This Week in Spring - December 21st, 2021

Engineering | Josh Long | December 21, 2021 | ...

Hi, Spring fans! What a crazy wonderful week it's been and what a wonderful week it'll be! It's the holidays. I've set my out-of-office status and am already winding down for the year. You can expect new episodes of This Week in Spring and a Bootiful Podcast (@BootifulPodcast), of course, but I won't be doing any new Spring Tips (@SpringTipsLive) videos until next year. That said, I can't wait for you to see what I'm cooking up for the new installmetn of Spring Tips! It's going to be a ton of fun!

Now then, we've got a crazy amount of stuff to get to this week. Let's dive right into it. It'll be Christmas before we talk again, so Merry Christmas, if you celebrate that. Otherwise, I just hope you're having a wonderful week. I look forward to next week's installment where of course we'll do our yearly This Year in Spring

Client Side Development with Spring Boot Applications

Engineering | Dave Syer | December 17, 2021 | ...

This article explores the different options that Spring Boot developers have for using Javascript and CSS on the client (browser) side of their application. Part of the plan is to explore some Javascript libraries that play well in the traditional server-side-rendered world of Spring web applications. Those libraries tend to have a light touch for the application developer, in the sense that they allow you to completely avoid Javascript, but still have nice a progressive "modern" UI. We also look at some more "pure" Javascript tools and frameworks. It’s kind of a spectrum, so as a TL;DR here…

Client Side Development with Spring Boot Applications - Part 2

Engineering | Dave Syer | December 17, 2021 | ...

Part 1

Plain Javascript with SSE Stream

Vue isn’t really adding a lot of value in this simple HTML replacement use case, and it would add no value at all to the SSE example, so we will go ahead and implement that in vanilla Javascript. Here’s a stream tab:

<div class="tab-pane fade" id="stream" role="tabpanel">
	<div class="container">
		<div id="load"></div>

and some Javascript to populate it:

<script type="module">
	var events = new EventSource("/stream");
	events.onmessage = e => {
		document.getElementById("load").innerHTML =;

Dynamic Content with React

This Week in Spring - December 14th, 2021

Engineering | Josh Long | December 14, 2021 | ...

Hi, Spring fans! How are you? Welcome to another installment of This Week in Spring! I'm doing alright! It's noon as I write this, and I've got GSUG joint presentation with Matt Raible later today. Then, tonight at midnight my time to 5 am or 6 am, I'm kicking off a two-day workshop for GOTO! I look forward to seeing ya there! Anyway, we've got a lot to cover so let's dive into it!

Log4J2 Vulnerability and Spring Boot

Engineering | Phil Webb | December 10, 2021 | ...

Updates: Since this blog post has been published, a new logback 1.2.9 version has been published. While this fixes a security issue, prerequisites for exploits are very different as they "requires write access to logback's configuration file". Log4J also released a new 2.17.0 version with fixes for CVE-2021-45046 and CVE-2021-45105. Spring Boot 2.5.8 and 2.6.2 haven been released and provide dependency management for logback 1.2.9 and Log4J 2.17.0. Log4J 2.17.1 contains a fix for CVE-2021-44832

As you may have seen in the news, a new zero-day exploit has been reported against the popular Log4J2 library which can allow an attacker to remotely execute code. The vulnerability has been reported with CVE-2021-44228 against the log4j-core jar and has been fixed in Log4J v2.15.0

New AOT Engine Brings Spring Native to the Next Level

Engineering | Sébastien Deleuze | December 09, 2021 | ...

On behalf of the team and everyone who has contributed, it is my pleasure to announce the release of Spring Native 0.11, which provides native support for Spring Boot 2.6. This ambitious release is the result of five months of hard work by the Spring team, who have been working on a brand new architecture to bring Spring support for creating native executables with GraalVM to the next level. You can already try it on!

Learn more about Spring Native 0.11 and see it in action in this new Spring Tips video from Spring Developer Advocate Josh Long.

New Ahead-Of-Time Engine


Get the Spring newsletter

Thank you!

Get ahead

VMware offers training and certification to turbo-charge your progress.

Learn more

Get support

Spring Runtime offers support and binaries for OpenJDK™, Spring, and Apache Tomcat® in one simple subscription.

Learn more

Upcoming events

Check out all the upcoming events in the Spring community.

View all