A pooling DataSource appropriate for deployment within J2EE environment. There are many configuration options, most of which are defined in the parent class. All users (based on username) share a single maximum number of Connections in this datasource.
User passwords can be changed without re-initializing the datasource. When a getConnection(username, password) request is processed with a password that is different from those used to create connections in the pool associated with username, an attempt is made to create a new connection using the supplied password and if this succeeds, idle connections created using the old password are destroyed and new connections are created using the new password.
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