Java Application Architecture: Modularity Patterns with Examples Using OSGi

15. OSGi and Scala

Suppose that we want to implement the loan calculation so that it can execute in a highly concurrent environment. Scala is a functional language that excels in helping you create programs that run in a high concurrent environment. Let’s see how to do this.

The goal at this point is to replace the Java implementation of calc-impl.jar with a Scala implementation.

15.1. Getting Started

Just as refactoring our modules to OSGi didn’t require any coding changes, replacing calc-impl.jar will not require modifying our existing system. We did a good job creating Cohesive Modules with a Default Implementation. Independent Deployment was also a strength of our design. So, now that we want to create the Scala¹ module, we only need to write ...