Seam 3 is an enterprise Java platform based on Java EE 6 and CDI that provides additional features like internationalization support, integration with Java EE technologies like JSF and EJB, and extensions to standards like adding request parameters to JSF. Seam originated many ideas that became part of Java EE standards, and it aims to make Java EE development easier and more productive while staying aligned with Java standards.

1. SEAM 3
a Web developer’s view
Matija Mazi, Parsek

3. What is Seam 3?
• Enterprise Internet application
platform
• Based on Java EE 6
– Especially CDI

4. Agenda
• Java EE 6 Example App
• Seam 3 Example App
• Seam and Java Standards
• Contributing to Seam

5. Java EE 6: Our example
• Web Application Technologies
– JSF (JavaServer Faces) 2.0 with Facelets
– EL (Expression Language) 2.2
• Enterprise Technologies
– CDI 1.0 (Contexts & Dependency Injection)
– EJB 3.1 (Enterprise JavaBeans)
– JPA (Persistence) 2.0
– Bean Validation 1.0

6. Java EE 6: Our example
• Let’s see the demo!

7. Java EE 6: What we used
• General (javax.annotation.*) • JPA (javax.persistence)
– @PostConstruct – EntityManager
– CriteriaBuilder, CriteriaQuery
• EJB3 (javax.ejb) – @Entity
– @Stateful – @Id
– @GeneratedValue
– @PersistenceContext
• CDI (javax.enterprise.*)
– @RequestScoped
– @Event • Validation (javax.validation.*)
– @Observes – @NotNull
– @Model – @Pattern
– @Produces – @Size
• CDI (javax.inject.*)
– @Inject
– @Named

8. Seam 3: Our example
• Let’s see the demo!

9. Seam 3: Features (1/2)
• Forge • Seam Configuration
– Plugins
• Seam Persistence
• Seam Solder – Transaction Management
– @Veto, @Requires, @Exact, – Seam-managed persistence
@Client, @Named packages, contexts
@FullyQualified
– Annotation Literals
– Evaluating EL • Seam Servlet
– Resource Loading – Servlet/Session events
– Logging – Injectable Servlet objects and
request state
– Reference to the BeanManager
– @RequestParam,
– Properties @HeaderParam,
– @Unwraps @ContextPath,
– Default Beans @CookieParam, @ServerInfo,
– Generic Beans @Principal
– Service Handler

10. Seam 3: Features (2/2)
• Seam Security • Seam Catch
• Seam Remoting
• Seam International • Seam REST
– Locales, Timezones • Seam Validation
– Messages • Seam Wicket
• Seam Cron
• Seam Faces
• Seam Drools
– Faces Events Propagation
– Faces Artifact Injection • Seam Errai CDI (GWT)
– Messages • Seam JCR (Content Repo)
– @RenderScoped, • Seam JMS
@ViewScoped, Flash • Seam Mail
– <s:validateForm>,
<s:viewAction> • Seam Reports
• Seam Social
• Seam Spring

11. Seam: a source of ideas
for JavaEE standards

12. Seam: a source of ideas
for JavaEE standards
(stuff in JEE6 that came from Seam)
• CDI (JSR 299) • JSF 2 (JSR 314)
– @Inject – Navigation
– @*Scoped – <f:viewParam>
– @Produces – <f:selectItems>
– Events – Get Requests
– Most of the stuff, really • <h:link>, <h:button>
– Scopes
• CDI 1.1 (JSR 346) – Annotations
• Managed Beans
– from Seam 3
• Converters/Valitators
• esp. Seam Solder
– Resources
– Validation integration
– EL method parameters

13. Contributing to OS
• github account
• git installed
• No need for commit permissions
• https://github.com/seam/international/pull/11

14. Seam 3 and JavaEE 6
• Thank you!
mazi@parsek.net

15. Seam 3: Our Example
• Seam International • Seam Cron
– Messages – Scheduled tasks
• Seam Faces • Seam Mail
– Messages – Mail templates
– @Inject in Validators – Mail sending
• Seam Solder
– Resource Loading