This tutorial explains the differences between Quarkus RESTEasy Classic and RESTEasy Reactive. You’ll learn how to choose between them and which one fits best for your new applications.
Quarkus RESTEasy Class implementation has improved a lot since its first release. Within this tutorial we will show some new features which are available in Quarkus 3 starting from the new Reactive REST paradigm.
Documentation is a critical part of building APIs, as it helps developers and users understand and interact with your endpoints effectively. Swagger UI is a powerful tool that simplifies this process. In this article, we’ll explore how you can integrate and customize Swagger UI in a Quarkus application with minimal effort.
This article will teach you how to use a plain Datasource resource in a Quarkus application. We will create a simple REST Endpoint and inject a Datasource in it to extract the java.sql.Connection object. We will also learn how to configure the Datasource pool size.
Here’s a step-by-step tutorial on how to configure Cross-Origin Resource Sharing (CORS) in Quarkus applications with just a few configuration tweaks.
This tutorial will teach you how to run WildFly applications on Openshift using WildFly S2I images. At first, we will learn how to build and deploy applications using Helm Charts. Then, we will learn how to use the S2I legacy approach which relies on ImageStreams and Templates.
Whether you’re a beginner exploring OpenShift for the first time or an experienced user looking for quick references, this cheat sheet is designed to provide you with a CheatSheet of OpenShift commands, concepts, and best practices. From managing pods and services to setting up routes and exploring advanced deployment strategies, we’ve got you covered.
In this article, we will learn how to debug a Quarkus application using two popular Development Environments such as IntelliJ Idea and VS Studio. We’ll explore how these IDEs can empower you to effectively identify, understand, and resolve issues within your Quarkus projects.
Docker-compose allows you to access container ports in two different ways: using “ports” and “expose:”. In this tutorial we will learn what is the difference between “ports” and “expose:” providing clear examples.
In this article we will learn how to create and run a sample Quarkus 3 application which uses Hibernate ORM and JPA. We will create a sample REST Endpoint to expose the basic CRUD operations against a relational Database such as PostgreSQL.
The error message “0/1 nodes are available: 1 Insufficient memory. preemption: 0/1 nodes are available: 1 No preemption victims found for incoming pod.” indicates your pod can’t be scheduled due to memory constraints. Here are the steps to address this issue-
This article discusses how to automate Tasks in Kubernetes and OpenShift using Jobs and Cron Jobs. We will show some example on how to create and manage them. Then, we will discuss the best practices about using Jobs in Kubernetes.
Kafka Streams is a powerful and lightweight library provided by Apache Kafka for building real-time streaming applications and microservices. In this tutorial we will show a simple Kafka Streams example with Quarkus which shows how to perform stream processing tasks directly within the Kafka ecosystem, leveraging the familiar Kafka infrastructure to process and transform data in real-time.
Helm is a package Manager that simplify the management of manifest resources you need for Kubernetes projects. In this article we will walk through an example WildFly application which we will deploy on OpenShift using Helm Charts
Quarkus is a framework you can use to develop Cloud-ready modern Java applications. Quarkus also allows to generate native executables from your Java application and can easily leverage the distribution as Container Images.
In this first tutorial about Virtual Threads Mastering Virtual Threads: A Comprehensive Tutorial , we have covered the basics of Virtual Threads. In this article we will learn how Quarkus simplifies the implementation and debugging of Virtual Threads in your application through the @RunOnVirtualThread annotation.
This article discusses how to upgrade your existing Quarkus 2.x applications to Quarkus 3.x using the Quarkus CLI tool. We will learn at first which is the impact of the upgrade on Quarkus 2 application. Then, we will show how to perform the upgrade with just a single command line!
The CVE-2023-4853 vulnerability in question impacts Quarkus framework’s HTTP Security Policy, . This policy provides access control to various endpoints within an application enabling developers to secure access based on path-based configurations. However, a critical flaw has been identified in how the HTTP Security Policy handles request paths containing multiple adjacent forward-slash characters.
In this tutorial we will learn how to create a REST CRUD application in Quarkus, starting from a Hibernate Panache Entity. We will show two different approaches: in the first one we will create a REST Resources to map the CRUD methods. Then, we will show how to use REST Data Panache to generate automatically a REST Endpoint for an Entity.
In this tutorial we will learn how to use Templates on OpenShift, taking as example a simple application which uses the CakePHP framework. This framework consists of a MySQL and PHP set of Images that will deploy a basic Web application.
Vaadin Flow provides a comprehensive set of UI components and tools for creating rich and interactive user interfaces, while Quarkus offers a lightweight and efficient Java framework for developing cloud-native applications. In this article, we will explore how to combine the strengths of Vaadin and Quarkus to build web applications with ease.
In this step-by-step guide we will learn how to code, run and test SOAP web services using the Quarkus CXF Extensions. We will first learn how to deploy a simple SOAP Web services and then we will consume it with different Clients such as SOAP UI, Java Client or a Camel CXF Consumer.
This article introduces some of the new features of the upcoming Quarkus 3 release which is, at the time of writing, in Alpha state. We will cover the main highlights and some tools you can use to upgrade existing Quarkus applications.
When running a Java application in a Docker container, it is important to properly configure the JVM memory settings. This is essential to ensure that the application has enough memory to run correctly.
ReactJS is a popular and widely used Javascript library for building rich user interfaces. this article shows how to consume Rest Services from a Quarkus application in a simple React front-end.
Camel is the open source swiss knife framework for integration, with over 300 components allowing the integration between external systems. In this article we will learn how to use Camel extensions for Quarkus to build powerful Java Integrations.
This article launches you on a tour of Transaction Management in Quarkus applications by focusing on the standard declarative approach and the new programmatic transaction API.
Quarkus is one of the most innovative Java projects, therefore it’s not a surprise there are frequent updates to it. In this article we will have a look at the available guidelines to migrate Quarkus applications and tools that can help you to simplify your update strategy.
In this article, we will learn how to create a Quarkus Reactive application which uses the SmallRye Reactive Messaging and Mutiny project to stream data from and to a Kafka cluster.
Quarkus uses the JBoss Log Manager project as facade for application logging. Therefore, the main configuration options should be familiar to JBoss/WildFly users. Let’s see how to configure most common options.
In modern microservices architectures, services have dynamically assigned locations. Therefore, it’s essential to integrate Service Discovery as part of the picture. In this article you will learn how to leverage Service Discovery using Smallrye Stork framework on top of a Quarkus reactive application.
In this article we will walk through a sample migration of a Spring Boot REST Application to Quarkus using Red Hat Migration Toolkit for Applications (MTA).
This article is a walk through Quarkus REST Client API using MicroProfile REST Client. We will develop a basic REST Endpoint and then we will set up a simple Client project with a Service interface for our REST Service.
In this article we will learn how to deploy a Quarkus application on top of a Kubernetes cluster. We will start with a minimal REST application and then we will increase its complexity.
Here is a list of Quarkus Interview questions that might help you to nail a Quarkus Job or simply to test your knowledge of Supersonic Java applications!
Quarkus now includes (since version 2.3.0) a Development UI (DevUI) which allows us to monitor runtime information about your extensions.
This tutorial will introduce you to Hibernate Reactive which enables support for non-blocking database drivers and a reactive programming with Hibernate ORM.
Quarkus is set of technologies to develop an entire Microservice architecture. The foundation of this architecture is typically an HTTP server, serving REST Endpoints. It is however also possible to create powerful Java scripts using Quarkus advanced sets of APIs. In this tutorial we will learn how to create standalone Quarkus applications with a bare simple main entry point.