Drools JBoss Rules 5.0 Developer's Guide

More Information
Learn
  • Write more efficient business rules, and work with the Rete algorithm, node indexing, node sharing, and parallelization
  • Create a WS-HumanTask-compliant WorkItem in a process (workflow)
  • Implement concurrency control in cross-cutting functionalities to manage code easily
  • Write human-readable rules, and Domain Specific Language for your rules to easily understand and verify them
  • Generate a stateful service by using a stateful knowledge session that maintains state between invocations and teaches you how to transactionally persist this service
  • Develop dynamic remote knowledge-base loading to change rules in your application without even stopping it
  • Prepare decision tables for calculating account interest rates
  • Integrate Drools within your Java business application, and integrate it with the Spring framework
About

Business rules can help your business by providing a level of agility and flexibility. As a developer, you will be largely responsible for implementing these business rules effectively, but implementing them systematically can often be difficult due to their complexity. Drools, or JBoss Rules, makes the process of implementing these rules quicker and handles the complexity, making your life a lot easier!

This book guides you through all of the features of Drools, such as dynamic rules, the event model, and Rete implementation with high performance indexing. It will help you to set up the JBoss Rules platform and start creating your own business. It's easy to start developing with Drools if you follow its real-world examples that are intended to make your life easier.

Starting with an introduction to the basic syntax that is essential for writing rules, the book will guide you through validation and human-readable rules that define, maintain, and support your business agility. As a developer, you will be expected to represent policies, procedures and. constraints regarding how an enterprise conducts its business; this book makes it easier by showing you it can be done.

A real-life example of a banking domain allows you to see how the internal workings of the rules engine operate. A loan approval process example shows the use of the Drools Flow module. Parts of a banking fraud detection system are implemented with Drools Fusion module, which is the Complex Event Processing part of Drools. This in turn, will help developers to work on preventing fraudulent users from accessing systems in an illegal way.

Finally, more technical details are shown on the inner workings of Drools, the implementation of the ReteOO algorithm, indexing, node sharing, and partitioning.

Features
  • Discover the power of Drools as a platform for developing business rules
  • Build a custom engine to provide real-time capability and reduce the complexity in implementing rules
  • Explore Drools modules such as Drools Expert, Drools Fusion, and Drools Flow, which adds event processing capabilities to the platform
  • Execute intelligent business logic with ease using JBoss/Drools, a stronger business-rules solution
  • Covers examples of a fraud detection system utilizing Drools CEP (Complex Event Processing) capabilities
Page Count 320
Course Length 9 hours 36 minutes
ISBN 9781847195647
Date Of Publication 12 Jul 2009

Authors

Michal Bali

Michal Bali, freelance software developer, has more than 8 years of experience working with Drools and has an extensive knowledge of Java, JEE. He designed and implemented several systems for a major dental insurance company. He is an active member of the Drools community and can be contacted at michalbali@gmail.com.