Yesudason Paulraj wrote:
>
> We are retriving a Vector of X objects as a result of a query and
> displaying to the front end thru servlets. At the same time , we support
> the sorting functionality in such a way that , whenever the user clicks on
> the headers in the front end. So whenever this sorting is needed we dont
> want to contact the server and just want to sort accordingly the result (
> vector of X Objects) . Now the problem , I face is where to keep this
> vector object in such a way that , whenever user clicks anyone of the
> header , I can just manipulate the result and show it to the users again
> and so on.
>
> The one option , what I thought was , I can keep the Vector within the
> HTTP session (user's session)...But it is not a good idea keep such heavy
> objects in the session , keeping in mind that the number of clients may
> grow upto 2000 at a time.
How much data will be stored? If the query returns a small number of
rows (10-20 rows?), and the data is relatively small, say a few hundred
bytes per row, then you would probably be okay to store that in the
session. But do you really want to cause the user to send a request to
the servlet when they want to sort the results? I dislike web pages that
send a server requests when I'm not expecting it.
This might be a situation where you consider using an applet for your
user interface. A JTable would provide the functionality you need. On
the other hand, this solution has problems of its own:
- Instead of storing many references to objects in the server, you must
serialize and transfer those objects to the applet
- If this is intended for general release, you won't be able to
guarantee that the clients will have the Swing classes loaded in their
client browser
K MUkhar
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