Building a @graalvm image and running it on the new Azure Container Apps azure.microsoft.com/en-us/services… is a total revolution for Java developers.
Let's discuss this in more details, here's the extraordinary, the bad and the ugly ⬇️ (1/10) Here I'm studying running a @springboot application (available at github.com/microsoft/Nube… ), but this works the same with @QuarkusIO and @micronautfw - I'm just more familiar with Spring, and you'll have a similar result with other major Java frameworks (2/10)

If you like native images with @graalvm + cool command line tools with @picocli + deploying easily to @Azure then it's Christmas time🎄!
Have a look at the new NubesGen CLI github.com/jdubois/nubesg… that can configure and deploy your application with one command! (1/4) Using the GitHub Action at github.com/jdubois/nubesg… this generates a JAR file as well as 3 binaries built with @graalvm (for Linux, MacOS and Windows), so you can run this command line tool on your favorite OS (2/4)

Very exciting news from the @jhipster team: here comes JHipster Lite!
This is a new project, written from scratch, let me give you the details and my impressions in this thread ⬇️ (1/7) Before we start, please note that I tweet with my own Twitter account (and not @jhipster !), to show those are my personal opinions, and then we'll see in the future how the whole team wants to move forward (2/7)

With working from home being the new normal, take care of your health!
During lunch break, I just did a nice 10 km in the Bois de Boulogne (US people: this is 3x bigger than Central Park), who comes with me next time? Here are some photos ⬇️ Cool start along the Seine

I recently switched my trusty MacBook Pro 2010 to Linux, it’s fun and of great value if you have a limited budget!
Here’s what I learned (1/6) ⬇️ This is a MacBook Pro 13’, with 128 Gb SSD and 4 Gb RAM, that I bought for 1,500 € in 2010.
It has been used extensively for more than 10 years.
Sounds obsolete?
No, at that time those machines were easy to upgrade (unlike today!) (2/6)

I got Spring Native (with GraalVM) running on Azure App Service.
Is it good? Yes!
But is it a game-changer? Let's discuss in this thread 🧵⬇️ First, the dev experience is awesome:
- Generate the app with start.spring.io
- Build the Docker image exactly like a normal JVM Spring app, running "mvn spring-boot:build-image"
- Push it, and boom! As easy as that!

As Spring Native beta was released last Friday by @sdeleuze , I updated my Azure Functions + reactive Spring + native sample application, here's a thread with what I learnt 🧵⬇️ The code is at github.com/jdubois/azure-… and it's now exactly the same application as the official (non-native) sample I maintain at github.com/Azure-Samples/…

Today is the day I do "serverless Java" tests, calculations, and rants!
So yes, that's another thread, this time on serverless & cold start costs, and we'll do some extreme calculations ⬇️ Earlier today I did some tests where I have cold starts of about 6 seconds, and many people told me it was way too slow.
You would only get this very rarely (it's only on the first request), and that's with a free plan (people paying won't have this), and that's only for HTTP.

My latest thread about "Serverless Java" is getting some interesting feedback, who wants to try @graalvm in the cloud with me?
And yes, that's another thread ⬇️ If you want all the details, my sample project is at github.com/jdubois/azure-…

This builds a 16Mb native image (Java + Spring + the application) that starts up *very fast*, but it's better to test this than believe me, right?

Yesterday I did a fun “Serverless Java” session with more than 100 developers working for one of our big customers, and I realize there are 2 big misconceptions on this (thread)⬇️ As much as I like telling things like “serverless is just CGI-BIN in the cloud” or “with serverless you pay for requests, not instances”, those catchy phrases you see on Twitter are mostly wrong

I wrote earlier that I would leave alone the French #StopCovid application, but this morning I had more (bad) news, a thread ⬇️
(TL;DR they store you IPs, don't use this app) On my *very first thread* on the subject, I wrote that centralizing everything in one place was a bad idea, and that they very likely stored the IPs somewhere in the logs, or at least that it was easy to do. So much for "anonymized" data.

https://twitter.com/juliendubois/status/1266022088055414785

The French #StopCovid application is out! Thanks to @mhausherr I had the URL to their backend server, so let's have a look at how they are hosting this ⬇️ The French press is currently reporting that the maintenance and hosting of this application will be billed "between 200,000 and 300,000 Euros" per month, see nouvelobs.com/economie/20200… so we can expect some really great stuff here

I've had many replies from my #StopCovid tweet from yesterday.

https://twitter.com/juliendubois/status/1266022088055414785

Let's have a look at the latest announcements from @platombe as he details *officially* my main issue. The talk is available at

https://twitter.com/LCP/status/1265655571518238725

and unfortunately begins with some sophism like "if it's not efficient it can't be dangerous", but let's move to the important part.

I've had a look at France's #StopCovid application sources. The server is coded with Java/Spring Boot so I was happy to find my favorite tech stack here! Then I became quickly disappointed ⬇️ Our minister @cedric_o said that the data was stored in France's "most secured file of the Republic". I have designed and worked on many applications for the French state (healthcare, central bank, etc) so I was expecting something... different