How much data is actually sent to the client?

Hi,
On the web application stuff I'm doing, I have a somewhat complex class structure for my objects. For example: I have a Project class and a Concept class, and technically you can access a Project object's assocated Concept object, but to do so you'd have to access a chain of three associated classes. Right now if I want to display some information from the Concept object in a JSP, I have to access the Project object from the session and then call a cascade of four methods to get to it.
I was wondering if it'd make things simpler (and just easier to read) if I just set the Concept object in my session along side with the Project object that's already in the session. That made me worry about how much data is really being "stored." How much data is really being sent to the client? I know that JSP's are produced server side, so I'm guessing that the only thing sent to the user is the final rendered html/xml page. Is this correct? Do I have anything to consider when I decide what data put in the session?
Thanks for any help,
Will

I know
that JSP's are produced server side, so I'm guessing
that the only thing sent to the user is the final
rendered html/xml page. Is this correct? Do I have
anything to consider when I decide what data put in
the session?Yes, that is correct. Only the HTML (or whatever it is) that your JSP generates is sent to the client. (Except that the server may send a cookie too, but that's just a few bytes to identify the client.)
As for what to put in the session: Data in the session takes up memory space, but data not in the session will have to be recreated later if you need it again. It's the usual trade-off of the cost of caching data in memory versus the cost of reproducing that data.
(And if it wasn't obvious, don't put anything in the session if it is only being used to process the current request and response. Only put data in the session if it will be needed to process subsequent requests.)

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I am very sorry for the delay...
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How much data is actually sent to the client?

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