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Java EE 8 Application Development

You're reading from   Java EE 8 Application Development Develop Enterprise applications using the latest versions of CDI, JAX-RS, JSON-B, JPA, Security, and more

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788293679
Length 372 pages
Edition 1st Edition
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Author (1):
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David R. Heffelfinger David R. Heffelfinger
Author Profile Icon David R. Heffelfinger
David R. Heffelfinger
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Table of Contents (15) Chapters Close

Preface 1. Introduction to Java EE FREE CHAPTER 2. JavaServer Faces 3. Object Relational Mapping with the Java Persistence API 4. Enterprise JavaBeans 5. Contexts and Dependency Injection 6. JSON Processing with JSON-P and JSON-B 7. WebSocket 8. Java Messaging Service 9. Securing Java EE Applications 10. RESTful Web Services with JAX-RS 11. Microservices Development with Java EE 12. Web Services with JAX-WS 13. Servlet Development and Deployment 14. Configuring and Deploying to GlassFish

JSF WebSocket support


In typical web applications, servers always respond to requests from a browser; there is no way for a server to send data to the client browser without responding to a request. WebSocket technology provides full duplex communication between a browser and a server, allowing servers to independently send data to a client, without having to respond to a request. WebSocket technology allows a myriad of new applications to be developed for the web, including updating stock tickers, multiplayer online games, and chat applications.

Note

Although some of these types of web applications were developed before the advent of WebSockets, they relied on hacks to work around the limitations of the HTTP protocol. With WebSockets, these hacks are no longer necessary.

Traditionally, writing applications taking advantage of the WebSocket protocol required a lot of JavaScript code. JSF 2.3 introduces WebSocket support and abstracts out most of the JavaScript plumbing, allowing us to focus...

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