[jboss-user] [JBoss Seam] - Re: @Begin and @End

[Holger Prause]

"gavin.king at jboss.com" wrote : If you really _have_ to have transparent lazy fetching of data off of the user, combined with caching of that data then create a session-scoped managed persistence context.
  | 
  | There are a couple of ways to do this, but the easiest is to use Seam 1.1 CVS build and throw the following in components.xml:
  | 
  | <component name="userDatabase" 
  |   |         scope="session"
  |   |         class="org.jboss.seam.core.ManagedPersistenceContext">
  |   |     <property name="persistenceUnitJndiName">java:/myEntityManagerFactory</property>
  |   | </component>
  |   | 
  | 
  | Hello, i want to use the approache mentionend above but i have some questions regarding this.
  | 
  | 1)
  | What does "myEntityManagerFactory" means in this context, is that the value of the "jboss.entity.manager.factory.jndi.name" property described in my persistence.xml ?
  | 
  | 
  |   | <property name="persistenceUnitJndiName">java:/myEntityManagerFactory</property>
  |   | 
  | 
  | 2) how can i use this(java side)?
  | 
  | Should i use
  | 
  | @PersistenceContext
  | private EntityManager em;
  | 
  | or (adepting your example nr1)
  | 
  | @In(create=true) 
  | private EntityManager userDatabase;
  | 
  | 
  | Thank u very much,
  | 
  | Holger

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