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

Monolithic application to distributed cloud-native application

The advent of the J2EE specification coupled with application servers providing the requisite services led to the design and development of monolithic applications:

Some of the characteristics of the monolithic application and its ecosystem are:

  • Everything is packaged into a single .ear file. The single .ear file requires a multi-month test cycle, which results in a reduced velocity of change in production. Typically, a big push to production once or twice a year.
  • Application build complexity is very high with dependencies across various modules. At times, there is a clash between the versions of the JAR files used by the application.
  • Reuse between application is primarily performed by sharing .JAR files.
  • Huge bug and feature databases—from a backlog perspective, there are many feature sets/bugs across the various application modules. At times, some of the backlogs might be at loggerheads with each other.
  • User acceptance criteria usually...