Gwt cdi jud_con_berlin
- 1. GWT & CDI Heiko Braun <hbraun@redhat.com>
- 2. Topics • CDI & GWT • Use Cases & Requirements • Relevant Concepts • Likeminded Technologies • Demo
- 3. GWT & CDI
- 4. Google Web Toolkit • Create Ajax applications from Java sources • GWT SDK: Compiler, API, Tools • Creates highly optimized, portable javascript code
- 5. Context and Dependency Injection • CDI: JSR-299, JSR-330 • Reference implementation: Weld • Seam 3 • EE6 component model • Portable extensions • shrink-size or extend runtime (framework)
- 7. Use Cases • Invoke CDI beans from GWT clients • RPC • Pub/Sub • Eventing • Expose domain models to GWT clients • Serialization
- 10. Requirements • “Seamless integration” • Verified concepts • Concise programming model • Reduction of boilerplate
- 14. Beans, Qualifiers & Scopes • Bean type: Client-visible type (class, interface) • Qualifier: Distinguish multiple beans of the same type • @Named, @Asynchronous • Scope: Determines instance lifecycle • @SessionScoped, @ConversationScoped, @RequestScoped
- 15. Build & Run-time • Run-time • Build-time • Deployment • Same Origin Policy? • GWT Compiler constraints • Transactions, Security • Domain model & API? • Context propagation? • Clustering, Failover • Hosted Mode • Stateful Ajax Client? • CDI Bootstrap? • Deferred Binding • Boiler plate Java Javascript
- 16. Example: Conversation Scoped Bean
- 17. Example: Client managed conversation (1)
- 18. Example: Client managed conversation (2)
- 20. Related Technologies • JPA • Serialization • Detachment (lazy/eager loading) • Merging • DataBinding • Widgets, Validation, Synchronization • JMS • Ajax client as Topic Subscriber/Publisher
- 22. Errai & Weld • Errai acts as Umbrella (http://jboss.org/errai) • Weld as Reference implementation • Driven by both Errai and CDI Team • Same runtimes Weld supports: • SE, Servlet, EE6, EC2: “Start POC, grow big”
- 23. Questions? • Project: http://jboss.org/errai • Weld: http://seamframework.org • Blog: http://errai-blog.blogspot.com/ • IRC: irc.freenode.net#errai