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

Building the container artifacts

To deploy any application, the first step is to build all the required artifacts. And building an artifact typically involves checking out the source code and compiling and creating a deployable artifact. In regard to microservices, often, this deployable form is a Docker container image. Docker images have elegantly decoupled the runtime topology requirements. A Docker image is platform agnostic and can be deployed to any host machine that runs Docker. In the next section, we will dive into how to build Docker images for the microservices in our pet-clinic application.

Containerizing the Micronaut microservices using Jib

Jib is a containerizing framework from Google that can seamlessly tie with Java build frameworks such as Maven or Gradle to build container images. Jib has hugely simplified the process to create container (Docker) images. Let's quickly see the workflow without Jib to create a Docker image: