JDBC Type 4 Driver Programmer's Reference

Connection and Statement Pooling
The Type 4 driver supports all interfaces required for WLS 8.1 connection pooling and
statement pooling. A WLS 8.1 JDBC sample is provided with the Type 4 driver product for
demonstrating connection pooling and integration.
WLS8.1 implements the connection pooling component. The WLS8.1 application server
maintains the cache of pooled objects, and retrieves an object when the client requests a
connection.
When the application is finished using the connection object, that object is returned to the pool