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)

Chapter 3. Understanding WebSockets and Server-sent Events in Detail

WebSocket is one of the most promising features that HTML5 has to offer. As covered in Chapter 2, WebSockets and Server-sent Events, the traditional request-response model incurred an overhead due to the HTTP headers. With WebSockets, once the initial handshake is done the client and server or peers can communicate directly without the use of headers. This reduces the network latency and gives a reduction in HTTP header traffic.

Chapter 2, WebSockets and Server-sent Events, also introduced Server-sent Events and provides a comparison between SSE and WebSockets.

Server-sent Events define an API where the server communicates and pushes events to the clients as they occur. It is a one-directional communication from the server to the client and has more benefits as compared to traditional polling and long polling techniques.

This chapter covers advanced concepts of WebSockets and Server-sent Events and covers the following sections...