title: Play framework How to reconcile Stateless with Session & Cache
body: <p>I'm novice in Play framework,</p>
  
  <p>We said that Play 2 is fully RESTful - there is no Java EE session per connection.
  However, we can save data in different ways: Session, Flash or Cache!</p>
  
  <p>Does not exist any contradiction?! or I misunderstood things?!</p>
  
  <p>Could someone explain to me?</p>