2 Replies Latest reply on Sep 11, 2007 5:46 AM by Pete Muir

    LazyInitialization and ScopeType.SESSION question

    Przemysław Wojewódka Newbie

      Let's say I have entity class that is also seam component named "account":


      @Scope(ScopeType.SESSION)
      @Name("account")
      @Entity
      public class Account implements Serializable{
       private Long id;
       private Collection<Operation> operations;
       ...
      }


      During log in operation I read user account object from db and outjected under name "currentAccount":

      @Name("authenticator")
      public class Authenticator {
      
      @Out(required=false, scope=ScopeType.SESSION, value="currentAccount")
       private Account account;
      
       public boolean authenticate() {
       account = getUserAccountFromDB();
       }
       ...
      
      }


      Now I want to use currentAccount object in diffrent manager(plain pojo), for instance:
      @Name("someManager")
      public class SomeManager () {
       @In Account currentAccount;
      
       public void doSth() {
       for (Operation operation:currentAccount.getOperations()) {
       log.debug(operation);
       }
       }
      }


      And now currentAccount.getOperations() will cause org.hibernate.LazyInitializationException the same if I try use use sth like #{currentAccount.operations} directly in view.

      I came across :
      http://www.jboss.com/index.html?module=bb&op=viewtopic&t=85964

      where Gavin King posted that It's neccesary to reattach detached object (scoped SESSION) using session.lock() to make it valid to conversation context.

      And now my qustions:
      1. Do I really have to do this "reattach" in every bean that uses SESSION scoped seam components?
      2. If I use many views that displays SESSION scoped objects (complex lazy initialization) I have to make them EAGER ??? (imagine there is outjection at the begginig and then only views that uses SESSION scoped components - no other beans)
      3. Why @In does not make this "attach" automatically?

      I'm just at the begging of seam developing process and maybe I miss some important point? ;)

      Many thanks in advance