Jim Driscoll shows how to create Napili, a small program accepting user scripts to control a turtle using GroovyShell, the Binding, overriding behavior with set/getVariable and invokeMethod, and more.
Venkat Subramaniam shows how to implement several design patterns, including some GoF ones, using Groovy’s dynamic nature and closures.
Will Buck provides advice for those interested to upgrade their applications from Grails 1.x to 2.x.
Craig Atkinson presents the advantages of using the Geb functional testing library for creating robust and readable tests with both JUnit and Spock, and configuring Geb for testing across multiple browsers.
Burt Beckwith explains the general process of creating a Grails plug-in, the different types of plug-ins, and how to deploy, release and test them.
Burt Beckwith discusses performing transactions in Grails, covering services, customizing transaction attributes (isolation, propagation levels), two-phase commit, using JMS, and testing the code.
Ryan Vanderwerf explains how to create and deploy a Grails application on AWS VPC using various services such as RDS, S3, autoscaling, S3FS, EBS, etc.
Heather Miller presents attempts at better supporting distributed programming in Scala, including a new fast pickling framework designed for Scala, as well as Spores - composable pieces of mobile functional behaviour.
Graeme Rocher talks through the latest Async features offered by Grails and how they can be used to create non-blocking REST APIs.
Rob Fletcher explains how to use Vert.x, WebSockets, continuous unit testing and headless end-to-end testing to create one-page applications in Grails.
Marco Vermeulen showcases using BDD and Cucumber to develop GVM, an open source tool for managing parallel SDK versions.
Eugene Burmako introduces Scala macros, starting with the initial design and the actual release in production in Scala 2.10, addressing Scala macro system use cases and patterns.