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Serlvets DB connection pool optimal implementation?  RSS feed

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I've created a pool class (DBPool) to create the connection pool (Tomcat). This class is then initialized by the ServletContextListener class.

It might be good to know that my web system got several servlets, each of them containing up to maybe 20 db queries.

My question is, where should I create the connection?
1. In the beginning of each servlet (in the doPost/doGet section).
Then passing on the conn to each method containing the actual db queries.
One connection will then be used for the entire request, no matter then number of db queries performed.
But where should I close the connection?
2. Before each db query.
Then it will be easy to close the connection. But then loads of connections from the pool will be got and closed for each request.
3. Some other implementation


Consider Paul's rocket mass heater.
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