SFSB not storing values?

[tsar_bomba]

I'm not sure what is wrong...but I can't get a Stateful bean to store any values!

I did a test using the example in the TrailBlazer app and got a SFSB to work just fine...but now that I'm trying one in my application I simply can't get it to retain any values I add into it.

It's really pretty simple. I have a ShoppingCartBean that has a globally declared collection of OrderLine objects:

@Stateful
public class ShoppingCartBean
 implements Serializable ,ShoppingCartLocal, ShoppingCartRemote
{
 private float orderTotal = 0F;
 private Order order = new Order();
 private List<OrderLine> orderLines = new ArrayList<OrderLine>();
 private Customer customer = new Customer();
 @EJB private ProductsLocal products;

 public ShoppingCartBean()
 {
 }

 @PostConstruct
 public void init()
 {
 System.out.println("ShoppingCartBean called, orderLines count: " + orderLines.size());
 }

 public Order getOrder()
 {
 return this.order;
 }

 public Customer getCustomer()
 {
 return this.customer;
 }

 public List<OrderLine> getOrderLines()
 {
 return this.orderLines;
 }

 public int getItemCount()
 {
 return this.orderLines.size();
 }

 public boolean containsItem(OrderLine item)
 {
 return orderLines.contains(item);
 }

 public void addOrderLine(OrderLine item)
 {
 this.orderLines.add(item);
 System.out.println("addOrderLine called, orderLines count: " + orderLines.size());
 }

 public void removeOrderLine(OrderLine orderLine)
 {
 this.orderLines.remove(orderLine);
 }

 public float getOrderTotal()
 {
 return this.orderTotal;
 }

 @Remove
 public void checkout()
 {
 System.out.println("To be implemented");
 }
}

I created a test servlet where I add a value and then display the contents of the collection:

 public void doGet(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException
 {
 response.setContentType("text/html");
 response.getWriter().println("SFSBTest!<br />");

 try
 {
 InitialContext ctx = new InitialContext();
 ShoppingCart cart = (ShoppingCart)ctx.lookup("MyEAR/ShoppingCartBean/local");

 OrderLine ol = new OrderLine();
 ol.setQuantity(1);

 //add to cart SFSB
 cart.addOrderLine(ol);

 List<OrderLine> lines = cart.getOrderLines();

 for (OrderLine line : lines)
 {
 response.getWriter().println(line.getQuantity() + "<br />");
 }
 }
 catch (NamingException exp)
 {
 exp.printStackTrace();
 }
 catch (IOException exp)
 {
 exp.printStackTrace();
 }
 }

...instead...I see only the one object I'm adding...nothing new gets appended. The List is losing its contents rather than retaining and appending a new value on every refresh.

You'll see that I put out.println statements in the "add" and "get" methods in the SFSB for the collection so I could see what was happening while it ran.

Here's the output I see while refreshing:

20:15:39,418 INFO [STDOUT] ShoppingCartBean called, orderLines count: 0
20:15:39,418 INFO [STDOUT] addOrderLine called, orderLines count: 1

Did I forget something? What's going on? Am I misunderstanding how Stateful beans work?

Thanks!

[bdecoste]

Every refresh is doing another SFSB JNDI lookup - this is giving you a new instance of the SFSB each time.