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Apache Commons DBCP
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"Many Jakarta projects support interaction with a relational database. Creating
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a new connection for each user can be time consuming (often requiring multiple
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seconds of clock time), in order to perform a database transaction that might
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take milliseconds. Opening a connection per user can be unfeasible in a
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publicly-hosted Internet application where the number of simultaneous users can
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be very large. Accordingly, developers often wish to share a "pool" of open
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connections between all of the application's current users. The number of users
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actually performing a request at any given time is usually a very small
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percentage of the total number of active users, and during request processing
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is the only time that a database connection is required. The application itself
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logs into the DBMS, and handles any user account issues internally.
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There are several Database Connection Pools already available, both within
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Jakarta products and elsewhere. This Commons package provides an opportunity to
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coordinate the efforts required to create and maintain an efficient,
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feature-rich package under the ASF license."
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For more information:
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http://commons.apache.org/dbcp/
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