Summary

The JBoss BRMS application helps users to solve problems in a declarative manner with business rules. In this chapter, we presented the major differences between declarative and imperative programming. Imperative programming models define and reuse the control flow and the runtime engine is instructed step by step how to solve a problem; while in the declarative programming model users tell the runtime engine how to solve the problem. JBoss BRMS helps users organize, author, and maintain business rules. We covered a step-by-step BRMS installation, rule authoring, and testing. We implemented various business rules, including a decision table. We exposed a real-time decision server to serve money transfer fees on a REST interface using pricing rules defined by a decision table. We concluded the chapter by looking at complex event processing with a fraud detection example...