Book Image

Mastering Microservices with Java 9 - Second Edition

Book Image

Mastering Microservices with Java 9 - Second Edition

Overview of this book

Microservices are the next big thing in designing scalable, easy-to-maintain applications. They not only make app development easier, but also offer great flexibility to utilize various resources optimally. If you want to build an enterprise-ready implementation of the microservices architecture, then this is the book for you! Starting off by understanding the core concepts and framework, you will then focus on the high-level design of large software projects. You will gradually move on to setting up the development environment and configuring it before implementing continuous integration to deploy your microservice architecture. Using Spring security, you will secure microservices and test them effectively using REST Java clients and other tools like RxJava 2.0. We'll show you the best patterns, practices and common principles of microservice design and you'll learn to troubleshoot and debug the issues faced during development. We'll show you how to design and implement reactive microservices. Finally, we’ll show you how to migrate a monolithic application to microservices based application. By the end of the book, you will know how to build smaller, lighter, and faster services that can be implemented easily in a production environment.
Table of Contents (12 chapters)

Summary

In this chapter, you learned about reactive microservices or event-based microservices. These services work on messages/events rather than REST calls over HTTP. They provide asynchronous communication among services, which provide non-blocking communication and allow better usage of resources and failure handling.

We have made use of Apache Avro and Apache Kafka with Spring Cloud Stream libraries for implementing the reactive microservices. We have added the code in the existing booking-service module for producing the amp.bookingOrdered messages under the Kafka topic and added new module billing-service for consuming the same event.

You may want to add a new event for producers and consumers. You can add multiple consumers for an event or create a chain of events as exercise.

In the next chapter, you will learn to secure the microservices with respect to authentication...