2. REST em Java WebServices Ágeis, podeosos e fáceis Edgar Silva [email_address] @jedgarsilva

3. REST (#restfisl11)

4. Re presentational S tate T ransfer

6. Web (somente Web)?

7. Defina sua semantica de respostas (padrões XML, JSON, SEU)?

9. Orientado a Representações

10. Sem Estado (HTTP)(*)

11. Hypermedia (Design)

12. (*) Gambis

14. http://rest.fisl.org/11/palestrante

16. QueryStrings: Famosos ? Serviço do Fisl, edição 11, sessão de número 918

18. Não rodeie, por mais que você tente você não vai resolver tudo!

19. Lembre-se:

20. Simples != Medíocre

22. POST

23. PUT

24. DELETE

27. Put – Escrita (insere/atualiza), idempontente

28. Delete – Remover, idempontente

29. Post – Não idempotente

32. Parte do JEE6

34. RestEasy (JBoss/RedHat)

35. REST em Java @Path ("/fisl") public class Fisl { @GET @Path ("/sessoes") public String getSessoes() { //logica } http://servidor:8080/minhaapp/fisl/sessoes }

36. REST em Java @GET @Path("/sessoes/{sessao}") public String getSessaoByID(@PathParam("sessao") String sessao) { // procura pela sessao } @PUT @Path("/sessoes/{sessao}/reservar") public void addBook( @PathParam ("sessao") String sessao, @QueryParam ("email") String email) { //grava no banco uma reserva } http://servidor:8080/minhaapp/fisl/sessoes/819 .. minhaapp/fisl/sessoes/819/reservar?email=edgar@redhat.com }

38. @HeaderParam – H T T P header

39. @CookieParam – H T T P c o o k ie

40. @FormParam – Objetos de Forms

41. @PathParam – Caminho U R I

42. @MatrixParam – Lista de URIs

43. Tá bom! Me mostre código! Hora do DEMO

45. Acordem! Hora da Demo!

46. JBoss RestEasy http://jboss.org/resteasy

47. Expressões regulares nas URIs @Path("/servico) public class MeuServico { @GET @Path("{var:.*}/algo") public String get() {...} GET /servico/algo GET /servico/antes/algo GET /servico/no/meio/de/algo

48. Linkabilidade @Path(&quot;/&quot;) @Consumes({&quot;application/xml&quot;, &quot;application/json&quot;}) @Produces({&quot;application/xml&quot;, &quot;application/json&quot;}) public interface BookStore { @AddLinks @LinkResource(value = Book.class) @GET @Path(&quot;books&quot;) public Collection<Book> getBooks(); <?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?> <book xmlns:atom=&quot;http://www.w3.org/2005/Atom&quot; title=&quot;foo&quot; author=&quot;bar&quot;> <atom:link href=&quot;http://localhost:8081/books&quot; rel=&quot;list&quot;/> <atom:link href=&quot;http://localhost:8081/books&quot; rel=&quot;add&quot;/> <atom:link href=&quot;http://localhost:8081/book/foo&quot; rel=&quot;self&quot;/> <atom:link href=&quot;http://localhost:8081/book/foo&quot; rel=&quot;update&quot;/> <atom:link href=&quot;http://localhost:8081/book/foo&quot; rel=&quot;remove&quot;/> </book>

49. Linkabilidade @Path(&quot;/&quot;) @Consumes({&quot;application/xml&quot;, &quot;application/json&quot;}) @Produces({&quot;application/xml&quot;, &quot;application/json&quot;}) public interface BookStore { @AddLinks @LinkResource(value = Book.class) @GET @Path(&quot;books&quot;) public Collection<Book> getBooks(); { &quot;book&quot;: { &quot;@title&quot;:&quot;foo&quot;, &quot;@author&quot;:&quot;bar&quot;, &quot;atom.link&quot;: [ {&quot;@href&quot;:&quot;http://localhost:8081/books&quot;,&quot;@rel&quot;:&quot;list&quot;}, {&quot;@href&quot;:&quot;http://localhost:8081/books&quot;,&quot;@rel&quot;:&quot;add&quot;}, {&quot;@href&quot;:&quot;http://localhost:8081/book/foo&quot;,&quot;@rel&quot;:&quot;self&quot;}, {&quot;@href&quot;:&quot;http://localhost:8081/book/foo&quot;,&quot;@rel&quot;:&quot;update&quot;}, {&quot;@href&quot;:&quot;http://localhost:8081/book/foo&quot;,&quot;@rel&quot;:&quot;remove&quot;} ] } }

50. REST Assincrono / COMET import org.jboss.resteasy.annotations.Suspend; import org.jboss.resteasy.spi.AsynchronousResponse; @ Path ( &quot;/&quot; ) public class SimpleResource { @ GET @ Path ( &quot;basic&quot; ) @ Produces ( &quot;text/plain&quot; ) public void getBasic( final @Suspend (10000) AsynchronousResponse response) throws Exception { Thread t = new Thread() { @Override public void run() { try { Response jaxrs = Response .ok( &quot;basic&quot; ).type( MediaType .TEXT_PLAIN).build(); response.setResponse(jaxrs); } catch (Exception e) { e.printStackTrace(); } } }; t.start(); } }

51. Api JavaScript @ Path ( &quot;orders&quot; ) public interface Orders { @ Path ( &quot;{id}&quot; ) @ GET public String getOrder( @ PathParam( &quot;id&quot; ) String id) { return &quot;Hello &quot; +id; } } // JavaScript var order = Orders.getOrder({id: 23}); // Uso do Objeto REST // Change the base URL used by the API: REST.apiURL = &quot;http://api.service.com&quot; ; // log everything in a div element REST.log = function (text ) { jQuery( &quot;#log-div&quot; ).append( text ); };

52. Conclusão

53. REST é um ótimo modelo de integração, quanto empregado de forma simples e sem burocracia, melhor ainda. Você ainda pode precisar de SOAP,WSDLs, ou seja: WS Tradicionais, mas REST é uma ótima alternativa

55. http://jcp.org/en/jsr/detail?id=311

56. RESTEas y

57. http://jboss.org/resteasy

58. Bill Burke’s R E S T series no: DZone

59. http://java.dzone.com/articles/putting-java-rest

60. Perguntas?

61. Edgar Silva [email_address] Twitter @jedgarsilva