[jboss-user] [JBoss Seam] - Re: Abstract components, EL and auto-instantiation

[petemuir]

I would suggest using a manager component:

@Name("currentUser")
  | @Scope(SESSION)
  | @Stateful
  | public class CurrentUserManagerBean implements CurrentUserManager {
  | 
  |    private User currentUser;
  | 
  |    @Create
  |    public void create() {
  |       // Initialise the user e.g. get username from JAAS, load user from Persistence Context
  |       currentUser = ...;
  |    }
  | 
  |    @Unwrap
  |    public User unwrap() {
  |       return currentUser;
  |    }
  | 
  | }

Alternatively you could make the manager stateful and do all the work in @Unwrap,

@Name("currentUser")
  | @Stateless
  | public class CurrentUserManagerBean implements CurrentUserManager {
  |  
  |    @Unwrap
  |    public User unwrap() {
  |        // Initialise the user e.g. get username from JAAS, load user from Persistence Context
  |       User currentUser = em.find(User.class, username);
  |       return currentUser;
  |    }
  | 
  | }


or implement a @Factory manager pattern.


@Name("currentUserManager")
  | @Stateless
  | public class CurrentUserManagerBean implements CurrentUserManager {
  |  
  |    @Factory("currentUser")
  |    public User unwrap() {
  |        // Initialise the user e.g. get username from JAAS, load user from Persistence Context
  |       User currentUser = em.find(User.class, username);
  |       return currentUser;
  |    }
  | 
  | }

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