GraniteDS is an open source alternative to Adobe Flex remoting solutions that allows accessing Java services from Flex applications using typesafe stubs. It provides features for remote service access, JPA persistence, messaging, security, and numeric data types. The framework also supports model-driven validation where constraints defined in Java entities are replicated to the Flex client.

1. ENTERPRISE RIA WITH FLEX, JAVA AND GRANITEDS 2010, September 22 Franck WOLFF and William DRAI

2. A comprehensive open source alternative to Adobe server solutions THE PROJECT OPEN SOURCE : LGPLv2 MATURE : Started late 2006 WEB SITE : http://www.graniteds.org COMMUNITY : 650 members (estimated 5000 users) ADOPTION : Many administrations and corporations in Europe, USA and many other countries

3. PLATFORM STACK

4. AGENDA LIVE DEMO REMOTING TO JAVA SERVICES PERSISTENCE WITH JPA MESSAGING AND DATA SYNCHRONIZATION SECURITY NUMERIC DATA TYPES (new in GDS 2.2) MODEL-DRIVEN VALIDATION (new in GDS 2.2)

6. Lots of boilerplate code and server-side configuration

7. Not typesafe, no code-completion

8. ALTERNATIVE SOLUTION : Tide API

10. Typesafe remote service injection (Spring, CDI beans only)

11. Numeric types in AS3 are limited to int and Number ACCESSING REMOTE SERVICES (1/2)

12. @RemoteDestination public class HelloService { public String hello(String name); } [Inject] public var helloService:HelloService; private function hello(name:String):void { helloService.hello(name, saveResult, saveFault ); } private function saveResult(event:TideResultEvent):void { trace(event.result); } private function saveFault(event:TideFaultEvent):void { Alert.show(event.fault.faultCode); } ACCESSING REMOTE SERVICES (2/2)

14. SOLUTION :

15. AS3 entities are generated by GAS3

16. Serialization of JPA detached objects with their full internal state

17. A local entity cache ensures that each instance exists only once

18. Transparent lazy loading of collections PERSISTENCE WITH JPA (1/2)

19. @Entity public class Book { @Id private Long id; @Basic private String uid; @Basic private String title; } [Inject] public var bookService:BookService; private function saveBook():void { var book:Book = new Book(); book.title = titleInput.text; bookService.saveBook(book); } @Stateless public class BookServiceBean implements BookService { @PersistenceContext private EntityManager em; public Book saveBook(Book book) { return em.merge(book) ; } } PERSISTENCE WITH JPA (2/2)

21. POOR SOLUTION : 'Refresh' button

22. RICH SOLUTION : Use of messaging with the Consumer/Producer pattern (chat)

23. GraniteDS includes a performant Comet engine (Gravity) that uses the capabilities of the underlying application server (non-blocking I/O, native APR, Servlet 3.0...) MESSAGING (1/2)

25. 1. GraniteDS detects data updates and pushes them on a messaging topic

26. 2. The Tide framework merges incoming updates in its local data cache

27. 3. The UI is automatically updated by the Flex data binding mechanism MESSAGING (2/2)

29. Built-in Flex Identity component integrated with Java security frameworks (servlet containers, Spring security, Seam security)

30. Support for web-based authentication (SSO, OpenID...)

31. Role-based and permission-based authorization SECURITY (1/2)

32. [Inject] public var identity:Identity ; private function login():void { identity.login(username, password); } private function logout():void { identity.logout(); } // Retrieve current server authentication state private function creationComplete():void { identity.isLoggedIn (); } Role-based authorization <s:Button label='Delete' enabled=' identity.hasRole( &quot; admin &quot; ) '/> Permission-based authorization <s:Button label='Delete' enabled=' identity.hasPermission(book, &quot; delete &quot; ) '/> SECURITY (2/2)

36. Implementation of Long, BigInteger and BigDecimal types in AS3

37. No loss of precision during serialization

38. Simple arithmetic operations implemented, with fine control over decimal expansion NUMERIC TYPES (2/2)

40. STANDARD SOLUTION : Flex Validator API

41. Requires one validator per input

42. Requires to manually maintain consistency between client-side and server-side validation MODEL-DRIVEN VALIDATION (1/3)

44. 1. GraniteDS includes a client validation engine implementing the Bean Validation API

45. 2. The GAS3 generator replicates Bean Validation annotations into AS3 entities

46. 3. The Flex component FormValidator enforces constraints for all inputs in a form MODEL-DRIVEN VALIDATION (2/3)

48. Client and server validations are always consistent (Gas3)

49. Custom error messages with bundles

50. Server-side validation errors are also notified to the UI

51. Q/A THANK YOU www.graniteds.org