Book Image

Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON

By : Bhakti Mehta, Masoud Kalali
Book Image

Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON

By: Bhakti Mehta, Masoud Kalali

Overview of this book

<p>As the technology landscape moves focus towards smaller devices, the need for building scalable, flexible, lightweight, and real-time communications-based applications grows. HTML 5 and Java EE 7 provide a new synthesis of technologies that demonstrate tremendous scope and potential in areas of device independence, asynchronous communication, interoperability, and portability.<br /><br />Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON is a practical, hands-on guide that provides you with clear and pragmatic information to take advantage of the real power behind HTML5 and Java EE technologies. This book also gives you a good foundation for using them in your applications.<br /><br />Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON looks at the different HTML5-based Java EE 7 API, and takes a deep dive into the individual areas of technologies to cover basic to advanced concepts, and also provides best practices for each API. You will also learn how to build a REST-based Event Notification Application using the Twitter API, tying all the different technologies together that we will cover. You will also take a look at integrating different Java EE APIs to build a Library Application. If you want to take advantage of using the new HTML5 technologies and Java EE 7 platform, then this is the book for you. You will learn everything you need to know to build portable RESTful Web Services with JAX-RS 2.0, Web Sockets, JSON, and Server-Sent Events.</p>
Table of Contents (12 chapters)

Introducing Servlet 3.1


The Java EE 7 specification brings along an updated specification for Servlet API, which addresses some of the community-requested and industry-required changes including but not limited to the following list of changes:

  • Addition of the NIO API to servlet specification

  • Adding new protocol upgrading support for WebSockets, and so on

The next two sections cover the details of these changes and how they can be used.

NIO API and Servlet 3.1

Servlet 3 introduced async processing of incoming requests in which a request could be placed in a processing queue without a thread being bound to the request until the request processing is finished. In Servlet 3.1, another forward step made forward in which receiving the request data writing back the response can be done in a non-blocking, callback-oriented manner.

Introducing ReadListener and WriteListener

The two listeners are introduced to allow developers to basically receive notification when there is incoming data available to read...