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A new world with cdi en
- 1. A new world with CDI An essay around some of the design changes encouraged by CDI + Seam 3 Monday, May 16, 2011
- 2. Who am I ? • Software developer at R&D department at Softplan in Brazil • Seam 3 Contributor • Hobbyist game programmer • CIA spy (it’s a secret, don’t tell anyone) Monday, May 16, 2011
- 3. Agenda Monday, May 16, 2011
- 4. Agenda • Contextualization Monday, May 16, 2011
- 5. Agenda • Contextualization • A quickly introduction to CDI Monday, May 16, 2011
- 6. Agenda • Contextualization • A quickly introduction to CDI • A real quickly introduction on Seam 3 Monday, May 16, 2011
- 7. Agenda • Contextualization • A quickly introduction to CDI • A real quickly introduction on Seam 3 • Design simplicity with CDI Monday, May 16, 2011
- 9. A little of web application history Monday, May 16, 2011
- 10. The rise of Java • CGI • Servlet • Servlet + JSP • Templating, tag libraries • The era of frameworks Monday, May 16, 2011
- 11. Struts, Hibernate, Spring • It was almost impossible to develop an application with pure J2EE • Different frameworks to approach different application development needs • Data abstractions • IoC • Flow control Monday, May 16, 2011
- 12. JEE 5 • JPA • EJB3 • JSF1.2 • Annotations • ... Monday, May 16, 2011
- 13. Seam • The Glue between JSF and EJB • Context management and DI Monday, May 16, 2011
- 14. The Real story • A king tired of lazyInitializationExceptions Monday, May 16, 2011
- 15. Have you seen similar method names? • getCustomerWithAddress() • getCustomerWithFoo() • getCustomerWithFooAndBar() Monday, May 16, 2011
- 16. JEE6 • CDI • JSF2 • JPA2 • EJB3.1 • ... Monday, May 16, 2011
- 17. CDI main goals • The Standard glue between JSF and EJB • Injectable beans with Managed lifecycle • loose coupling • TypeSafe • AOP and Events Monday, May 16, 2011
- 18. “CDI simplifies and sanitizes the API for DI and AOP” Monday, May 16, 2011
- 19. “CDI simplifies and sanitizes the API for DI and AOP” Rick Hightower Monday, May 16, 2011
- 20. “CDI rulez!” Monday, May 16, 2011
- 21. “CDI rulez!” me Monday, May 16, 2011
- 22. “Designing with CDI is a road to be discovered, specially when we consider the event handling feature” Monday, May 16, 2011
- 23. “Designing with CDI is a road to be discovered, specially when we consider the event handling feature” me too Monday, May 16, 2011
- 24. And seam? what is seam now after it externalized the CDI? Monday, May 16, 2011
- 25. Seam’s mission is to provide a fully- integrated development platform for building rich, standards-based internet applications tailored for traditional and cloud development Monday, May 16, 2011
- 26. Now we can begin Monday, May 16, 2011
- 27. Monday, May 16, 2011
- 28. Pragmatics approach Monday, May 16, 2011
- 29. ECB Pattern • Entity - Control - Boundary EJB CDI Bean JPA Monday, May 16, 2011
- 30. CEC Pattern • CDI - EJB - CDI EJB CDI Bean JPA Monday, May 16, 2011
- 31. CEC Pattern • CDI - EJB - CDI EJB CDI Bean JPA Monday, May 16, 2011
- 32. CEC Pattern • CDI - EJB - CDI CDI bean EJB CDI Bean JPA Monday, May 16, 2011
- 33. CEC Pattern • CDI - EJB - CDI Presenter CDI bean EJB CDI Bean JPA Monday, May 16, 2011
- 34. Simplicity Monday, May 16, 2011
- 35. Goals • Clean design • Less coding, less bugs • Higher productivity • Easier test automation Monday, May 16, 2011
- 36. Common design Monday, May 16, 2011
- 37. javaee 5 Monday, May 16, 2011
- 38. javaee 6 Monday, May 16, 2011
- 39. Easy boy! the world won’t end Monday, May 16, 2011
- 40. Keeps the served list and provides it to the view through EL Renders a list Returns a list Monday, May 16, 2011
- 41. Renders a list Returns a list Monday, May 16, 2011
- 42. And what about the actions? Monday, May 16, 2011
- 43. Problems: • Messages to the view • Flow control Monday, May 16, 2011
- 44. Messages to UI • Proposed solution : Seam MessagesAPI Monday, May 16, 2011
- 45. Flow control • Success and Error: the typical case • Validation can be done before the service with Bean Validations • In case of exceptions it could be handled by a decoupled class (Seam Catch ) Monday, May 16, 2011
- 46. Complex cases: JSF Nav. Rules Monday, May 16, 2011
- 47. xml?? Monday, May 16, 2011
- 48. xml navigation pros • More flexible than implicity navigation • IMO, returning a string as outcome is bad • Clean solution to totally abstract a flow controller • It is tool friendly • ... Monday, May 16, 2011
- 49. Let the structure do its work JSF2 complete Reference, page 12 • JSF Complete Monday, May 16, 2011
- 50. Monday, May 16, 2011
- 51. what about presentation logic? Monday, May 16, 2011
- 52. Model View Presenter Monday, May 16, 2011
- 53. Be careful! • take a closer look at your case • choose to simplify whenever is possible. Monday, May 16, 2011
- 54. Basic references • http://seamframework.org/ • http://www.jcp.org/en/jsr/detail?id=299 • http://www.adam-bien.com/ Monday, May 16, 2011
- 55. Thank you! • Contact: José Rodolfo Freitas joserodolfo.freitas@gmail.com • Supported by: Softplan/Poligraph http://talentos.softplan.com.br • Follow on Twitter: @joserodolfo_f • Blog techblog.joserodolfo.com Monday, May 16, 2011