I am trying to use the long session approach to implement application transaction, so my question is how can I reload an obejct asociated with that session:

class 1{
...
session.save(order);
session.disconnect();
request.getSession().setAttribute("longSession", session) ;
.....
}

class 2 {
...
Session session = (Session) request.getSession().getAttribute("longSession") ;
session.reconnect();
// how to get order object again?
// something like session.getObject(order,orderId) or something?
session.flush();
session.close();
request.getSession().removeAttribute("longSession") ;
......
}

Any idea?

session.refresh?

session.refresh()
throws an exception because the row doesn't exist yet in the DB.
I am trying with:
in class 2

Item item = (Item) session.get(Item.class, serializedId);

it seems to work, i will let you know soon.

I mean
Order class instead Item
Order order = (Order) session.get(Order.class, serializedId)

Just to complete the idea, it is worknig now, just use get in class 2 and it will work.
Thanks
Luis