Grails in Action Review

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Grails in Action ReviewI've read both this book and the older Definitive Guide to Grails, Second Edition, and I'm happy to report that Grails in Action is both more concise and better-organized than that other (nonetheless excellent) tome. It is also slightly cheaper and, until Grails 1.2 is released (it's in early milestone as of this writing, so I wouldn't expect it to be production-ready before 2010), pleasingly up-to-date. There are very few errors, and if you find any, the authors will be happy to help you sort them out in the book's official forum.
The book's great strength is its organization. There's all kinds of online documentation for Grails, including a decent reference manual at grails.org, but searching through the mailing lists and the JIRA when the framework does something unexpected is no fun at all. Grails in Action starts off right with a primer on Groovy (which I found refreshing, even though I've read Groovy in Action), then jumps into practical Grails concepts, which it teaches by example. (The central project of the book, a low-budget Twitter clone, is an excellent showcase for Grails.) The later chapters introduce advanced concepts that are extremely useful but not covered (or not covered well) in Grails' documentation. For example, Chapter 13 tells you how to improve database performance by setting up and enabling EhCache; how to use p6spy and sqlprofiler to easily time your database queries; and how to migrate your database using Liquibase. Other chapters talk about concepts like REST and JMS with surprising clarity.
Whether you're a beginner or an experienced Grails developer, I'd say that this is the only Grails book you need.Grails in Action Overview
For web developers used to wrestling with Java and XML, Grails is a breath of fresh air. Developers are instantly productive, picking up all the benefits of the Ruby-based Rails framework without giving up any of the power of Java.

Grails in Action is a comprehensive look at Grails for Java developers. It covers the nuts and bolts of the core Grails components and is jam-packed with tutorials, techniques, and insights from the trenches.

The book starts with an overview of Grails and how it can help you get your web dev mojo back. Then it walks readers through a Twitter-style social networking app-built in Grails, of course-where they implement high-interest features like mashups, AJAX/JSON, animation effects, full text search, rounded corners, and lots of visual goodness. The book also covers using Grails with existing Java technology, like Spring, Hibernate, and EJBs.


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