Book Image

Cloud-Native Applications in Java

By : Andreas Olsson, Ajay Mahajan, Munish Kumar Gupta, Shyam Sundar S
Book Image

Cloud-Native Applications in Java

By: Andreas Olsson, Ajay Mahajan, Munish Kumar Gupta, Shyam Sundar S

Overview of this book

Businesses today are evolving so rapidly that they are resorting to the elasticity of the cloud to provide a platform to build and deploy their highly scalable applications. This means developers now are faced with the challenge of building build applications that are native to the cloud. For this, they need to be aware of the environment, tools, and resources they’re coding against. If you’re a Java developer who wants to build secure, resilient, robust, and scalable applications that are targeted for cloud-based deployment, this is the book for you. It will be your one stop guide to building cloud-native applications in Java Spring that are hosted in On-prem or cloud providers - AWS and Azure The book begins by explaining the driving factors for cloud adoption and shows you how cloud deployment is different from regular application deployment on a standard data centre. You will learn about design patterns specific to applications running in the cloud and find out how you can build a microservice in Java Spring using REST APIs You will then take a deep dive into the lifecycle of building, testing, and deploying applications with maximum automation to reduce the deployment cycle time. Gradually, you will move on to configuring the AWS and Azure platforms and working with their APIs to deploy your application. Finally, you’ll take a look at API design concerns and their best practices. You’ll also learn how to migrate an existing monolithic application into distributed cloud native applications. By the end, you will understand how to build and monitor a scalable, resilient, and robust cloud native application that is always available and fault tolerant.
Table of Contents (20 chapters)
Title Page
Packt Upsell


Let's review the key concepts of the cloud applications that we have discussed so far. We made our application lightweight by making it run on a servlet engine and start in less than 15 seconds. Our application is self-contained, as the fat JAR has all libraries to run our service. We just need a JVM to run this JAR file. It has externalized configuration (to some extent) by injecting environment from the command line and properties from application.yml and bootstrap.yml. We take a deeper look at the next stages of externalization in Chapter 7, Cloud-Native Application Runtime. The Spring actuator helped capturing all metrics and made their URL available for consumption, thus enabling instrumentation. The location abstraction was implemented by Eureka.

In the next chapters, we will enhance this service by adding to it a data tier and resiliency, and adding cache behavior and other enhancements that we skipped in this chapter.