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

Chapter 4. Extending Your Cloud-Native Application

Having understood the design principles, let's take the skeleton services developed in Chapter 2, Writing Your First Cloud-Native Application, and do some real work on them to make them production-ready.

We defined two get services; getProduct for a given a product ID, and getProducts for a given category. These two services have highly non-functional requirements. They always have to be available and serve the data with the lowest possible latency. The following steps will take us there:

  1. Accessing data: Service access to data across various resources
  2. Caching: Options to do caching and their considerations
  3. Applying CQRS: Enable us to have different data models to service different requests
  4. Error handling: How to recover, what return codes to send, and implementation of patterns such as a circuit breaker

We will also look at adding methods to modify the data, such as insert, update, and delete. In this chapter, we will cover:

  • Validations: Ensuring...