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Learning Play! Framework 2, by Andy Petrella
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In Detail
The 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!
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.
After setting up the machine and learning some Scala, you will construct an application which builds from static to dynamic, before introducing a database.
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.
The book will end with testing and deployment, which completes any web development project.
Approach
A strong focus is placed on explanation by example; even with the amount of amazing capabilities of Play! 2, they will be gathered in a single application. At the end of this book, the reader will have a fully-fledged application using the basic and advanced features of Play! 2.
Who this book is for
Readers must be interested in the Web in general; specifically using the HTTP between a browser and a server to create blazing projects!
Java skills are beneficial but not necessary since Play! Framework 2 is not J2EE based but introduces a simple, neat, and completely integrated version; the prerequisites are almost none.
- Sales Rank: #1201060 in eBooks
- Published on: 2013-03-26
- Released on: 2013-03-26
- Format: Kindle eBook
About the Author
Andy Petrella
Andy Petrella is first and foremost a Belgian mathematician who tried to find a way to apply his skills to the concrete world. One of them was programming. So, after graduating in Mathematics, he continued his study in Informatics at the University of Li�ge.
He quickly became interested in Geomatics because of the heterogeneous needs of this discipline, which led him to mainly work in the GIS field. Over there, he got the opportunity to sharpen his skills on distributed architecture for interoperable solutions.
After spending time developing in Java and integrating scripting languages such as Python and JavaScript, he slowly moved back to functional programming. Although working with JVM was a constraint, he tried his hand at Scala and took the opportunity to use Play! 2 while it was still in development.
Having found a new way to enjoy mathematics along with programming, he joined one of his friends and they decided to create NextLab (http://www.nextlab.be/), a company that offers the perfect context to push Play! 2 and Scala to the foreground through projects and customers.
Andy also loves to share his experiences, his enjoyment, and his discoveries through the co-creation of a user group called WAJUG (http://wajug.be/) dedicated to help Walloons to meet together and share ideas about information technology. In order to ensure a constant flow of information, he also writes his thoughts on his blog, SKA LA (http://ska-la.blogspot.be/).
Most helpful customer reviews
12 of 12 people found the following review helpful.
Light on advanced content plus horrible grammar = not so great
By SuSu
Overall, the book might be somewhat informative for a very novice developer, hence the two stars, but not much beyond that. There is nothing really in-depth here and it doesn't go much beyond what is found in the online documentation. It actually uses that as an excuse - saying the documentation is too sparse to cover one topic or another so it wasn't included in the book. It also spends so much time literally advertising Play! and Typesafe, even providing a demonstration of the paid Typesafe dashboard, that I wonder if the company had a heavy hand in its publication at times. The author also spends a lot of time describing and showing examples for CoffeeScript, LESS, AJAX, etc. (non-core framework functionality) seemingly to fill space. I find this a little odd for a book by such a reputable publisher.
Also, I got the Kindle edition so I can't speak for the other formats, but at least in the one I have the grammar is horrendous. It seems every other paragraph begins or ends with an exclamation such as "It's that trivial!" or "Its AJAX!" or something to that effect. Misplaced and overused enthusiasm, horrible grammar, misspellings galore and just poor use of the English language on every page lead me to doubt the editors and reviewers spent much, if any, time looking over this book before putting it up for sale. There are a lot of awkward phrases in the book as well which don't make a whole lot of sense. Very poor quality for a $40+ book, not what I'd expect. Obviously the author is not a native English speaker, but I can't fault him - I fault the reviewers who let these issues pass to the final version unchecked.
If you really want to learn Play! Framework, stick to the documentation and do some experimentation with the examples the core team provides which are great. This book may give you a high-level overview of some very basic functionality, but a lot of it will be outdated by the time you read it and/or just wrong from the get-go (which I found a couple times in the examples). Unfortunately, there isn't a lot of literature out there for Play! 2.x and it seems the documentation that is out there, like this book, isn't very good.
19 of 23 people found the following review helpful.
Save your money and time
By Salvatore R. Mangano
If you intend to do anything non-trivial with the Play framework then don't bother with this book. It is very light on details. I learned more about play by browsing the documentation on the http://www.playframework.com/ than using this book. I realize that the author was trying to present a beginners guide to Play but like so many beginner books the author confuses "being chatty" with "being simple for the beginner". If you really intend to do some serious work with Play than I recommend a) start with docs, 2) then read Play for Scala (Manning - currently in MEAP form) 3) Do a lot of Googling to fill in Gaps.
7 of 8 people found the following review helpful.
Good Introduction Book
By Josep Prat
This book is a good one to get familiar with Play Framework. However, if you are looking for an advanced Play book, this is not for you.
The book follows the well-known chat-like applications (in the book Forum + Chat + Twitter Feed), but I must say, the approach used here was different from the ones I was used to. The book is centered in the Java API, but the code provided with the book contains examples for both Java and Scala. You can download the code from http://www.packtpub.com/learning-play-framework-2/book
Pros:
* Good Introductory Book
* Incremental complexity
* Includes Testing
* Explains how to bring the app live
Cons:
* Some noise introduced when explaining outsider frameworks or languages (CoffeeScript, Less)
* Asynchronous should be explained in more depth
I'll try to give my 5 cents chapter by Chapter:
1) Getting Started
This chapter is skip-able if you are familiar with Play. Nothing new under the sun here.
2) Taking the First Step
Another introduction, now it is Scala's turn. This is needed for the Templates used in Play! Framework. Again, nothing new if you are familiar with Scala.
3) Templating Easily with Scala
Here it's when the tutorial really begins. It's a nice introduction to Templates in Play! Framework, nothing exhaustive though. In this chapter, there is a tiny introduction to Less, as I said before, in my opinion, this only adds some noise to the picture.
4) Handling Data on the Server Side
Our tiny example grows in this chapter as we provide it with a Database. This chapter contains a quick introduction to ORM's and how we can validate the input data easily in Play Framework.
5) Dealing with Content
Nice explanation on how the content is being parsed and which parses already exist in Play. Well explained.
6) Moving to Real-time Web Applications
The most interesting part of this chapter is the Websockets introduction, very basic though. In this chapter our little app becomes dynamic as we push data from the server to the Browser. Again, there is some noise due to the (unneeded?) introduction to CoffeeScript.
7) Web Services
Easy introduction to REST and problems derived from interacting with 3rd-party services like Twitter. Our little app becomes asynchronous. I think the author doesn't manage to explain the complexity of asynchronicity and how it works behind the scenes.
8) Smashing All Test Layers
I find it very good that the author decided to include this chapter. Testing is usually the forgotten part of all this introduction books. It explains the different types of testing and how this can be accomplished with Specs2.
9) Code Once, Deploy Everywhere
This chapter was a complete surprise. The author decided to spend some time explaining how we can bring our little application to a Live environment. It describes briefly which services can be used and are compatible with Play Framework. Nice chapter! I hope the author keeps it up to date in further editions.
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