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

We covered a lot of different topics in this chapter. We looked at the feedback loop and its importance. The major takeaway is that it's very valuable to spend time to create your own feedback loop; measure everything, distill it into actionable takeaways, keep it as simple as possible.

Container images are a lightweight binary that contain everything needed to run as a container. Containers are just running instances of the images. Docker is a suite of software to manage the life cycle container instances. They provide services and Stack features to load balance services. Also, it is a great tool to test, develop, and deploy applications quickly and reliably.

Rapid growth in containers around the world led to the development of an open specification of easy interoperability of different vendor images on different runtimes—the open container initiative. Enterprise...