GWT includes an extensive RPC framework to let your GWT applications communicate using standard Java objects over the network. This framework is powerful and useful, but with great power comes great responsibility. Java persistence, Java 5 generics and annotations, data transfer of business objects, object graph pruning, and message ordering can all affect your APIs and your apps. In this session, Rob Jellinghaus discusses best practices that address these issues and others, to enable you to use GWT RPC effectively.