This document discusses the new features of Java EE 6, including Servlet 3.0, JAX-RS 1.1, JSF 2.0, JSR-330 (Dependency Injection), JSR-299 (CDI - Contexts and Dependency Injection), and CDI extensions. It provides examples of using these technologies in a sample e-commerce application called NovaShop, highlighting aspects like asynchronous servlets, RESTful web services, managed beans, dependency injection, and CDI extensions.

1. Java EE 6
All Platform, no clutter
@greyfairer

2. Agenda
Servlet 3.0, JAX-RS 1.1, JSF 2.0
JSR-330 a.k.a. javax.inject
JSR-299 a.k.a. CDI
Arquillian
CDI Extensions

3. Servlets 3.0
@WebServlet(name=”MyServlet”,
urlPatterns={”/myApp/*”})
public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest req,
HttpServletResponse res)
{
...
@WebFilter( filterName="PaymentFilter",
urlPatterns={"/*"},
servletNames={"PaymentServlet"},
)
public class PaymentFilter implements Filter {
...

4. Modular war's
● Jar's in WEB-INF/lib can also contain annotated
servlet/filter/listener classes
● Jar's can also contribute META-INF/web.xml
● <web-fragment>...</web-fragment>
● Jar's can also contribute jsp's, static html
● In META-INF/resources

5. Servlet 3.0 and CDI
● If you have a WEB-INF/beans.xml, Web
archives will be scanned for Managed Beans
● Can be injected in servlets, JAX-RS, JSF beans
EJB CDI JPAJSF ...
@Stateful
@Stateless
@Singleton
@Produces
@Named @Entity
@Managed
Bean ...
EJB

6. Asynch Servlets
@WebServlet(name="AsyncServlet", asyncSupported=true)
public class AsyncServlet extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) {
final AsyncContext ac = request.startAsync();
ac.setTimeout(...)
ac.start( new Runnable(){
ac.getResponse().getWriter()...;
ac.complete();
});

7. Demo: Chat servlet
● Glassfish: asynch-request-war sample

8. JAX-RS 1.1
● RESTfull Web Services
● Typical use: javascript clients
● GET/POST/PUT/DELETE resources
● URL encodes resource identification
● Encoding defined by MIME headers
● Class and/or method annotated with @Path
● Automatic JSON/XML encoding using JAXB

9. Demo: novashop
● From Adam Bien hacks
● http://kenai.com/projects/javaee-patterns/sources/hg/show/hacks/NovaShop
● @Path, @PathParam, @Produces, @Consumes annotation on WorkshopRegistration
● Use Chrome Advanced Rest Client

10. JSF 2.0
● .xhtml view technology
● Uses JEE6 managed POJO’s
● @RequestScoped, @ConversationScoped, @Named
● New: call any method, even with parameters.
● Controllers: method calls on managed beans
● Bind form fields to bean properties
– Typically @RequestScoped beans
● Implicit navigation using method’s returned value
● Redirect after post: ?faces-redirect=true

11. JSF 2.0 in Java EE 6
● Supports javax.validation
● All @Named CDI beans are accessible
● Custom Components will use JAX-RS

12. Demo: novashop 2
● From Adam Bien hacks
● http://kenai.com/projects/javaee-patterns/sources/hg/show/hacks/NovaShop
● Index.xhtml, registered.xhtml

13. JSR-330 a.k.a. javax.inject
● @Inject, @Qualifier, @Scope, etc.
● Standardized Dependency Injection API
● Reference Implementation: Google Guice 2.0
● Also supported by Spring since 3.0
● Defines API, not injector implementation or
configuration

14. JSR-299 a.k.a. CDI
● Standardized dependency injection behaviour
and configuration
● Required feature of any Java EE 6 container,
including Web profile
● javax.enterprise.* package
● @Produces (evt. with InjectionPoint)
● Instance<> and @Alternative
● Event<> and @Observes

15. Demo: novashop 3
● Configurator for maxNumberOfRegistrations

16. CDI Extensions
● CDI has Service Provider Interfaces
● Allows extensions drop-in
● http://groups.diigo.com/group/cdi-extensions
● Seam 3 and others
● https://github.com/CDISource/cdisource
● @Spring Spring to CDI bridge
● CDI to Spring: use JNDI Lookup.

17. Q & A