>1. Store your cart in session, and when that all works. For everyone. >Gets to the checkout and funds are exchanged.
While I agree with the previous posters who said that it would make your life easier if you can require login, if you absolutely need to save carts of users regardless of login status, you might consider having your Cart object impelment javax.servlet.http.HttpSessionBindingListener. Objects implementing this interface are notified when they are bound to or unbound from (either explicitly or by the session itself expiring/invalidated) a session, and can perform tasks at these times. In your case, when your Cart object is unbound you would save its contents to your database. (Conversely, when you first bind a Cart object to a session, you can check the database and refresh its contents, if any.) Nothing about this approach prohibits you from saving Cart information at other appropriate times -- user logins, purchases, and the like -- this approach just allows you the ability to store information, like cart contents, at the end of a client session. -Greg --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
