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Hands on web development with play 2.0
- 1. Hands-on Web Development with Play 2.0! Abbas Raza Jean-Baptiste Volta
- 2. Gratitude YOU for stopping by!! SVCC for organizing the Camp Guillaime Bort for Play Framework
- 3. Game Plan Play Framework Primer (~ 15 min) - Concepts - Architecture - Artifacts It’s Play time (Rest of session) - Setting up Play - Building App Step-by-Step
- 4. What’s Play? Designed by web developers for web developers Brings high-productivity web development to the JVM Greatly enhances developer experience (DX)
- 5. Full stack web framework Java and Scala support High productivity Stateless architecture HTTP centric Typesafe Asynchronous Highly scalable Integrated testing
- 6. High Productivity Make changes and hit reload in Java world!! Compile-time checking Type-safe Console Built-in server Useful error reporting
- 7. Compile-time Checking Checks almost all the artifacts at compile-time – Java/Scala code – Templates – Routes – Config – Javascript (via Google Closure) – LESS – Coffeescript
- 8. Stack trace – Ring a bell?!
- 9. Error Reporting Browser error reporting Simplified and useful info
- 10. Error Reporting
- 11. HTTP Centric Designed around HTTP, hence stateless State either at client or in persistence layer Back button works! Does not fight HTTP or the browser - leverages the power of HTTP
- 13. Clean URL Design URL design part of the application design URL is an interface – a contract not implementation URLs are human and machine friendly For instance http://localhost:9000/#/projects/3/tasks
- 15. Testing Spec2 - Default way to test Test controller, router, template Test from browser
- 17. Architecture
- 18. Downloading & Installation Download the binaries from http://www.playframework.com/down load Latest version – 2.0.4 Unzip it to any location Add play to path
- 19. Create New Project Run the following command $ play new coolApp “Start” the application with $ cd coolApp $ play run
- 21. Application Configuration Configuration properties for any application. Examples include database connection info. File located at: <Project>/conf/application.conf A typical entry looks like: – db.default.driver=org.h2.Driver
- 22. application.conf
- 23. Router What: Routes requests to appropriate controller Where: File located at: <Project>/conf/routes Typical entries: GET / controllers.Application.index
- 24. routes
- 25. Controllers Controller serves requests Contains business logic Located at <project>/app/controllers
- 26. Controllers package controllers import play.api._ import play.api.mvc._ object Application extends Controller { def index = Action { Ok("Hello, Rockstar") } }
- 27. Templates Template encapsulates HTML to be rendered Is a Scala function Is type-safe Are compiled into classes for run-time
- 28. Templates @(user: User)(body: Html) <html> <body> <header> <dl id="user"> <dt>@user.name</dt> </dl> </header> <section id="main"> @body </section> </body> </html>
- 29. IDE Support Eclipse – eclipsify IntelliJ – idea Netbeans – netbeans ScalaIDE
- 30. Free Online Scala Course by Martin Odersky http://www.coursera.org/course/prog fun
- 32. It’s Play time Implement a Lean Startup concept Lean Startup Movement mandates validating the pain point before building any product Step-by-step development of the application from scratch
- 33. Thank You!!
- 34. References http://www.playframework.com Play 2 with Scala in Action by Peter Hilton, Erik Bakker, Francisco Canedo
- 35. Image References ‘Lets play’ - http://www.drpeppersnapplegroup.com/smedia/www/2011/04/11/img-lets- play460x300_223742710844.jpg ‘Architecture diagram’ – http://www.playframework.org