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)
1
Section 1: Core Concepts and Basics
3
Section 2: Microservices Development
8
Section 3: Microservices Testing
10
Section 4: Microservices Deployment
13
Section 5: Microservices Maintenance
15
Section 6: IoT with Micronaut and Closure

Securing service endpoints using session authentication

In session-based authentication, the user state is stored at the server side. When a user logs in to the server, the server starts the session and issues a session ID in a cookie. The server uses the session ID to uniquely identify a session from the session quorum. Any subsequent user requests must have this session ID passed as a cookie to resume the session:

Figure 4.3 – Session-based authentication

As shown in the preceding figure, in a session-based authentication strategy, the server does the heavy lifting of keeping a track of the session. A client must provide a valid session ID to resume the session.

To learn how to secure a microservice using session-based authentication, we will experiment on the pet-owner microservice. To begin, we will need to enable security by adding the following dependencies to the pom.xml project:

<!-- Micronaut security -->
   ...