In this chapter, you learned how deployment works within Java EE and standalone Servlet 3.x containers as well as in environments that are JAX-RS aware. We also looked at some portable ways to configure your JAX-RS applications. Finally, you saw how you can portably integrate with EJB and Spring. Chapter 28 will allow you to test-drive some of the concepts presented in this chapter. It will walk you through the deployment of a full application that integrates with EJB, Spring, and Java Persistence (JPA).