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Jess In Action
by Ernest Friedman-Hill


Manning Publications
1 edition
July 2003
480 pages

Reviewed by Michael Ernest, October 2003
  (9 of 10)


I first came across Jess in the late 90's, rummaging around the net. I could use the tools after a little work, but most of the comments and insights surrounding Jess seemed expert-driven, and I backed off the idea of using Jess to teach for the lack of material helpful to a beginner.

Jess in Action changes all that. It's a clean, well-written book. From my view anyone with some Java experience and some programming background could learn Jess and use it for complex projects by using this book. I found the principles of rules-based programming well laid-out, the examples engaging, and the flow very comfortable.

I found some very minor flaws in the presentation -- some forward references, a style that slips into jargon now and then -- but on the whole the book is useful. You'll read it more than once, if you grasp the power of the tool that's been put in your hands.

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Manning Publications
1 edition
July 2003
480 pages

Reviewed by Thomas Paul, August 2003
  (9 of 10)


This book is not about rules engines, although it does have a brief introduction to rules engines. This book is about Jess, a rule-based system written in Java. If you are interested in learning what kind of problems Jess can be used to solve and how to use Jess to solve these problems then this book will answer your questions.

The book is divided into two sections. The first section is a tutorial on Jess. This section covers the Jess syntax and demonstrates how to write rules for Jess. The tutorial is clearly written with some simple examples that do a good job of helping to make Jess understandable. The tutorial even shows how to do some optimizations for rules.

The rest of the book covers some fairly complicated applications written using Jess. The author refers to this section as a cookbook and the examples are complex enough and explained so well that it could easily serve this purpose. The best part of this section is that it will help someone who isn't familiar with rules engines develop ideas about how they might implement a rules engine to solve their own business requirements. The examples themselves cover integrating Jess with Java both in typical client based applications and J2EE web based applications.

If you are interested in using Jess as a possible solution to your business needs then this book is a virtual necessity. I couldn't imagine trying to use Jess without this book.

Discuss book in the Saloon More info at Amazon.com

 
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