Hi, Spring fans! How're you doin'? I'm fresh off a fantastic holiday spent with family in Los Angeles, California. Later today, the girls and I will drive home to San Francisco, California. I've enjoyed my visits with people here in Los Angeles, especially since it's our first actual visit to Los Angeles before the pandemic.

And now, (can you believe it?), we're staring down the new year. As always, I will do my yearly This Year in Spring roundup, so stay tuned for that below, after our weekly roundup. So, without further ado, here's the last This Week in Spring recap of 2021.

• A Bootiful Podcast: HBase and Cassandra cofounder and Yugabyte CTO Karthik Ranganathan
• Migrating a Spring Boot application to Java 17 – the hard way: Day 2
• Spring Boot 2.5.8 available now
• Spring Boot 2.6.2 available now
• Spring Cloud Square 0.4.0 has been released
• Spring Integration 5.5.7 Available
• Spring Native 0.11.1 available now
• Spring Tips: @Controllers: Wrap Up
• Announcing Testcontainers Cloud: Integration Testing has never been easier
• Blog: Kubernetes-in-Kubernetes and the WEDOS PXE bootable server farm
…

Hi, Spring fans! In this installment, Josh Long (@starbuxman) talks to Yugabyte CTO, Apache HBase and Apache Cassandra co-founder, and distributed database legend Karthik Ranganathan. (Merry Christmas, if you celebrate!)

Hi, Spring fans! In this installment, we conclude our tour of all things @Controller and look at how to distinguish one controller from another with the judicious use of Spring's stereotype annotations.

• WebSockets
• MVC
• REST
• RSocket
• GraphQL

Happy holidays and happy new year!

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…

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>
	</div>
</div>

and some Javascript to populate it:

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

Dynamic Content with React

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…

Hi, Spring fans! In this installment, Josh Long talks to JobRunr.io creator Ronald Dehuysser (@rdehuyss) about JobRunr, which is a distributed job scheduling engine that plugs right into Spring Boot.

Hi, Spring fans! In this installment, we continue our tour of all things @Controller by looking at the nascent Spring GraphQL project

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!

• Read this first! If you've been living under a rock, you may not have heard of the recent Log4J2 vulnerability. If you're using the default, out-of-the-box Spring Boot logging support, then this does not apply to you! But, if you are using Log4j2, specifically, then you need to read this post on Log4j2 and Spring Boot!
• Bruno Borges tweets this very simple workaround for those of you who are using Log4j2 and can't change the startup scripts of your application afflicted by the Log4j2 exploit
• Once you're sure your applications are healthy and happy, check out the new Spring Native 0.11 release! And its new AOT engine, which brings Spring Native to the Next Level…