MyBatis+Spring - Retrieve VOs as "beans"

[Vladimir Alarcon]

My sqlSession.selectList() method is retrieving a list of VOs.

Do you guys know if it's possible for these VOs to be instantiated by
Spring? I would like them to be able to control Spring SQL
transactions.

So far my VOs look like:

@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class AccountVO {

@Autowired
private InvoiceController invoiceController;

}

When I run the SELECT using MyBatis+Spring, the returned AccountVO
"autowired properties" are not populated as I wished, but always null.

Any insight would be greatly appreciated.

Thanks in advance.
Vlad

[Iwao AVE!]

Hi Vlad,

I would like them to be able to control Spring SQL transactions.

I am not sure what that means, but it is possible to let MyBatis use Spring managed beans.

You need to create a custom ObjectFactory that looks up ApplicationContext.
The create method would look as follows.

public <T> T create(Class<T> type) {
  try {
    return applicationContext.getBean(type);
  } catch (NoSuchBeanDefinitionException e) {
    return delegate.create(type);
  }
}

delegate is an instance of DefaultObjectFactory.

Set this ObjectFactory to your SqlSessionFactoryBean.

@Bean
public SqlSessionFactoryBean sqlSessionFactory() {
  SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
  sessionFactory.setObjectFactory(new SpringBeanObjectFactory(applicationContext));
  ...

Here is an executable demo:
https://github.com/harawata/mybatis-issues/tree/master/ml-20190524T021118

Regards,
Iwao

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[Kazuki Shimizu]

Be careful a performance degradation when use the spring managed prototype bean.

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