Problem exchanging values between a Servlet and Thread???

Hi Everybody,
I have got a problem exchanging values between a Servlet and a Thread...
The actual thing will go like this
I take a request from JSP which is served by a servlet..
A thread is invoked in the servlets into which the parameter values taken from JSP page is sent...
In between the thread needs to be suspended for a moment, relieve the control back to the servlet and then come back with the new values modified in the servlet...
How is this achieved?
Please give ur suggestions regarding this...
Thanks in advance

I really have no clue how you can use URLConnection to do that!
Could you please explain in the following scenario how it can help me as an alternative solution to the following:
Non-Servlet A continously running & saving to some prop regularly
--> servlet B reads prop file regularly --> display continously on a jsp file
I wish I could do a servlet A --> servlet B-- > display jsp scenario but I do not know how to have servlet A continously running while keep the servlet B interacting with the jsp.

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