#OracleCode #Seul Presentation. The Play Framework, based on a lightweight, stateless, web-friendly architecture, is a great framework for easier, faster, complex web development, including RESTful services, and is reactive. Based on Scala, you can choose between using Java or Scala for development. This session explores Play framework characteristics, how to create a RESTful service, connecting Play to a MySQL database, and adding a security level with JWT (JSON Web Token).

1. Rest Services with
Play Framework,
Adding Security with JWT
Seoul

2. Mercedes Wyss
@itrjwyss
Community Leader
JDuchess Chapter Guatemala, Devs+502
Ex-JUG Member
Guatemala Java Users Group (GuateJUG)
Chief Technology Officer (CTO) at Produactivity
Full Stack Developer, Front-end y Back-end with Java, Mobile
Development Android and iOS
Auth0 Technologies Ambassador

3. Agenda
• Play Framework
• Web Services Restful
• JSONs
• JWT (Json Web Tokens)

4. Agenda
• Play Framework
• Web Services Restful
• JSONs
• JWT (Json Web Tokens)

6. Play Framework
• Makes it easy to build web applications with Java and
Scala.
• Is based on a lightweight, stateless, web-friendly
architecture.
• Built on Akka, provides predictable and minimal resources
consumption (CPU, memory, threads) for
highly-scalable applications.

8. Server:
1 CPU
1 GB Ram

10. Java or Scala

11. Is Reactive

12. MVC Architecture

13. App Server
Since Version 2.6.x
Fewer Configurations

14. JRebel Behavior
More code, Less deploys

15. How start a Play project?
We need to use SBT
Create
sbt new playframework/play-scala-seed.g8
sbt new playframework/play-java-seed.g8
Deploy
sbt run

16. $ sbt new playframework/play-java-seed.g8
This template generates a Play Java project
name [play-java-seed]: OracleCodeSeul
organization [com.example]: com.produactivity
scala_version [2.12.2]:
play_version [2.6.1]:
Template applied in ./oraclecodeseul
$

17. $ cd oraclecodeseul/
Oraclecodeseul $ sbt run

20. Full
Project
Structure

21. Simple
Project
Structure

27. Agenda
• Play Framework
• Web Services Restful
• JSONs
• JWT (Json Web Tokens)

29. Web Services
• HyperText Transfer Protocol (HTTP)
• Allows communication between a client and a server
• Provide a standard means of interoperating between different
software apps
• Characterized for interoperability and extensibility
• Based on XML

30. Linda.com (June 2017) https://www.lynda.com/Software-Development-tutorials/What-web-service/126131/145941-4.html

31. SOAP
• Simple Object Access Protocol
• XML-based
• Use WSDL as specification description
(Web Services Description Language)
• Need to follow a communication protocol

34. Restful
• Software Architecture based on HTTP methods
(Get, Post, Put, Delete, etc)
• Typically use JSON, but can use XML, Text

36. Madhaiyan Muthu (June 2017) https://www.slideshare.net/madhaiyanm/web-services-a-practical-approach

38. 415
bytes

39. 415
bytes
57
bytes

40. Difference
• If we are sending a xml
of 415 bytes, we are sending 358 bytes more
• If we are sending a json
of 415 bytes, we are sending 358 bytes less
• There is 86% of more or less information

44. Agenda
• Play Framework
• Web Services Restful
• JSONs
• JWT (Json Web Tokens)

46. JSON
• JavaScript Object Notation
• Is a lightweight data-interchange format
• Self-describing
• Human-reading
• Is a Protocol

47. JSON
Example

48. JSON
Scheme

53. Agenda
• Play Framework
• Web Services Restful
• JSONs
• JWT (Json Web Tokens)

55. JWT
Is an open standard (RFC 7519) that defines a compact and
self-contained way for securely transmitting information
between parties as a JSON object.

56. Auth0 (June 2017) https://cdn.auth0.com/content/jwt/jwt-diagram.png

57. JWT Structure

58. JWT Structure

59. JWT Structure

60. To End
Let’s See the Magic Live
México