Part 1. Programming beyond Hello World

Welcome to enterprise OSGi! In this first part, you’ll get a feel for the modularity of OSGi bundles, programming web applications, accessing data in a database, controlling the flow of transactions, and packaging bundles into a single unit.

Chapter 1 starts off gently by introducing OSGi and explaining why modularity—which is what OSGi provides—is so important.

If you’re itching to get coding, don’t worry. Chapter 2 shows you how to develop your first enterprise OSGi application. You’ll write a modular web application and connect it to OSGi services using JNDI and Blueprint dependency injection.

Having mastered the frontend, what about the backend? Chapter 3 shows you how to use JPA persistence and JTA transactions in an OSGi environment.

Chapter 4 discusses how to package OSGi bundles together into OSGi applications.

By the time you’ve finished reading this part, you’ll be able to write your own enterprise OSGi application, with a web frontend and a transactional database backend. It will be loosely coupled and nicely modularized. And best of all—writing it will be easy!