“common application of thread confinement is the use of pooled JDBC (Java Database Connectivity) Connection objects. The JDBC specification does not require that Connection objects be thread-safe.[9] In typical server applications, a thread acquires a connection from the pool, uses it for processing a single request, and returns it. Since most requests, such as servlet requests or EJB (Enterprise JavaBeans) calls, are processed synchronously by a single thread, and the pool will not dispense the same connection to another thread until it has been returned, this pattern of connection management implicitly confines the Connection to that thread for the duration of the request. [9]”