Drools Developer’s Cookbook

Lucas Amador

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Overview

Table of Contents

The Author

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Master the newest Drools Expert, Fusion, Guvnor, Planner and jBPM5 features
Integrate Drools by using popular Java Frameworks
Part of Packt’s Cookbook series: each recipe is independent and contains practical, step-by-step instructions to help you achieve your goal.

Book Details

Language : English
Paperback : 310 pages [ 235mm x 191mm ]
Release Date : January 2012
ISBN : 1849511969
ISBN 13 : 978-1-84951-196-4
Author(s) : Lucas Amador
Topics and Technologies : All Books, Cookbooks, JBoss, Open Source

Preface
Chapter 1: Expert: The Rule Engine
Chapter 2: Expert: Behind the Rules
Chapter 3: Guvnor: Centralized Knowledge Management
Chapter 4: Guvnor: Advanced Features and Configuration
Chapter 5: Fusion: Processing Complex Events
Chapter 6: Executing Drools Remotely
Chapter 7: Integration: How to Connect Drools
Chapter 8: Planner: Optimizing Your Automated Planning
Chapter 9: jBPM5: Managing Business Processes
Index

Preface

Chapter 1: Expert: The Rule Engine

Introduction
Declaring facts in the engine
Declaring facts using XML
Adding logging to view rules execution behavior
Using timer-based rules
Implementing calendar-based rules
Monitoring query changes in real time

Chapter 2: Expert: Behind the Rules

Introduction
Marshalling knowledge sessions
Using persistence to store knowledge
How to discard duplicated facts on insertion
Using a custom classloader in a knowledge agent
Verifying the quality of rules with the Drools Verifier
Monitoring knowledge with JMX

Chapter 3: Guvnor: Centralized Knowledge Management

Introduction
Creating our model definition with the Model Editor
Importing our model definition
Creating data enumerations
Using From Collect patterns in the Guided BRL Editor
Organizing knowledge with Working Sets
Creating rules templates
Creating knowledge snapshots

Chapter 4: Guvnor: Advanced Features and Configuration

Introduction
Setting and creating a GUI language
Backing up your knowledge
Configuring MySQL as the default rules repository
Configuring the repository files location
Obtaining resources using the REST API

Chapter 5: Fusion: Processing Complex Events

Introduction
How to declare our facts as events
Testing our application using a pseudo-clock
Entry-points: What they are and how we can use them
Setting up event stream processing mode
Sliding Windows
Event correlations using temporal operators

Chapter 6: Executing Drools Remotely

Introduction
Knowledge services and multiple endpoints configuration
Deploying the Drools Server in JBoss AS 5.x
Creating commands with XStream marshallers
Using the REST interface to execute commands
Testing the SOAP interface with soapUI

Chapter 7: Integration: How to Connect Drools

Introduction
Setting up Drools using Spring Framework
Configuring JPA to persist our knowledge with Spring Framework
Integrating Apache Camel in your project
Configuring Apache Camel with Spring Framework
Executing Drools commands from a JMS queue

Chapter 8: Planner: Optimizing Your Automated Planning

Introduction
Solving a resource assignment problem
Using a Simulated Annealing acceptor
Terminating the Solver
Creating a basic benchmarker

Chapter 9: jBPM5: Managing Business Processes

Introduction
Creating a business process manually
Testing your business processes
Creating and executing human tasks
Monitoring a process activity and creating reports
Monitoring a business process with Drools Fusion

Index

Lucas Amador

Lucas Amador is a Software Developer born and raised in Buenos Aires, Argentina. His Open Source interest started since young. However, he finally got fully involved in 2008 while working with a JBoss partner and providing consultancy and developing software using the JBoss middleware platform for telco, financial and other such companies. At this time he obtained the Sun Java Developer and JBoss Advanced Developer certifications. He started getting involved in the JBoss Drools community through the Google Summer of Code 2009 program by implementing a refactoring module for the Eclipse Drools Plugin, and since then he is a jBPM5/Drools committer where spend his time implementing new features and fixing bugs. Lucas works as a freelance developer and is always looking something interesting to work in.

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Sample chapters

You can view our sample chapters and prefaces of this title on PacktLib or download sample chapters in PDF format.

Find your book in our support section to find errata and to download code samples.

What you will learn from this book

Use Drools Guvnor for rules authoring and configuration
Configure different ways to store your knowledge using Marshallers, and JPA with Spring
Understand how to add complex event processing capabilities to a project
Take full advantage of the remote rules execution using the Drools Server.
Integrate Drools with the Apache Camel Project using the Spring Framework
Monitor Drools knowledge bases and sessions using JMX.
Implement automated planning using Drools Planner
Migrate and learn new features included in jBPM5.

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In Detail

JBoss Drools is an open source business rules engine that provides agility and flexibility to your business logic. Drools 5 has evolved to provide a unified and integrated platform for business rules, business processes, event processing and automated planning. With this book in hand you will be able to use any of these modules and their specific features quickly and with ease.

Drools Developer Cookbook will help you to apply the latest community features to your projects. You will learn about all the Drools modules - Guvnor, Fusion, Expert, and Planner - along with jBPM5 and integration capabilities. The straightforward recipes will help you to implement even more rules in your projects and take you to a new level with the Drools platform.

This book teaches you how to create a more robust business rules implementation, starting with tips on how to write business rules manually, or by using the newest Guvnor rule editors. You will learn how your rules can be integrated with another framework to create a full solution and discover how to use complex features such as event processing. The recipes cover all of the Drools modules and will help you to solve problems with planning, remote execution, and much more.

Approach

Part of Packt’s cookbook series, this book is packed with easy to follow recipes containing step-by-step instructions. The book is designed in such a way that you can read it chapter by chapter, or refer to the tasks in no particular order.

Who this book is for

This book is for Drools developers who want to improve their current working methods and discover new features to apply to their projects. Readers are expected to be familiar with the basics of the Drools platform as well as Java.