Book Image

Learning Play! Framework 2

By : Andy Petrella
Book Image

Learning Play! Framework 2

By: Andy Petrella

Overview of this book

<p>The Learning Play! Framework 2 has been created for web developers that are building web applications. The core idea is to focus on the HTTP features and to enable them through a simplification lens. Building a web application no longer requires a configuration phase, an environment setup, or a long development lifecycle - it's integrated!<br /><br />Learning Play! Framework 2 will enable any web developers to create amazing web applications taking advantage of the coolest features. It's the fastest way to dive into Play!, focusing on the capabilities by using them in a sample application. Although essentially Java based code, a Scala version is presented as well – giving an opportunity to see some Scala in action.<br /><br />After setting up the machine and learning some Scala, you will construct an application which builds from static to dynamic, before introducing a database. <br /><br />Then we'll focus on how data can be consumed and rendered in several ways. This will enable some real time communication through WebSocket and Server-Sent Event – on both server and client sides.</p> <p>The book will end with testing and deployment, which completes any web development project.</p>
Table of Contents (20 chapters)
Learning Play! Framework 2
Credits
About the Author
Acknowledgement
About the Reviewers
www.packtpub.com
Preface
Materials
Index

Rendering contents


In this section, we'll see how a Play! 2 server is able to render different resources in different ways rather than simply providing HTML pages.

The actions' body in Play! 2 not only have the responsibility of creating resources to be provided to the outside world, but also of declaring how this resource has to be rendered. Fortunately, there are a lot of boilerplates already written for our use in the default actions builder.

The so-called actions builder are the methods we have used almost blindly until now; that is to say, the static methods available in the play.mvc.Results.java class such as ok, redirect, badRequest, and unauthorized.

Indeed, these methods have been overloaded several times in order to accept several representations. The following are some examples:

  • Content: This takes content that is of the base type of classic string representations such as Html, Xml, and Txt. This is also the result-type of a rendered template.

  • String: This will be rendered as is...