Extend and enhance your Java applications with domain-specific scripting in Groovy
About This Book
Who This Book Is For
This book is for Java software developers who have an interest in building domain scripting into their Java applications. No knowledge of Groovy is required, although it will be helpful. This book does not teach Groovy, but quickly introduces the basic ideas of Groovy. An experienced Java developer should have no problems with these and move quickly on to the more involved aspects of creating DSLs with Groovy. No experience of creating a DSL is required.
What You Will Learn
The times when developing on the JVM meant you were a Java programmer have long passed. The JVM is now firmly established as a polyglot development environment with many projects opting for alternative development languages to Java such as Groovy, Scala, Clojure, and JRuby. In this pantheon of development languages, Groovy stands out for its excellent DSL enabling features which allows it to be manipulated to produce mini languages that are tailored to a project's needs.
A comprehensive tutorial on designing and developing mini Groovy based Domain Specific Languages, this book will guide you through the development of several mini DSLs that will help you gain all the skills needed to develop your own Groovy based DSLs with confidence and ease.
Starting with the bare basics, this book will focus on how Groovy can be used to construct domain specific mini languages, and will go through the more complex meta-programming features of Groovy, including using the Abstract Syntax Tree (AST). Practical examples are used throughout this book to de-mystify these seemingly complex language features and to show how they can be used to create simple and elegant DSLs. Packed with examples, including several fully worked DSLs, this book will serve as a springboard for developing your own DSLs.
Style and approach
This book is a hands-on guide that will walk you through examples for building DSLs with Groovy rather than just talking about "metaprogramming with Groovy". The examples in this book have been designed to help you gain a good working knowledge of the techniques involved and apply these to producing your own Groovy based DSLs.
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Fergal Dearle is a seasoned software development professional with almost 30 years' experience in software product development across a wide variety of technologies. He is currently the principal consultant with his own software development consulting company, Dearle Technologies Ltd., engaged in design, development, and architecture of new software products for client companies. Recent projects have included the integration of the Telegraph (http://www.telegraph.co.uk) into Apple's new Apple News application for iOS 9 and the reengineering of the G-Cloud Digital Marketplace for the United Kingdom Cabinet Office (https://www.digitalmarketplace.service.gov.uk). He is a committed mentor in his local CoderDojo in Wexford Town where he teaches Groovy to the young coding ninjas. He has been recently nominated as a CoderDojo Hero for his work. In the past, Fergal has worked in lead architect and developer roles for Candle Corporation on the OMEGAMON product, which is now part of IBM's Tivoli product suite, and as the development manager for Unix implementations of Lotus 1-2-3. In the early 1990s, Fergal led the team at Glockenspiel that developed CommonView, the first object-oriented UI framework for Microsoft Windows. The team was awarded one of the first ever Jolt Productivity Awards by Dr. Dobbs Journal.
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