In Better, Faster, Lighter Java authors Bruce Tate and Justin Gehtland argue that the old heavyweight architectures, such as WebLogic, JBoss, and WebSphere, are unwieldy, complicated, and contribute to slow and buggy application code. As an alternative, the authors present two "lightweight" open source architectures, Hibernate and Spring, that can help you create enterprise applications that are easier to maintain, write, and debug, and are ultimately much faster.