Book Image

Hands-On Cloud-Native Applications with Java and Quarkus

By : Francesco Marchioni
Book Image

Hands-On Cloud-Native Applications with Java and Quarkus

By: Francesco Marchioni

Overview of this book

Quarkus is a new Kubernetes-native framework that allows Java developers to combine the power of containers, microservices, and cloud-native to build reliable applications. The book is a development guide that will teach you how to build Java-native applications using Quarkus and GraalVM. We start by learning about the basic concepts of a cloud-native application and its advantages over standard enterprise applications. Then we will quickly move on to application development, by installing the tooling required to build our first application on Quarkus. Next, we’ll learn how to create a container-native image of our application and execute it in a Platform-as-a-Service environment such as Minishift. Later, we will build a complete real-world application that will use REST and the Contexts and Dependency injection stack with a web frontend. We will also learn how to add database persistence to our application using PostgreSQL. We will learn how to work with various APIs available to?Quarkus?such as Camel, Eclipse MicroProfile, and Spring DI. Towards the end, we will learn advanced development techniques such as securing applications, application configuration, and working with non-blocking programming models using Vert.x. By the end of this book, you will be proficient with all the components of Quarkus and develop-blazing fast applications leveraging modern technology infrastructure.

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Table of Contents (15 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Section 1: Getting Started with Quarkus
Section 1: Getting Started with Quarkus
2
Introduction to Quarkus Core Concepts
Introduction to Quarkus Core Concepts
Technical requirements
From the big data hype to Kubernetes
From Java EE to MicroProfile
Quarkus – a Kubernetes-native Java framework
Quarkus architecture
Getting started with GraalVM
Installing a development environment
Summary
3
Developing Your First Application with Quarkus
Developing Your First Application with Quarkus
Technical requirements
Getting started with the Quarkus Maven plugin
Kick-starting applications using the Quarkus online application
Testing live reload from your IDE
Turning your application into a native executable
Summary
4
Creating a Container Image of Your Application
Creating a Container Image of Your Application
Technical requirements
Setting up Docker
Running Quarkus applications in a container
Deploying Quarkus applications on a Kubernetes-native platform
Summary
5
Section 2: Building Applications with Quarkus
Section 2: Building Applications with Quarkus
6
Adding Web Interfaces to Quarkus Services
Adding Web Interfaces to Quarkus Services
Technical requirements
Adding web content to Quarkus applications
Adding Enterprise web components
Summary
7
Managing Data Persistence with Quarkus
Managing Data Persistence with Quarkus
Technical requirements
Adding an ORM layer to our applications
Adding a web interface to our application
Making data persistence easier using Panache API
Summary
8
Building Applications Using the MicroProfile API
Building Applications Using the MicroProfile API
Technical requirements
Getting started with the MicroProfile API
The Eclipse MicroProfile Health Check
The Eclipse MicroProfile Fault Tolerance API
The Eclipse MicroProfile Metrics API
Configuring OpenAPI and the Swagger UI
The Eclipse MicroProfile OpenTracing API
The Eclipse MicroProfile REST Client API
Summary
9
Securing Applications
Securing Applications
Technical requirements
Securing our customer service
Securing Quarkus services with Elytron
Securing Quarkus services with Keycloak
Securing Quarkus services with MicroProfile JWT
Using HTTPS with Quarkus
Summary
10
Section 3: Advanced Development Tactics
Section 3: Advanced Development Tactics
11
Advanced Application Development
Advanced Application Development
Technical requirements
Using advanced configuration options
Configuration profiles
Controlling the application life cycle
Firing events with the Quarkus scheduler
Summary
12
Unifying Imperative and Reactive with Vert.x
Unifying Imperative and Reactive with Vert.x
Technical requirements
Demystifying Reactive Programming and Vert.x
Vert.x API models in Quarkus
Managing the Reactive SQL Client
Summary
13
Reactive Messaging with Quarkus
Reactive Messaging with Quarkus
Technical requirements
Getting started with Reactive Messaging
Streaming messages with Apache Kafka
Streaming messages with AMQP
Summary
14
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Getting started with the Quarkus Maven plugin

In order to scaffold our first Quarkus application, we will be using Maven, which is the most common software and release management tool available. It is used by a variety of developers, mostly because it offers the following:

  • A standard structure for all your projects
  • Centralized and automatic management of dependencies

Maven is distributed in several formats for the user's convenience. You can download it from https://maven.apache.org/download.cgi.

Once you've downloaded Maven, do the following:

  1. Unzip the distribution archive (for example, apache-maven-3.6.1-bin.zip) to the directory that you want Maven to be installed in (for example, in your $HOME/apache folder):
$ mkdir $HOME/apache
$ unzip $HOME/Downloads/apache-maven-3.6.1-bin.zip -d $HOME/apache
  1. Add the Maven libraries to your system path, as shown in the following...
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