Injecting entity from session for preUpdate

[francof]

I am still a newbie to Seam ...

I am using a POJO based seam-gen created application.

I have declared my User entity class like so

@Entity
@Table(name = "APPUSER", uniqueConstraints = @UniqueConstraint(columnNames = "USER_NAME"))
@Name("user")
@Role(name="currentUser", scope=ScopeType.SESSION)
public class User implements java.io.Serializable {
...
}

and in my authenticate method

       @Out(required = false, scope = SESSION)
        private User user;

The validated user instance is successfully stored in session scope as currentUser after authentication.

What I am trying to do is update audit columns for another entity called Burst managed by a EntityHome.

In Burst entity I have this

@PrePersist @PreUpdate
public void beforeSave() {
        System.out.println("Entering beforeSave method");
        
        User user = (User) Contexts.getSessionContext().get("currentUser");
                

        if ( getBurstId() == null ) {
                System.out.println("setting updates for new entity instance");
                //new instance 
                this.setAddedByUser(user);
                this.setModifiedByUser(user);
                this.dateCreated = new java.sql.Date(System.currentTimeMillis());
                this.dateModified = new java.sql.Date(System.currentTimeMillis());
        } else {
                System.out.println("setting updates for entity instance "+ getBurstName());
                this.setModifiedByUser(user);
                this.dateModified = new java.sql.Date(System.currentTimeMillis());
        }
}

This works but my questions are

Is this the right approach to update these values. Should
I have declared a EntityListener class instead to do this?

Secondly, if I were to inject
@(currentUser) into my Burst entity class, it gives me a null pointer - is that because Seam bijection does not work in a entity class ?

Can anyone share the right way to update these columns after a persist/update operation.

Thanks
Franco