Shared memory or session

Question

Hi all,
my problem is , I need to store a file contents in the memory or a session, and this session or memory block can be accessed by all the other sessions (clients).
is this applicable in java ? , I am on a dedicated tomcat env.

Answer 1

public class ServletA extends HttpServlet
    public void doGet(....)
        List myList = new ArrayList();
        // Stores the List into application scope.
        getServletContext().setAttribute("MyKey", myList);
public class ServletB extends HttpServlet
    public void doGet(....)
        // Retrieves the List from application scope.
        List list = (List)(getServletContext().getAttribute("MyKey"));
}