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

Integrating with a relational database using a persistence (MyBatis) framework

MyBatis is a Java persistence framework. Unlike Hibernate (an ORM framework), MyBatis does not support the direct mapping of Java objects to the database but instead maps Java methods to SQL statements.

MyBatis is commonly used in migration or transformational projects where a legacy database(s) already exists. Since a lot of tables, views, and other data objects are already defined and used in the database, it may not be an ideal scenario to refactor and normalize these table/view definitions to map them directly to Java objects (using an ORM framework). MyBatis offers an ideal way of mapping Java methods to SQL statements. These SQL statements, which manage any CRUD access thereof, are defined in an XML mapper or POJO mapper using MyBatis annotations.

Furthermore, as an ORM framework (such as Hibernate) manages child entities on its own and hides the SQL part completely, some developers prefer to...