Multiple users on portlets with individual static info

Hi,
I have created several portlets on a page that takes a user's preference, and then renders the different portlets according to the user's specifications. For example, when a user visit the page, it would ask the user if they prefer the texts to be red or blue, and if they want the font sizes to be 10px or 12px on each portlet. However, if I use static variables in a class to track the user's "preference", and if another user decides to view the same page at the same time, it would result in the page rendering according to the first user's "preference".
Does anyone here have any suggestion on how to store a user's "preference" statically for EACH individual user that visits the same page with different portlets?
I guess I'm trying to accomplish something similar to a shopping cart at an online store: What is the best way to store the items an individual user has put in the basket and not have it mixed up with other visitors to the site?
Any help would be much appreciated.
Thanks!
Edited by: SirAlmon on Jun 20, 2008 5:58 AM

Do you want the information for the user to be there when they come back another day? If not then the user's session will work or a cookie. If the info is desired for extended periods then you have to choose a persistent data store for the information. A database, a properties file on the server (XML is frequently used), or persistent cookies.
Static is the wrong way to go. Static means one value for the entire application. So the last person to set the value will be the one everyone sees.
The session is a great and convenient way to track a user while they are on your site. It is also a easy way to get yourself into trouble. Use it judiciously.

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