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- Herausgeber: Packt Publishing
- Kategorie: Fachliteratur
- Sprache: Englisch
This book is intended for those developers who are keen to master the internal workings of Play Framework to effectively build and deploy web-related apps.
Das E-Book können Sie in Legimi-Apps oder einer beliebigen App lesen, die das folgende Format unterstützen:
Seitenzahl: 257
Veröffentlichungsjahr: 2015
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Table of Contents
Mastering Play Framework for Scala
Mastering Play Framework for Scala
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: May 2015
Production reference: 1260515
Published by Packt Publishing Ltd.
Livery Place
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Birmingham B3 2PB, UK.
ISBN 978-1-78398-380-3
www.packtpub.com
Credits
Author
Shiti Saxena
Reviewers
Didier Bathily
Jérôme Leleu
Jon Parsons
Commissioning Editor
Amarabha Banerjee
Acquisition Editor
Subho Gupta
Content Development Editor
Sriram Neelakantan
Technical Editors
Novina Kewalramani
Manal Pednekar
Shruti Rawool
Copy Editors
Sonia Michelle Cheema
Vikrant Phadke
Project Coordinator
Vijay Kushlani
Proofreaders
Stephen Copestake
Safis Editing
Indexer
Monica Ajmera Mehta
Graphics
Sheetal Aute
Disha Haria
Production Coordinator
Arvindkumar Gupta
Cover Work
Arvindkumar Gupta
About the Author
Shiti Saxena is a software engineer with around 4 years of work experience. She is currently working with Imaginea (a business unit of Pramati). She has previously worked with Tata Consultancy Services Ltd. and Genpact.
A true polyglot, she's had exposure to various languages, including Scala, JavaScript, Java, Python, Perl, and C. She likes to work with Play Scala and AngularJS.
She blogs at http://eraoferrors.blogspot.in and maintains open source projects on GitHub.
She loves to travel, is a movie buff, and likes to spend time playing her piano whenever she is not programming.
She has authored Getting Started with SBT for Scala (https://www.packtpub.com/application-development/getting-started-sbt-scala).
Acknowledgments
I am indebted to my mother, Nithi, and my sisters, Shaila, Anshu, and Aastha, for their constant support. I am grateful to Aastha for helping me out with the images of this book.
A special thanks to my cousin Rohit for being there for me; he has guided, mentored, understood, and pampered me throughout. This book would not have been possible without his help. I would also like to thank his organization, Tuplejump.Inc, for giving me the idea of using real-time applications with Play Framework.
I'd like to thank Jay and Vijay Pullur for taking the initiative to start Pramati and everyone who's a part of it for making it a great place to work at.
I'd like to thank Apurba for believing in me and supporting me in my journey. I wouldn't have learned a lot of things if it wasn't for his guidance.
I'd also like to thank Guillaume Bort, Sadek Drobi, the Play Framework community, and Typesafe without whose efforts, bringing this technology to the forefront and writing this book wouldn't have been possible.
I am grateful to my friends for being there for me when I needed them.
A huge thanks to the team of Packt Publishing for coordinating and being patient with me when I wasn't able to meet their deadlines. I am also thankful to the reviewers, Didier, Jérôme, and Jon, for their valuable feedback, which has helped improve this book.
I would like to express my gratitude to everyone who has helped me reach this stage in my life. Thanks!
About the Reviewers
Didier Bathily is a Malian software engineer living in France, who founded an IT development company in 2011 with his friends (http://www.njin.fr).
His involvement in this field and passion for new technologies have given him some versatility in software development. Indeed, for customer's njin, he develops modern web applications in Scala / Play Framework, mobile applications for iOS or Android, and games for iOS or Mac OS X applications.
You can find him on GitHub at https://github.com/dbathily and on Twitter at https://twitter.com/dbathily.
Jérôme Leleu is a software architect living in Paris, France.
A consultant for 7 years, he has worked in many different companies and fields with different people. He has participated in many IT projects as a developer, technical lead, or projects manager, mostly involving J2EE technology.
Now, working in a French telecom company, he is the software architect of the web SSO, which supports very high traffic: millions of authentications from millions of users every day.
He is involved in open source development as a CAS (WebSSO) chairman. He is interested in security/protocol issues and has developed several libraries at http://www.pac4j.org to implement client support for protocols such as CAS, OAuth, and OpenID.
He is now the founder of an SSO cloud provider based on CAS (https://www.casinthecloud.com).
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Preface
The Play Framework is an open source web application framework that is written in Java and Scala. It follows the Model-View-Controller architectural pattern.
It enables the user to use Scala for application development, keeping key properties and features of the Play Framework intact. This results in faster and scalable web apps. Also, it uses a more functional and "Scala idiomatic" style of programming, without sacrificing simplicity and developer friendliness.
This book will provide advanced information on developing Scala web applications using the Play Framework. This will help Scala web developers master Play 2.0 and use it for pro-Scala web app development.
What this book covers
Chapter 1, Getting Started with Play, explains how to build simple applications using the Play Framework. We also explore the project structure so that you can understand how the framework plugs in the required settings through a build file.
Chapter 2, Defining Actions, explains how we can define an application-specific action with default parsers and results, and also with custom parsers and results.
Chapter 3, Building Routes, is where we see how essential routing is in a Play application. Apart from this, we also check out various default methods that Play provides for simplifying the process of routing.
Chapter 4, Exploring Views, explains how to create views using Twirl and the various other helper methods provided by Play. In this chapter, you also learn how you can support multiple languages in your Play application using the built-in i18n API.
Chapter 5, Working with Data, demonstrates different ways of causing application data to persist in an application that we build using the Play Framework. In addition to this, you also get to understand how the Play Cache API can be used and how it works.
Chapter 6, Reactive Data Streams, discusses the concepts of Iteratee, Enumerator, and Enumeratee and how they can be implemented in the Play Framework and used internally.
Chapter 7, Playing with Globals, gives an insight into the features provided for a Play application through the global plugin. We also discuss hooks for the request-response life cycle, using which we can intercept requests and responses and modify them if required.
Chapter 8, WebSockets and Actors, briefly covers the Actor Model and the usage of Akka Actors in an application. We also define a WebSocket connection in a Play application with various constraints and requirements, using different approaches.
Chapter 9, Testing, shows you how a Play application can be tested using Specs2 and ScalaTest. We go through the different helper methods available for simplifying testing of a Play application.
Chapter 10, Debugging and Logging, is where we configure the debugging of a Play application in the IDE. In this chapter, you get to learn how to start a Play application in the Scala console. This chapter also places emphasis on the logging API provided by the Play Framework and the methods of customizing the log format.
Chapter 11, Web Services and Authentication, explains the WS (WebService) plugin and the API exposed through it. We also access users' data from the service providers using OpenID and OAuth 1.0a.
Chapter 12, Play in Production, explains how to deploy a Play application on production. While deploying the application, we also check the different packaging options (RPM, Debian, ZIP, Windows, and so on) available by default.
Chapter 13, Writing Play Plugins, gives an explanation of all plugins, with their declaration, definition, and best practices.
What you need for this book
Before starting with this book, make sure that you have all of the necessary software installed. The prerequisites for this book are as follows:
Who this book is for
This book is intended for those developers who are keen on mastering the internal working of Play Framework to effectively build and deploy web-related apps. It is assumed that you have a basic understanding of the core app development techniques.
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