Book Image

Mastering JBoss Drools 6

By : Mariano De Maio, Mauricio Salatino, Esteban Aliverti
Book Image

Mastering JBoss Drools 6

By: Mariano De Maio, Mauricio Salatino, Esteban Aliverti

Overview of this book

Mastering JBoss Drools 6 will provide you with the knowledge to develop applications involving complex scenarios. You will learn how to use KIE modules to create and execute Business Rules, and how the PHREAK algorithm internally works to drive the Rule Engine decisions. This book will also cover the relationship between Drools and jBPM, which allows you to enrich your applications by using Business Processes. You will be briefly introduced to the concept of complex event processing (Drools CEP) where you will learn how to aggregate and correlate your data based on temporal conditions. You will also learn how to define rules using domain-specific languages, such as spreadsheets, database entries, PMML, and more. Towards the end, this book will take you through the integration of Drools with the Spring and Camel frameworks for more complex applications.
Table of Contents (18 chapters)
Mastering JBoss Drools 6
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Architecture considerations


The first thing we will need to address when designing how Drools should interact with the rest of our application components is how they will fit in the overall architecture; we will have specific requirements regarding how data will be fed into the rule engine, either from our own application or from external sources. Also, we must decide how information should be published back to our application from the rule engine, or how it should be exposed to external applications. We've already seen many mechanisms throughout previous chapters to communicate between Drools and the rest of the application (to name a few):

  • We can use global variables to send and receive information outside the Kie Session, and to communicate with different systems. These global variables could represent any Java component, from simple lists, to database accessors, to web service client stubs, allowing the session to communicate with any part of our infrastructure.

  • We can use entry points...