Book Image

Building Microservices with Micronaut®

By : Nirmal Singh, Zack Dawood
Book Image

Building Microservices with Micronaut®

By: Nirmal Singh, Zack Dawood

Overview of this book

The open source Micronaut® framework is a JVM-based toolkit designed to create microservices quickly and easily. This book will help full-stack and Java developers build modular, high-performing, and reactive microservice-based apps using the Micronaut framework. You'll start by building microservices and learning about the core components, such as ahead-of-time compilation, reflection-less dependency injection, and reactive baked-in HTTP clients and servers. Next, you will work on a real-time microservice application and learn how to integrate Micronaut projects with different kinds of relational and non-relational databases. You'll also learn how to employ different security mechanisms to safeguard your microservices and integrate microservices using event-driven architecture in the Apache Kafka ecosystem. As you advance, you'll get to grips with automated testing and popular testing tools. The book will help you understand how you can easily handle microservice concerns in Micronaut projects, such as service discovery, API documentation, distributed configuration management, fallbacks, and circuit breakers. Finally, you'll explore the deployment and maintenance aspects of microservices and get up to speed with the Internet of Things (IoT) using the Framework. By the end of this book, you'll be able to build, test, deploy, and maintain your own microservice apps using the framework.
Table of Contents (20 chapters)
Section 1: Core Concepts and Basics
Section 2: Microservices Development
Section 3: Microservices Testing
Section 4: Microservices Deployment
Section 5: Microservices Maintenance
Section 6: IoT with Micronaut and Closure

Working on restful microservices in the Micronaut framework

In order to learn about restful microservices in the Micronaut framework, we will continue working on the pet-clinic application. The following table summarizes the changes we will be making on each of the microservices in the pet-clinic application:

Table 3.1 – Microservices in the pet-clinic application

In each microservice, we will get hands-on with adding HTTP endpoints for performing CRUD operations on the data objects owned by them.

In our hands-on discussions, we will focus on the following:

  • DTOs: How DTOs can be used to encapsulate outgoing and incoming payloads for restful endpoints
  • Services: How services liaison with database repositories for any controller requests
  • Controllers: How controllers provide a standard restful interface for the external world in the Micronaut framework

Adding to Figure 2.2 of Chapter 2, Working on the Data Access, the following...