Grain, groovy, howto technologies

Grain theme is a project that provides a layout-based skeleton for creating static websites by only adjusting the configuration and adding a content. This post shows how to use the theme template in order to create a custom Grain theme — starting from defining content files and page layouts, and up to building user-friendly, page-formatting tools.

Grails, plugin, configuration, howto technologies

This code snippet shows how to update project configuration settings from a Grails plugin executable script. The script changes the configuration by copying the settings from a default config file, placed in the plugin's folder, to the Config.groovy. This is usually very useful during a plugin installation when you need to provide some default configuration:

Groovy, java, educational technologies

Groovy is an object oriented dynamic language for the JVM. Dynamically compiled to a bytecode and interoperable with most Java libraries, Groovy is a perfect candidate for writing lightweight scripts that still can benefit from the Java ecosystem. Also, it is really easy to learn since the good old Java syntax is usually valid in Groovy. There are, however, a few caveats that you should be aware of before start coding. This post shows some specific features, and also gives a few suggestions which will help to write a clear, groovy-style code.

Grails, taglib, educational technologies

Grails tag libraries are designed to provide content formatting capabilities right on a GSP page. The 'tag' is an action that can be declared in a form of an HTML element. This action can accept an enclosed content and parameters defined as the element attributes to render a modified HTML. For instance, the following built-in tag iterates and renders each element of the list object using the template specified in the content:

Grails, test, educational technologies

Unit testing in Grails is currently implemented with Grails Testing plugin. The plugin provides unit testing facilities through the GrailsUnitTestCase class which offers a lot of useful methods for mocking Grails-specific objects. This post demonstrates how some of these methods can be used to test Grails domain classes and services.