Chapter 1, Getting Started, gives a brief note regarding the new features that have been introduced in JAX-RS 2.0, such as client API, filters and interceptors, and client-side and server-side asynchronous. It also contains some other prominent features, such as listing of modules and dependencies that are used for implementing JAX-RS 2.0.

Chapter 2, Server API, covers how to create resource classes and methods, usage of parameter annotations to access user-defined values, and subresources to consume specific resource methods. We will see when the root-resource classes are accessible, and the rules for injecting the path annotations to access values. Lastly, we will learn how to load the resource classes using different methods of the Application model, ResourceConfig, and Without Application Model.

Chapter3, Client API, shows how to consume the RESTful web services that are using the JAX-RS client API. We will cover how to call web services for different HTTP headers and *Param annotations, so that we can then perform all the CRUD operations using this client API. JAX-RS is a wrapper class of the HTTP, so we can use any web services that are based on the HTTP protocol. JAX-RS client API follows the uniformity that implements the REST architecture.

Chapter 4, Common Media-Type Representations, covers different representations of the data. Data representation is the primary decision for any application. We need to decide an appropriate representation on the basis of the client that will consume the web services. We will also go through the implementation of different representations on the server side as well as the client side.

Chapter 5, Server-Sent Events (SSE), covers how to create a connection between the client/server and maintain the connection at the server's end. This is needed to push the data from the server to the client without any new request initiated by the client. This type of mechanism is basically used for applications such as chatting, stock market, or any real-time data-providing applications.

Chapter 6, WADL, describes Web Application Description Language (WADL), which is a skeleton of the deployed RESTful web service.

This book is intended for the Java EE developers who are building the application on the REST architecture. This is a quick handbook for learning JAX-RS 2.0. Developers should be having knowledge about the RESTful web services and not mandated to JAX-RS 1.0.

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code and the output being generated by the code are added to the book as screenshots.

A block of code is set as follows:

@Path("/getResource")
public class GetResource {
    @GET
    public String get() {
        return "Hello World!!!";
    }

    @GET
    @Path("{name}")
    public Response greetUser(@PathParam("name") String name){
        returnResponse.status(200).entity("Hello, " + name).build();
    }
}

New terms and important words are shown in bold. Words that you see on the screen, in menus, or dialog boxes for example, appear in the text like this: "clicking the Next button moves you to the next screen".

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