Book Image

Scala Microservices

By : Selvam Palanimalai, Jatin Puri
Book Image

Scala Microservices

By: Selvam Palanimalai, Jatin Puri

Overview of this book

<p>In this book we will learn what it takes to build great applications using Microservices, the pitfalls associated with such a design and the techniques to avoid them. </p><p>We learn to build highly performant applications using Play Framework. You will understand the importance of writing code that is asynchronous and nonblocking and how Play leverages this paradigm for higher throughput. The book introduces Reactive Manifesto and uses Lagom Framework to implement the suggested paradigms. Lagom teaches us to: build applications that are scalable and resilient to failures, and solves problems faced with microservices like service gateway, service discovery, communication and so on. Message Passing is used as a means to achieve resilience and CQRS with Event Sourcing helps us in modelling data for highly interactive applications. </p><p>The book also shares effective development processes for large teams by using good version control workflow, continuous integration and deployment strategies. We introduce Docker containers and Kubernetes orchestrator. Finally, we look at end to end deployment of a set of scala microservices in kubernetes with load balancing, service discovery and rolling deployments. </p><p></p>
Table of Contents (12 chapters)

Summary

In this chapter, we deployed our Talent search engine application in production with kubernetes, with less than 500 lines of code. It shows the ease with which K8s cluster can be operated.

We saw that microservices are first-class citizens in K8s, which makes it a great fit for lagom and play applications.

The complex orchestration, life cycle management, and resource allocation of containers is abstracted out of our way. Scaling and rolling deployments are supported out of the box, letting your workload scale without any hiccups. Kubernetes lets us focus on our business logic and prevents us from worrying too much about the operation of it.