Book Image

Microservices with Clojure

By : Anuj Kumar
Book Image

Microservices with Clojure

By: Anuj Kumar

Overview of this book

The microservice architecture is sweeping the world as the de facto pattern with which to design and build scalable, easy-tomaintain web applications. This book will teach you common patterns and practices, and will show you how to apply these using the Clojure programming language. This book will teach you the fundamental concepts of architectural design and RESTful communication, and show you patterns that provide manageable code that is supportable in development and at scale in production. We will provide you with examples of how to put these concepts and patterns into practice with Clojure. This book will explain and illustrate, with practical examples, how teams of all sizes can start solving problems with microservices. You will learn the importance of writing code that is asynchronous and non-blocking and how Pedestal helps us do this. Later, the book explains how to build Reactive microservices in Clojure that adhere to the principles underlying the Reactive Manifesto. We finish off by showing you various ways to monitor, test, and secure your microservices. By the end, you will be fully capable of setting up, modifying, and deploying a microservice with Clojure and Pedestal.
Table of Contents (18 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Components


Once the bounded contexts are identified for microservices and the organization structure is aligned, each microservice must be considered as a product that is tested, deployed, and scaled in isolation by the same team that developed it. A well-designed microservice must never expose its internal data model to the outside world directly. Instead, it must maintain a service contract that maps to its internal model such that it can evolve over time without affecting the dependent microservices.

Component-based software engineering (https://en.wikipedia.org/wiki/Component-based_software_engineering) defines a component as a reusable module that is based on the principles of SoC and encapsulates a set of related functions and data. In the context of microservices architecture, it is recommended to implement each service as a component that is independently swappable and deployable without affecting any other microservices.

Hexagonal architecture

Hexagonal architecture (http://alistair...