Is this possible? -- The servlet itselt has to update all its clients.

Hi,
I need to update the values of clients pages , when ever a request to the servlet arrives.
namely the servlet has to update all its client's HTML pages,when ever a new request is sent from any one of its clients.
for an example.
consider the value of a variable A in servlet is 1, initially
Three pages[b] m1,m2,and m3 are accessing that servlet
and value of[b] A is displayed in m1,m2 and m3
if m1 calls the servlet and updates the value of A to 2.
Then this updation has to be reflected in m2 and m3 also.
This must not be done by the clients,by refreshing itselt, or by sending a request to the servlet at certain intervals.
The servlet itselt has to update all its clients.
Regards
-John-

Not having used pushlets myself, but having heard about them many times before, I took a look at the article.
Interesting. It never closes the connection to the client, so can keep sending additional info. It seems to solve the problem of updating the page. But at what cost?
When does the "updating" of the page stop?
How do you know if the user is still alive?
How many "listeners" will it be able to handle at one time?
Would the users session expire if they left it on this pushlet page?

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Is this possible? -- The servlet itselt has to update all its clients.

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