Book Image

Drools JBoss Rules 5.0 Developer's Guide

By : Michal Bali
Book Image

Drools JBoss Rules 5.0 Developer's Guide

By: Michal Bali

Overview of this book

<p>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!<br /><br />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.<br /><br />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.<br /><br />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.<br /><br />Finally, more technical details are shown on the inner workings of Drools, the implementation of the ReteOO algorithm, indexing, node sharing, and partitioning.</p>

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Drools JBoss Rules 5.0 Developer's Guide
Michal Bali
Jul, 2009 | 320 pages
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Table of Contents (22 chapters)
Drools JBoss Rules 5.0 Developer's Guide
Drools JBoss Rules 5.0 Developer's Guide
Credits
Credits
Foreword
Foreword
About the Author
About the Author
About the Reviewers
About the Reviewers
Preface
Preface
Free Chapter
1
Introduction
Introduction
Problems with traditional approaches
The solution
Drools
Alternatives to Drools
Summary
2
Basic Rules
Basic Rules
Rule basics
Rule syntax
Summary
3
Validation
Validation
Banking domain model
Problem definition
Analysis
Design
Validation package
Implementation
Validation service
Summary
4
Data Transformation
Data Transformation
Process overview
Getting the data
Writing transformation rules
Transformation results
Implementation of the data loading
Summary
5
Human-readable Rules
Human-readable Rules
Domain Specific Language
Decision tables
Drools Flow
Summary
6
Stateful Session
Stateful Session
Introduction to stateful session
Validation using stateful session
Summary
7
Complex Event Processing
Complex Event Processing
CEP and ESP
Drools Fusion
Fraud detection
Summary
8
Drools Flow
Drools Flow
Loan approval service
Loan approval ruleflow
Summary
9
Sample Application
Sample Application
Users
Architecture
Technologies used
Business logic
Design
Configuration
Repositories
Validation
Loan approval
Summary
10
Testing
Testing
How to write unit tests for rules
Rule integration testing
Rule acceptance testing
Static analysis of rules
Troubleshooting techniques
Summary
11
Integration
Integration
Dynamic KnowledgeBase loading
External artifact building
Drools execution server
Spring Framework integration
Standards
Summary
12
Performance
Performance
Rete algorithm
Node sharing
Node indexing
KnowledgeBase partitioning
Summary
Development Environment Setup
Development Environment Setup
Environment setup
Custom Operator
Custom Operator
Summary
Dependencies of Sample Application
Dependencies of Sample Application
Index
Index

About the Reviewers

James Taylor is CEO of Decision Management Solutions and one of the leading experts in decision management. James works with clients to develop effective technology solutions to improve business performance. He has over 20 years experience in developing software and is the foremost thinker and writer on decision management. James was previously a Vice President at Fair Isaac Corporation where he developed and refined the concept of enterprise decision management. The best known proponent of the approach, James is a passionate advocate of decision management.

James has experience in all aspects of the design, development, marketing, and use of advanced technologies including CASE tools, project planning, and methodology tools as well as platform development in PeopleSoft's R&D team and management consulting with Ernst and Young. He develops approaches, tools, and platforms that others can use to build more effective information systems.

James is the lead author of Smart (Enough) Systems: How to Deliver Competitive Advantage by Automating Hidden Decisions (Prentice Hall, 2007) and he has contributed chapters to The Decision Model (forthcoming), The Business Rules Revolution: Doing Business The Right Way, and Business Intelligence Implementation: Issues and Perspectives. James writes several blogs and his articles appear in industry magazines and on leading industry and technical web sites.

Sammy Larbi works as a programmer for desktop, web, console, and service applications using a diverse range of technologies, including Ruby, .NET, ColdFusion, Java, C/C++, and Perl. In addition to typical and atypical business domains, he also works in the field of bioinformatics and has a keen interest in artificial intelligence.

After many long years and sleepless nights since learning to program in his youth, he graduated with degrees in Computer Science and Political Science in 2004, and finished a master's degree in Computer Science in 2008.

Sam shares his thoughts about programming and software development online at his weblog, www.codeodor.com.

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