This video reviews the main features brought by Groovy 1.6 like better performance, multiple assignments, optional return, AST transformations, Grape, OSGi, etc. It discusses also what is most interesting and new in Groovy 1.7: anonymous classes, annotations, power asserts, AST viewer and builder. Finally, it presents Groovy 1.8: closures, modularization, Java 7 support, DSL, AST templates, better performance.
http://www.infoq.com/presentations/Groovy-Update

This is the first tutorial of an ongoing series of basic introductory lessons on using the Grails Framework.

Video producer: http://grails.org/screencast/show/24

This screencast demonstrates how to create Spock testing specifications. It covers creating basic when/then blocks, given/when/then blocks, expect/where blocks, and data tables.

Cucumber isn’t a tool exclusively for the Ruby world. The JVM is a very popular development platform and you can leverage your existing skills by automating your scenarios with Java or its expressive by closely related brother Groovy. This talk includes automating Cucumber scenarios with Groovy, from writing step definitions, working with tables, to exposing commonly used functionality with Cucumber’s World mixin. Driving acceptance tests with Geb (a Groovy DSL for Selenium) will get you started with automating your scenarios through a browser.
http://skillsmatter.com/podcast/agile-scrum/cuke-groovy

This video explains some of the Groovy syntax elements and its idioms by taking Java code examples and transforming them step by step into their more concise Groovy counterparts.
http://www.infoq.com/presentations/Transforming-to-Groovy

In this interview, Graeme Rocher and Guillaume Laforge of SpringSource talk about the present and future of the Grails framework and the Groovy language.
http://www.infoq.com/interviews/rocher-laforge-groovy-grails

Today writing portable Web applications that can use the power of the Comet technique is almost impossible: Tomcat, Jetty, and Grizzly/GlassFish application server all have their own set of private APIs. Atmosphere leverages and builds on Project Jersey and the Java API for RESTful Web Services (JAX-RS). Jersey is the open resource reference implementation of JAX-RS that makes it easier to build RESTful Web services. Atmosphere and Jersey complement each other, with the goal of making it easier to build Comet-based Web applications that include a mix of Comet and …