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Microservices with Clojure

You're reading from   Microservices with Clojure Develop event-driven, scalable, and reactive microservices with real-time monitoring

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781788622240
Length 336 pages
Edition 1st Edition
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Author (1):
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Anuj Kumar Anuj Kumar
Author Profile Icon Anuj Kumar
Anuj Kumar
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Table of Contents (13) Chapters Close

Preface 1. Monolithic Versus Microservices 2. Microservices Architecture FREE CHAPTER 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 12. Other Books You May Enjoy

Using Kafka for Helping Hands


The Helping Hands application uses Apache Kafka to implement the observer model and send asynchronous events among microservices. It is also used as an event store to capture all the state change events generated from microservices that are consumed by the Lookup service to build a consolidated view to server lookup requests. The Alert microservice of the Helping Hands application also receives the alert events via the Kafka topic and sends an email asynchronously.

Apache Kafka includes five core APIs:

  • The Producer API allows applications to publish streams of events to one or more topics
  • The Consumer API allows applications to consume published events from one or more topics
  • The Streams API allows transforming streams from input topics and publish the results to output topics
  • The Connect API allows support for various input and output sources to capture and dump stream of events
  • The AdminClient API allows topics and server management along with other Kafka management...
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