Groovy 2 Cookbook

Over 90 recipes that provide solutions to everyday programming challenges using the powerful features of Groovy 2

Andrey Adamovich

Luciano Fiandesio

BIRMINGHAM - MUMBAI

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Groovy 2 Cookbook

Copyright © 2013 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

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First published: October 2013

Production Reference: 1151013

Published by Packt Publishing Ltd. Livery Place

35 Livery Street Birmingham B3 2PB, UK.

ISBN 978-1-84951-936-6

www.packtpub.com

Cover Image by Jarek Blaminsky (milak6@wp.pl)

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Credits

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About the Authors

Andrey Adamovich is a software craftsman with many years of experience in different lifecycle phases of software creation. He is passionate about defining good development practices, documenting and presenting architecture, the reuse of code and design patterns, the profiling and analysis of application performance, as well as extreme automation of development and operations activities.

He is a longtime Groovy user and has a deep knowledge of the language internals. He uses Groovy in his day-to-day development job for simplifying the development process, which includes: code generation, super cool DSLs, and rapid prototyping.

He has Master's degree in Computer Science from the Latvian State University.

I would like to thank my wife Lena for her patience and understanding that gave me enough time and energy to focus on the book. Many thanks to my friends, Sergey and Dmitry, who attentively reviewed book chapters and shared their insightful comments. And, of course, I'm very grateful to Luciano for the exciting experience we had together while working on this book.

Luciano Fiandesio is a programmer, technology enthusiast, and entrepreneur living in Zurich, Switzerland. Luciano has been working for the last 18 years in 12 different countries as an architect and developer for large corporations and small start-ups: Nokia, European Central Bank, BNP Paribas, and Ericsson are among his clients. He loves coding and designing solutions that are both elegant and rock solid. When not busy learning the next big thing, he likes playing with his analog cameras and cooking Italian food. Two years ago, he started a consulting company focused on software factory automation, Aestas IT, where Groovy plays a big role. He holds a Master's degree in Literature and Philosophy from

Rome University.

I'd like to thank Andrey, my business partner, friend, and co-author on this book; Laura, my life partner for her patience; Matteo, my brother, for his help; and Pierluigi for reviewing the book.

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About the Reviewers

Ayan Dave is a software engineer that takes pride in building and delivering high quality applications using languages and components in the JVM ecosystem. He is passionate about software development and enjoys exploring open source projects. He is enthusiastic about Agile and Extreme Programming, and frequently advocates for them. Over the years, he has provided a consulting service to several organizations and has played many different roles. Most recently, he is the "Architectus Oryzus" for a project team with big ideas, and he subscribes to the idea that running code is the system of truth.

He has a Master's degree in Computer Engineering from the University of Houston-Clear

Lake and holds PMP, PSM-1, and OCMJEA certifications. He is also a speaker on various technical topics at local user groups and community events. He currently lives in Columbus, Ohio, where he works with Quick Solutions Inc. In the digital world, he can be found at

http://daveayan.com.

Fergal Dearle has been writing code since he started writing BASIC as a bellbottom-wearing teenager in the 70s. The jeans aren't bellbottoms anymore and the code is in Groovy, not BASIC but he's still wearing jeans and he's still coding. Recently, he can be found mostly working on web-based projects in Groovy on Grails as his framework of choice. He is the author of Groovy for Domain Specific Languages and is a passionate advocate of Agile methods.

Eric Kelm is senior software developer with over nine years of experience as a developer, senior developer, and technical lead, delivering top-notch solutions to customers. His current focus is developing Java web applications, particularly with the Groovy-based Grails framework.

He holds a Bachelor's degree in Computer Science from the Sam Houston State University. Along with his day-to-day work, he also shares his insights into some of his technical solutions with a broader audience through his blog http://asoftwareguy.com.

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Guillaume Laforge is the project lead of the Groovy language. He works for Pivotal, formerly the SpringSource division of VMware. Guillaume co-authored the Groovy in Action best-seller, and speaks regularly about Groovy, Domain-Specific Languages, and various

Groovy related topics at conferences worldwide.

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