Delivering the rich web at low cost: Bidirectional client/server messaging in GWT

End users now expect to be presented with real time data in a web application. But these rich experiences are complex to develop. Tools like GWT enable efficient development of high-performance, rich web applications by shielding developers from JavaScript, browser quirks and evolving markup languages. However, GWT only addresses the client-side environment. Developers need a similar abstraction for exchanging real time data with the server.

Errai, an open-source GWT extension framework, streams data asynchronously over a high-performance, bidirectional messaging bus. Errai's bus runs concurrently in the browser and on the server (inside a Java Servlet). Errai's push technology delivers data from the server to any connected browser simultaneously and in real time, while the method of communication is transparent to the developer.

Errai also brings CDI, the standard Java programming model, to the browser. What, CDI in the browser? Yep, in JavaScript. This means the developer can use a single programming model for both client and server-side development. To take it a step further, Errai hooks the CDI event notifications to its messaging bus, hiding the high-performance messaging behind CDI's declarative event model. Client or server, it's all just CDI programming.

Come learn how the GWT, Errai and CDI stack enable you to create rich applications that process real time data without all the complexity.

About Dan Allen

As Principal Software Engineer at JBoss, by Red Hat, Dan serves as the JBoss Community liaison, leads the JBoss Testing Initiative and is a member of the Seam, Weld, Arquillian and ShrinkWrap projects. He authored Seam in Action (Manning), served as a representative for Red Hat on the JSR-314 Expert Group (JSF 2.0), writes for IBM developerWorks and NFJS magazine and is an internationally recognized speaker. He's appeared at major industry conferences including JavaOne, Devoxx, NFJS, JAX and Jazoon and has received recognition as a JavaOne Rock Star, a JBossWorld Top Presenter and a JAX Hall of Fame speaker.

To colleagues, Dan's known for his hard work and passion for Open Source technologies. His technical expertise includes Java frameworks (Seam, CDI, Weld, JSF, EJB 3, JPA, Hibernate, Spring), testing frameworks (Arquillian, JUnit, TestNG, Selenium), build tools (Maven 2, Gradle, Ant) and web development (Ajax, JavaScript, CSS) and more.

You can keep up with Dan's discoveries by reading his blogs at http://mojavelinux.com and http://community.jboss.org/people/dan.j.allen/blog or tracking what he's currently up to by following him on Twitter at http://twitter.com/mojavelinux.

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