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Microservices with Clojure

You're reading from Microservices with Clojure

Product type Book

Published in Jan 2018

Publisher Packt

ISBN-13 9781788622240

Pages 336 pages

Edition 1st Edition

Languages

Concepts

Author (1):

Anuj Kumar

Table of Contents (18) Chapters

Title Page

Dedication

Packt Upsell

Contributors

Preface

1. Monolithic Versus Microservices

2. Microservices Architecture

3. Microservices for Helping Hands Application

4. Development Environment

5. REST APIs for Microservices

6. Introduction to Pedestal

7. Achieving Immutability with Datomic

8. Building Microservices for Helping Hands

9. Configuring Microservices

10. Event-Driven Patterns for Microservices

11. Deploying and Monitoring Secured Microservices

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Index

Data management

In a microservices-based architecture, the data model and schema must not be shared among bounded contexts. Each microservice must implement its own data model backed by a database that is accessible only through the service endpoints. Microservices may also publish events that can be considered as a log of the changes the service applies to its isolated database. Keeping application data up to date across microservices may also add to the network overhead and data duplication.

Direct lookup

Although microservices have their own isolated persistence, an application implemented using microservices may need to share data among a set of services to perform tasks. In a monolithic environment, since there is a common database, it is easier to share data and maintain consistency using transactions. In a microservices environment, it is not recommended to provide direct access to the database managed by a service, as shown in the following diagram:

For example, when a user places a...

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Authors (1)

Anuj Kumar

Anuj Kumar is the co-founder and chief architect of FORMCEPT, a data analytics startup based in Bangalore, India. He has more than 10 years of experience in designing large-scale distributed systems for storage, retrieval, and analytics. He has been in industry hacking, mainly in the area of data integration, data quality, and data analytics using NLP and machine learning techniques. He has published research papers at ACM conferences, got a few patents granted, and has spoken at TEDx. Prior to FORMCEPT, he has worked with the Oracle Server Technologies division in Bangalore, India.

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