如何在Spring中有条件地配置transactionManager时使用事务性注释？

Question

对于条件sessionFactory beans，我将Autowired注释中的'required'参数设置为false，以防止spring抛出NoSuchBeanDefinitionException，但对于@Transactional我该怎么办？

配置类

    @Bean("archiveTransactionManager")
    @Conditional(ArchiveCondition.class)
    public HibernateTransactionManager archiveTransactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(archiveSessionFactory());
        return transactionManager;
    }

事务性方法

    @Transactional(value = "archiveTransactionManager", readOnly = true)
    private List<DocumentItem> loadArchivedDocumentItem() {...}

if(GeneralSetting.isArchive)
   documentService.loadArchivedDocumentItem();

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'archiveTransactionManager' available: No matching PlatformTransactionManager bean found for qualifier 'archiveTransactionManager' - neither qualifier match nor bean name match!

我希望spring跳过条件transactionManager bean在某些情况下对它们不是由条件创建的bean进行验证。

Answer 1

我实现了一个无操作的SessionFactory，并在禁用archive_mode时在spring配置类中实例化它：

SpringConfig.java

    @Bean("archiveSessionFactory")
    public SessionFactory archiveSessionFactory() {
        return ServerConf.ARCHIVE_MODE ? createNormalSessionFactory() : new DummySessionFactory();
    }

    @Bean("archiveTransactionManager")
    public HibernateTransactionManager archiveTransactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(archiveSessionFactory());
        return transactionManager;
    }

dummySessionFactory.java

public class DummySessionFactory implements SessionFactory {
...
    // These two methods call in spring initializing and we have to implement them
    @Override
    public Metamodel getMetamodel() {
       return new MetamodelImpl(null);
    }

    @Override
    public Map<String, Object> getProperties() {
       return null;
    }

    //Throw suitable exception in other methods
    @Override
    public Session getCurrentSession() throws HibernateException {
        throw new HibernateException("Desired mode is Disabled");
    }
...
}