AUTHOR BIO Christian Bauer is a member of the Hibernate developer team and he works as a trainer and consultant. Gavin King is the founder of the Hibernate project and a member of the original Java Persistence expert group (JSR 220). He also led the standardization effort of CDI (JSR 299). Gavin is currently creating a new programming language for business applications called Ceylon. Gary Gregory is a software engineer at Rocket Software working on application servers and legacy integration. He is the co-author of JUnit in Action and Spring Batch in Action, and a member of the project management committees for the Apache Software Foundation project Commons, Xalan and Logging Services.