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CDI (JSR-299), Weld and the future of Seam
This talk introduces JSR-299: Contexts and Dependency Injection for the Java EE platform (CDI), the new Java standard for dependency injection and contextual lifecycle management. The talk covers the core programming model, explains its relationship to EJB 3.1 and JSF 2.0, and clarifies how it unifies and enhances the Java EE platform as a whole (extending to JPA, JAX-RS and JMS). You are then introduced to Weld, the JSR-299 reference implementation, and its servlet container extension. Finally, we look ahead at how a modularized Seam 3 ties into this new foundation as a set of portable CDI extensions, previewing several examples.
JSR-299: Contexts and Dependency Injection for the Java EE platform (CDI) is an elegant set of new services for Java that draws upon ideas from popular frameworks such as Seam and Guice and hooks into all the major specifications in the platform, including JavaServer Faces (JSF) 2.0, Enterprise Java Beans (EJB) 3.1, the Java Persistence API (JPA) 2.0 and JAX-RS 1.1. While many of the features provided by CDI--dependency injection, contextual lifecycle, configuration, interception, event notification--are familiar, the innovative use of meta-annotations is uniquely expressive and typesafe. This talk emphasizes the value in this approach.
Seam is a powerful open source development platform for building rich Internet applications in Java. Seam 3 is built on CDI and integrates technologies such as Java Persistence (JPA 2.0), Business Process Management (jBPM), Wicket, PDF and Excel reporting, Security and email into a unified full-stack solution, complete with sophisticated tooling.
In this discussion, Dan will talk about upcoming developments in Java EE 6 including CDI 1.0 and JSF 2.0 and how they set the foundation for Seam 3. This is a great opportunity to learn about how Red Hat is building on this new revision of the Java EE platform.
About Dan Allen
Dan Allen is a member of the Seam and Web Beans project teams at JBoss by Red Hat, author of Seam in Action and a frequent speaker at major industry conferences such as JavaOne, Devoxx, TSSJS, Jazoon and JSFOne. Dan is known for his passionate work, with nearly a decade of development experience using technologies that include Java frameworks (Seam, JSF, EJB3, Hibernate, Spring, Struts), testing frameworks (JUnit, TestNG), JavaScript and DOM scripting, CSS and page layouts, Maven 2, Ant, Groovy, and many others.
Quickly after graduating from college, Dan became captivated by the world of free and open source software (FOSS). His involvment in FOSS helped him transition into the software development industry. He soon discovered the combination of Linux and the Java EE platform to be the ideal blend on which to build his professional career. In his search for a robust Web framework, Dan discovered JBoss Seam, which was quickly granted this most coveted spot in his development toolbox. The rest, as they say, is history. Dan is also a dedicated open source and Linux advocate and blogs about his experiences regularly. You can keep up with his discoveries by subscribing to his blog at http://mojavelinux.com.
