Legacy Servlet to JSF

Question

Hi,
I am writing an application in JSF that will replace another Java Servlet but perform the same functions. The first step is to establish the front page in JSF with all the options, but link to the legacy servlet for all those options, and replace them one by one until the legacy servlet is gone.
I would like to run both applications in seperate containers, and use HTTP to redirect back and forth. Problem is, I don't know how to tell the legacy servlet to use the sessionid it has already established.
The first time I call to the legacy servlet, it will create a session, and I can acquire the sessionid from HttpSession.getSessionId(), then pass that back (somehow, haven't figured out yet how to call into the JSF servlet either). But once that has been done, I can provide that sessionid in any legacy servlet invocation.
Is this simple to do? How would I go about it?
The next problem I have is securing this transmission, which would probably entail encryption. Perhaps I should just be running these two servlets in the same context and avoid all this confusion.
Ideas?
Thanks for any suggestions.

Answer 1

Hi,
Before starting the very first JSF page (and before
the JSF front controller is invoked) I must use a
servlet to read some parameters, init some objects
and then jump to the first JSF page. Some objects
that the bean generates must be saved in a JSF
managed bean.
The question is, how can I set those parameters in
the managed bean if it wasn�t still initialised ?
Code like this:
ApplicationFactory factory = (ApplicationFactory)
FactoryFinder.getFactory(FactoryFinder.APPLICATION_FAC
TORY);
Application app = factory.getApplication();
ValueBinding vb =
app.createValueBinding("#{AManagedBean}");
AManagedBean mb=  (AManagedBean)
vb.getValue(FacesContext.getCurrentInstance());     Fails with a null pointer exception (it seems to not
t be finding �AmanagedBean�).
you didn't even set the value, thats why you are getting a "null pointer exception". Try
vb.setValue(FacesContext.getCurrentInstance(), AManagedBean)
>
Do you know how to set the properties in the
s in the managed bean ? Any comment or help would be
really welcome.
First set any properties of the "AmanagedBean" and then create the value binding in any of the scopes(request, seesion, application)
>
Thanks in advance,
     - Juan