is pooling a viable option when servlets are used

[Monarch Bhojani]

Hello all
I am designing a chat application in JSP and servlets.Now I have completed the general chat room and users are able to talk and it works fine
Now I have designed a one to one chat in which right now i am able to open a window of the other user by clicking on the name of the user

Now how should i proceed further for the message storing and the delivery of the message to the intended client . Is servlet a good option or should i opt for something else?

It is not a socket one so please suggest me a viable solution so that the message could be stored and delivered without delay

Thanks
Regards
Monarch