How to Play at Work - A Play Framework Tutorial

How to Play at Work - A Play Framework Tutorial

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  A Play FrameworkTutorial Assist-Software Romania- Marius Carp
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  What is PlayFramework • An open-source modern web framework • Based on a lightweight, stateless, web-friendly architecture. • Built on Akka, Play provides predictable and minimal resource consumption • Developer friendly • Has great support for Eclipse and Intellij IDEA. • Provides RESTful by default • Has a built-in JSON module and extensive NoSQL & Big Data Support. • There are libraries for everything - most of which can be used in Play.
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  System Requirements • InstallJDK 1.6 or later. • Install Scala (general-purpose language designed to support clear, concise and type-safe programming). Optional, but good to have, you may also use Java. • Install SBT is an open source build tool for Scala and Java projects, similar to Java's Maven or Ant. • Install Play Framework through a tool called Typesafe Activator. • Install PostgreSQL. • Install pgAdmin is a comprehensive PostgreSQL database design and management system.
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  Game Play Tutorial •Let's create a new vanilla Play Scala application and name it scala-game. Here is the command you need to run it in command-line: • To start your game from command-line run from your project root folder: • or (recommanded) • To view your work go to: http://localhost:9000/
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  Game Configuration Tutorial •To add more experience to your Play skills add the following dependencies to your build.sbt file: • Slick - a modern database query and access library for Scala. -It allows you to work with stored data and gives you full control • PostgreSQL JDBC is necessary to connect to PostgreSQL database
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  Game Configuration Tutorial •Then, create a database and add its credentials to application.config file. • Add a package named dao to your app folder • Define database tables and set it in configuration • Uncomment evolution plugin and set it enabled • Play Framework's Evolutions will create tables and relations between them (primary keys, indexes, sequences etc...) for you.
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  Game Configuration Tutorial •We have to specify to which database to connect creating a trait named PostgresSupport and define an implicit database
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  Loading Textures inPlay Framework • Create a package models and in it a case class named Player • Play tracks your database evolutions using several evolution scripts located in the db/evolutions directory. • The first script is named 1.sql. • We just need to map the models to tabels. • PostgreSQL will generate a PrimaryKey for the player using AutoInc:
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  Loading Textures inPlay Framework • A GET HTTP request will be made to this route "/„ when a user first time accesses our application . • The entire list of routes can be found in the conf/routes file • Each route consists of an HTTP method and URI pattern, both associated with a call to an Action generator. • An Action is basically a request => result function that handles a request and generates a result to be sent to the client. • A Controller is nothing more than a singleton object that generates Action values.
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  Play Framework Gamemodes • You can chose to Play in two ways: • Single player using Play Scala template • Multi player using one of the following JavaScript frameworks: AngularJS, BackboneJS, EmberJS, ExtJS, DustJS . • Adding a new player and get players list using Slick. • players list (players is the mapped table) • add new player
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  Single Player A PlayScala template • Is a simple text file, that contains small blocks of Scala code. • Can generate any text-based format, such as HTML, XML or CSV. • Allow web designers to easily work with the templates. • Templates are compiled as standard Scala functions. • If you create a views/Application/index.scala.html template file, it will generate a views.html.Application.indexfunction.
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  Single Player A PlayScala template • In index.scala.html we have the player list • Play Framework will render the page server-side. • Adding players to the game is as simple as that: submit a form using POST to this route /player/single
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  Multi Player • Youwill have two separated applications in one project: • API Backend (presistent data) • Frontend side (making AJAX calls to the server)- in public folder. • To test your calls use Postman. • Make a GET call to /player/multi • This will execute controllers.Application.findAll and it will return a list of players in JSON format.
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  Multi Player • Example: •To add a player use POST method to this route /player/multi with the following JSON body: { "name": "Newbie", "level": 1 }
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  Game Features • AmazonS3 module (Scala) - allows you to list, get, add and remove items from a S3 bucket. • Authentication and Authorization module (Scala) - offers Authentication and Authorization features to Play2.x applications. • Deadbolt 2 Plugin -powerful authorisation mechanism for defining access rights to certain controller methods • Dust Plugin – provides support for the dust client side template language (DustJS). • Memcached Plugin - provides a memcached based cache implementation. • MongoDB Salat, Casbah Plugin (Scala) - provides managed MongoDB access and object mapping using Salat and Casbah • Redis Plugin (Java and Scala) - provides a redis based cache implementation • SecureSocial (Java and Scala) - an authentication module supporting OAuth, OAuth2, OpenID, Username/Password and custom authentication schemes.
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  Most popular Players •LinkedIn • The Guardian • Twitter • Foursquare • Coursera • Klout • Walmart More details here: http://assist-software.net/blog/how-play-work-play-framework-tutorial