Hi all,
I need help understanding and implementing the Model-2 Architecture advocated by folks
like Craig.
What I would really like someone to describe is the how, and more importantly the
where of implementing the Model-2 Architecture. I'll attempt to describe a
"HelloWorld-ish" application I created to use Model-2 techniques as I understand them.
Let's say I have a jsp page called userinfo.jsp. userinfo.jsp exist in a folder called
myapp on the root of my webserver. So it would be accessed like
http://servername/myapp/userinfo.jsp. Now, I have two Java classes: StoreUser, which
is the "controller" servlet and UserBean which is a Bean which holds info entered in
the form on userinfo.jsp. Finally, I have another jsp page called showinfo.jsp whose
purpose in life is to display info. stored in the UserBean.
Now, userinfo.jsp "calls" the StoreUser servlet(<FORM action="/myapp/StoreUser">).
StoreUser creates a session, a UserBean, and attempts to store the UserBean in the
session. Then StoreUser forwards the request to showinfo.jsp--
RequestDispatcher rd=getServletContext().getRequestDispatcher("/myapp/showinfo.jsp");
Next, in showinfo.jsp I have the following at the top of showinfo.jsp:
<%@ page session="true" import="learn.UserBean" %>
<jsp:useBean id="idBean" scope="session" class="learn.UserBean" />
Finally in showinfo.jsp I have a line like:
<%= idBean.getUserID() %>
I mapped /myapp/StoreUser to the StoreUser servlet, which exist in directory structure
of my servlet container, JRun.
I'm sure I've done a number of things incorrectly, but my biggest source of confusion
is how do I get the jsp files that exists under the directory structure of my
webserver to know about the session created by the StoreUser servlet which exist under
the directory structure of JRun.
I simply don't know where to place all the directories and files so that they "share"
the same context, session, etc.
I would appreciate as much info./example code/example dir. structures as anyone is
willing to provide.
Thanks,
Greg
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