Defining the IDL state type

The IDL state type is a structure that must hold all the session data for the bean. The following IDL module shows example types used for a shopping cart component:

module TheCart
{
  // This is the state type, an IDL structure that holds customer data 
  // and the collection (sequence) of items in the cart.
  struct CartState
  {
    string name;
    string address;
    string phone;
    ::TheCart::ShoppingCartItems items;
  };

  // "ShoppingCartItems" is the sequence to hold items in the cart:
  typedef sequence < ::TestInMemoryFailvoer::ShoppingCartItem > ShoppingCartItems;

  // "ShoppingCartItem" holds the data for one item in the cart:
  struct ShoppingCartItem
  {
    string item;
    long quantity;
  }
}