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Groovy 2 Cookbook

Groovy 2 Cookbook

4.2 (12)
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Groovy 2 Cookbook

Groovy 2 Cookbook

4.2 (12)

Overview of this book

Get up to speed with Groovy, a language for the Java Virtual Machine (JVM) that integrates features of both object-oriented and functional programming. This book will show you the powerful features of Groovy 2 applied to real-world scenarios and how the dynamic nature of the language makes it very simple to tackle problems that would otherwise require hours or days of research and implementation. Groovy 2 Cookbook contains a vast number of recipes covering many facets of today's programming landscape. From language-specific topics such as closures and metaprogramming, to more advanced applications of Groovy flexibility such as DSL and testing techniques, this book gives you quick solutions to everyday problems. The recipes in this book start from the basics of installing Groovy and running your first scripts and continue with progressively more advanced examples that will help you to take advantage of the language's amazing features. Packed with hundreds of tried-and-true Groovy recipes, Groovy 2 Cookbook includes code segments covering many specialized APIs to work with files and collections, manipulate XML, work with REST services and JSON, create asynchronous tasks, and more. But Groovy does more than just ease traditional Java development: it brings modern programming features to the Java platform like closures, duck-typing, and metaprogramming. In this new book, you'll find code examples that you can use in your projects right away along with a discussion about how and why the solution works. Focusing on what's useful and tricky, Groovy 2 Cookbook offers a wealth of useful code for all Java and Groovy programmers, not just advanced practitioners.
Table of Contents (17 chapters)
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Groovy 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Simplifying dependency management with Grape


Your nicely written and useful script can solve many interesting problems with the help of third-party libraries, and as long as it resides on your machine and has all the dependencies in place, it will work perfectly. However, at the point when you need to share it with your colleagues or community, you will realize that small and concise code requires several megabytes of additional libraries to be passed together with the script in order to make it work. Luckily, Groovy has a solution for that called Grape.

In this recipe, we will show you how to declare and automatically load Groovy script dependencies with the help of the wonderful Grape tool, which is integrated into Groovy.

Getting ready

Grape stands for the Groovy Adaptable (Advanced) Packaging Engine, and it is a part of the Groovy installation. Grape helps you download and cache external dependencies from within your script with a set of simple annotations.

How to do it...

If, in your script...

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