This book is for Java developers who want to design and develop scalable and robust RESTful web services with the Java APIs. Contents are structured by keeping an eye on real life use cases from the RESTful API world and their solutions. Although the JAX-RS API solves many of the common RESTful web service use cases, some solutions are yet to be standardized as JAX-RS APIs. Keeping this in mind, a chapter is dedicated in this book for discussing extension APIs, which takes you beyond JAX-RS. This book also discusses the best practices and design guidelines for your REST APIs. In a nutshell, you will find this book useful while dealing with many real life use cases, such as dynamic resource configuration, message broadcasting with the server-sent event, HATEOAS, and so on.