A central focus of Quarkus is developer joy and productivity. As part of this focus, Quarkus provides a powerful development mode which, among other things, allows true hot compilation of code. In this talk we will take a look at this feature in detail. Aside from allowing hot reloading locally, we can also configure our application to allow hot reloading remotely. For example, the application could be running in a docker container or on a kubernetes-/openshift-cluster. This improves Dev/Prod-parity and thus enhances the development lifecycle.

1. IBM & Consol present: The day after tomorrow
Remote Development of Quarkus
Applications
Dr. Marco Bungart
Senior Software Engineer
2021-09-16

2. $> whoami

3. Slide 3
Dr. Marco Bungart
consol.com

2008 – 2013: Studied Bioinformatics/Computer Science
in Jena

2013 – 2018: Ph.D. student in Kassel

Since 2018: Software Engineer at ConSol

Twitter, github, bitbucket, stackoverflow, … : turing85

Interests: Keycloak, GraalVM, Quarkus

4. Quarkus!

5. Slide 5
What is Quarkus?
consol.com

“A Kubernetes Native Java stack tailored for OpenJDK HotSpot and
GraalVM, crafted from the best of breed Java libraries and
standards.” - quarkus.io

Lightweight in execution (small memory footprint)

Compilation to native binary possible through GraalVM

Even lower memory footprint

Single instance may have worse performance, but more
deployments possible due to lower resource consumption
→ net gain

Up & running within minutes
Source:
https://1000logos.net/sonic-logo/

6. Slide 6
Why Quarkus?
consol.com

Developer-joy front & center

Developed by developers, for developers

Excellent Maven- and gradle-integration

Powerful dev-mode, tight feedback loop

Curated list of dependencies, “best of the breed”

Red Hat- and Community-developed

Apps (re)start within milliseconds

7. Cloud-native

8. Slide 8
Developing cycle
consol.com

Early Stages:

Bootstrapping Project

Dependencies in Flux

Setting up configuration

Main development:

Dependencies (mostly)
stable

Development of core
business logic

Feature development:

Core business logic done

Debugging/
Troubleshooting

9. Agenda

10. Slide 10
What will we talk about today?
consol.com

Use a simple project

Code is boring, we want to see devmode in action!

Start by developing locally

Move to developing in docker-compose environment

Finish by developing in an openshift, running in the cloud

We use the IBM cloud, feel free to try it yourself!
https://ibm.biz/BdfGeM

11. Slide 11
Code Examples
consol.com

Can be found at https://github.com/ConSol/quarkus-devmode

Slides are included

Commits + messages are meant as a step-by-step guide for what
we are going to do

12. Slide 12
Live Demo
consol.com
Source: https://makeameme.org/meme/lets-pray-to-9000c9f697

13. Questions?

14. Thank you!

15. ConSol
Consulting & Solutions Software
GmbH
Office Düsseldorf
Kanzlerstraße 8
D-40472 Düsseldorf
Germany
Tel.: +49-89-45841-100
Marco.Bungart@consol.de
www.consol.com
Twitter: @turing85