Hi!
Often in your work you can come across with issues related to business logic. Let us assume that you have dozens of rules (for the time being in our project we have more than 50 and I used to work on a project where we had hundreds of those rules) that you have to implement, divide into some classes, subclasses, abstractions and of course unit test. This can be difficult and timeconsuming to both write and support. There are many ways of dealing with this problem and I will show you one of them - JBoss Drools.
Drools is a library specifically created for such purposes like implementing rules. As presented in Wikipedia:
"Drools is a rule engine implementaion based on Charles Forgy's Rete Algorithm tailored for the Java language."It contains a rule engine that can process rules wirtten using the Drools language (you can also provide rules in Excel spreadsheets! - perfect for Business side to support and maintain).
In the following example we will take a look at the way one can integrate JBoss Drools with Spring and an example of solving a similar problem without Drools.
