How to create a Spring session scoped bean based on user properties

Question

I've developed a Spring Web-MVC application. I have some offices in my project. Each user belongs to an office. user.getOfficeType() returns an integer representing the user's office type. If the office type is 1, the user belongs to Office1 and etc. However I want to inject the authenticated user's office into my service classes:

class MyService{
   @Autowired
   Office currentOffice;
   ...
}

I read the Spring docs. I need a session scoped bean to inject it into my service classes.

applicationContext.xml:

<mvc:annotation-driven />
<tx:annotation-driven transaction-manager="hibernateTransactionManager"/>
<context:annotation-config />
<context:component-scan base-package="com.package.controller" />
<context:component-scan base-package="com.package.service" />
...
<bean id="office" class="com.package.beans.Office" scope="session">
    <aop:scoped-proxy/>
</bean>

I have three implementations of the Office interface. Once a user requests a resource, I want to be aware of his Office. So I need to inject his session-scoped Office into my service classes. But I don't know how to instantiate it according to the user's office. please help!

No, It is an entity. I can access it by `SecurityContextHolder.getContext().getAuthentication()` — Dariush Jafari, Oct 16 '15 at 15:39

score 4 · Accepted Answer · answered Oct 16 '15 at 15:47

I found a solution! I declared an OfficeContext that wraps the Office and also implements it.

@Component
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public class OfficeContext implements InitializingBean, Office {

   private Office office;

   @Autowired
   private UserDao userDao;

   @Autowired
   private NoneOffice noneOffice;
   @Autowired
   private AllOffice allOffice;
   @Autowired
   private TariffOffice tariffOffice;
   @Autowired
   private ArzeshOffice arzeshOffice;

    public Office getOffice() {
       return this.office;
    }

   @Override
   public void afterPropertiesSet() throws Exception {
      Authentication auth = SecurityContextHolder.getContext().getAuthentication();
       if (auth.isAuthenticated()) {
           String name = auth.getName(); //get logged in username
           JUser user = userDao.findByUsername(name);
           if (user != null) {
               this.office = noneOffice;
           } else {
               OfficeType type = user.getOfficeType();
               switch (type) {
                   case ALL:
                       this.office = allOffice;
                       break;
                   case TARIFF:
                       this.office = tariffOffice;
                       break;
                   case ARZESH:
                       this.office = arzeshOffice;
                       break;
                   default:
                       this.office = noneOffice;
               }
           }
       } else {
           this.office = noneOffice;
       }

   }

   @Override
   public OfficeType getType() {
       return office.getType();
   }

   @Override
   public String getDisplayName() {
       return office.getDisplayName();
   }

}

and in my service classes I injected the OfficeContext.

@Service
public class UserService {

   @Autowired
   UserDao userDao;

   @Autowired
   OfficeContext office;

   public void persist(JUser user) {
       userDao.persist(user);
   }

   public void save(JUser user) {
       userDao.save(user);
   }


}

Ravi MCA · Answer 2 · 2020-06-01T09:57:58.037

I'm just throwing a different approach

@Configuration
public class SessionScopeBeansConfig {

    @Bean
    @SessionScope(proxyMode = ScopedProxyMode.TARGET_CLASS)
    public User user( UserDAO userDAO ) {

        return userDAO.getUserByLoginName( SecurityContextHolder.getContext().getAuthentication().getName() );
    }


    @Bean
    @SessionScope(proxyMode = ScopedProxyMode.TARGET_CLASS)
    public Office office( User user ) {

        Office office = <<Code to initialize office>>;

        return office;
    }
}

This way it's possible to directly inject the Office

class MyService{
   @Autowired
   Office currentOffice;
   ...
}

How to create a Spring session scoped bean based on user properties

2 Answers2