We have serveral options:
1.Use a stateful session enterprise javabean.
----Your hosting provider should have a full J2EE server with an EJB Container.
2.Use a database
-----Your hosting provider does allow access to MySQL.You could write the client's data to a database.But this is nearly as much of a runtime performance hit as an enterprise bean would be.
3.Use an HttpSession
-----We can use an HttpSession object to hold the conversational state across multiple requests .In other words ,for an entire session with that client.
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