于私有(private)方法。 Spring Docs :

Method visibility and @Transactional

When using proxies, you should apply the @Transactional annotation only to methods with public visibility. If you do annotate protected, private or package-visible methods with the @Transactional annotation, no error is raised, but the annotated method does not exhibit the configured transactional settings. Consider the use of AspectJ (see below) if you need to annotate non-public methods.

当它是私有(private)的时，它显然是从同一个类中调用的。但是 Spring 调用需要通过代理才能使其正常工作。因此，需要从另一个 bean 调用该方法。

其他选项是使用@Transactional 注释类。