Palestra com ideias sobre o futuro do VRaptor ser baseado em CDI

1. CDI

2. V4?

3. controllers

4. @Resource V3
public class ProductController {
private final ProductDAO dao;
private final Result result;
public ProductController(ProductDAO dao, Result result) {
this.dao = dao;
this.result = result;
}
public void add(Product product) {
dao.save(product);
result.include("message", "Product saved!");
}
}

5. @Controller V4
public class ProductController {
private final ProductDAO dao;
private final Result result;
CDI
@Inject
public ProductController(ProductDAO dao, Result result) {
this.dao = dao;
this.result = result;
}
public void add(Product product) {
dao.save(product);
result.include("message", "Product saved!");
}
}

6. @Controller CDI
public class ProductController {
@Inject private ProductDAO dao;
@Inject private Result result;
public void add(Product product) {
dao.save(product);
result.include("message", "Product saved!");
}
}

7. V4
package br.com.caelum.example.controller;
public class ProductController {
private ProductDAO dao;
public void add(Product product) {
dao.save(product);
}
}

8. V4
package br.com.caelum.example.controller;
public class ProductController {
private ProductDAO dao;
public void index() { /product
....
}
public void add(Product product) {
dao.save(product);
}
}

9. V4
package br.com.caelum.example.controller;
public class RootController {
private ProductDAO dao;
public void list() { /list
...
}
public void index() { /
...
}
}

10. CDI
V4
@Controller
package br.com.caelum.example.customPackage;

11. components

12. V3
@Component
public class ProdutoDao {
private final EntityManager entityManager;
public ProductDao(EntityManager entityManager) {
this.entityManager = entityManager;
}
public void save(Product product) {
entityManager.persist(product);
}
}

13. CDI
public class ProdutoDao {
@Inject private EntityManager entityManager;
public void save(Product product) {
entityManager.persist(product);
}
}

14. component factories

15. @Component
@RequestScoped
public class EntityManagerCreator implements
ComponentFactory<EntityManager> {
private final EntityManagerFactory factory;
private EntityManager entityManager;
public EntityManagerCreator(EntityManagerFactory factory) {
this.factory = factory;
entityManager = factory.createEntityManager();
}
public EntityManager getInstance() {
return entityManager;
}
@PreDestroy
public void destroy() { V3
entityManager.close();
}
}

16. CDI
public class EntityManagerProducer {
public EntityManager create(EntityManagerFactory factory) {
return factory.createEntityManager();
}
public void close(@Disposes EntityManager entityManager) {
entityManager.close();
}
}

17. CDI
public class EntityManagerProducer {
@Produces @RequestScoped
public EntityManager create(EntityManagerFactory factory) {
return factory.createEntityManager();
}
public void close(@Disposes EntityManager entityManager) {
entityManager.close();
}
}

18. CDI
public class EntityManagerProducer {
@Produces @RequestScoped
public EntityManager create(EntityManagerFactory factory) {
return factory.createEntityManager();
}
public void close(@Disposes EntityManager entityManager) {
entityManager.close();
}
}

19. interceptors

20. V3
@Intercepts
@RequestScoped
public class HelloInterceptor implements Interceptor {
public boolean accepts(ResourceMethod method) {
return true;
}
public void intercept(InterceptorStack stack,
ResourceMethod method, Object instance) {
System.out.println("Hello Interceptor ");
stack.next(method, instance);
}
}

21. V4
public class HelloInterceptor implements ControllerInterceptor {
public void intercept(InterceptorStack stack) {
System.out.println("Hello Interceptor");
stack.next();
}
}

22. public class LogUri implements ControllerInterceptor {
V4
@Inject private HttpServletRequest request;
CDI
public void intercept(InterceptorStack stack) {
System.out.println("URI "+ request.getRequestURI());
stack.next();
}
}

23. public class LogUri implements ControllerInterceptor {
V4
@Inject @RequestAttribute private String requestUri;
CDI
public void intercept(InterceptorStack stack) {
System.out.println("URI "+ requestUri);
stack.next();
}
}

24. public class LogUri implements SpecificControllerInterceptor {
@Inject @RequestAttribute private String requestUri;
@Inject private ControllerMethod method;
public void intercept(InterceptorStack stack) {
System.out.println("URI "+ requestUri);
stack.next();
}
public boolean accepts() {
return method.getName().startsWith("log");
}
}
V4

25. @Before(OtherInterceptor.class)
public class LogUri implements SpecificControllerInterceptor {
@Inject @RequestAttribute private String requestUri;
@Inject private ControllerMethod method;
public void intercept(InterceptorStack stack) {
System.out.println("URI "+ requestUri);
stack.next();
}
public boolean accepts() {
return method.getName().startsWith("log");
}
}
V4

26. events

27. V3
@Intercepts(before=ExecuteMethodInterceptor.class)
@RequestScoped
public class BeforeInvocation implements Interceptor {
public boolean accepts(ResourceMethod method) {
return true;
}
public void intercept(InterceptorStack stack,
ResourceMethod method, Object instance) {
System.out.println("Antes da invocação!!");
stack.next(method, instance);
}
}

28. V4
public class BeforeInvocation {
CDI
public void do(@Observes BeforeMethodExecutionEvent evt) {
System.out.println("Antes da invocação!!");
}
}

29. V4
public void do(@Observes AfterValidationEvent evt) {
... CDI
}
public void do(@Observes BeforeRedirectToViewEvent evt) {
...
}
public void do(@Observes BeforeAnythingEvent evt) {
...
}
.....

30. V3
@Component
@ApplicationScoped
public class CustomRoutes implements RoutesConfiguration {
public void config(Router router) {
new Rules(router) {
public void routes() {
routeFor("/clist").is(ClienteController.class).list();
}
};
}
}

31. CDI V4
public class AppRoutesExtensions {
public void register(@Observes CustomRoutesBuilder route) {
route.of("/clist").is(ClienteController.class).list();
}
}

32. CDI V4
public class AppRoutesExtensions {
public void register(@Observes CustomRoutesBuilder route) {
route.of("/clist").is(ClienteController.class).list();
}
}
public class PluginExtensions {
public void register(@Observes CustomRoutesBuilder route) {
route.of("/_plugin").is(MyPlugin.class).plug();
}
}

33. decorators

34. V3
@Component
public class CustomPathResolver extends DefaultPathResolver {
@Override
protected String getPrefix() {
return "/pasta/raiz/";
}
}

35. CDI
@Decorator
public class CustomPathResolver implements PathResolver {
@Inject @Delegate private PathResolver resolver;
public String getPrefix() {
return "/pasta/raiz/";
}
// delegação
public String getExtension() {
return resolver.getExtension();
}
public String extractControllerFromName(String baseName) {
return resolver.extractControllerFromName(baseName);
}
}

36. view helpers

37. CDI
@Named
public class Global {
public String getAsa() {
return "Valor ultra-interessante pra view";
}
}

38. CDI
@Named
public class Global {
public String getAsa() {
return "Valor ultra-interessante pra view";
}
}
<p>Valor: ${global.asa}</p>

39. @Named
CDI
@SessionScoped
public class LoggedUser {
private User user;
...
public String getUsername() {
return user.getUsername();
}
}
<p>Usuário Logado: ${loggedUser.username}</p>

40. E mais:
qualifiers CDI
stereotypes
interceptors (cdi)
custom scopes
proxies e Instance
portable extensions
classpath scanning

41. V4
baseado no cdi
compatível com vraptor3
integração com spring
ainda ideias, nada codado
aberto pra ideias!

42. V4
Responda a pesquisa sobre o
futuro do VRaptor e dê sua
opinião!
http://bit.ly/HWTKmO
@sergio_caelum
http://groups.google.com/group/
@paulo_caelum
caelum-vraptor-dev
@caelum