In this chapter, you have learned how a microservice architecture recommends building a system as a collection of small and isolated services, where each service owns its own data and can be independently scaled to provide resilience to failure. These services interact with each other to form a cohesive system. This chapter was a quick introduction to Lagom, which is the new framework for developing reactive microservices on the JVM. There is far more to talk about when it comes to Lagom. It is a book on its own. Hopefully, this quick introduction has given you the appetite to go and learn more about it. You have seen how to enable Kotlin for the Lagom project, and now you can go on and utilize all the benefits of Kotlin to more quickly develop your next distributed system.

The last chapter of this book will be an introduction to concurrency. It will go over the terminology and how concurrency common problems can be solved in Kotlin. You will get to read about Akka and discover what...