Hi, Spring fans! This week we catch up with the observably awesome Jonatan Ivanov on how to measure all the things with Micrometer

Hi, Spring fans, and welcome to another installment of This Week in Spring! It's the 13th of January, 2026, and it's been quite the week indeed! Let's dive right into it!

• Nobody, and I mean nobody, asked. So I put together a video on how to use Spring WS to build SOAP-based services in 2026. Hey, SOAP may be legacy but the legacy endures in a lot of places and there's no reason you can't modernize those systems and services to use Spring Boot 4, GraalVM, and OAuth, as I show in this video.
• In last week's installment of A Bootiful Podcast, I talked to Spring Security lead Rob Winch on Spring Security 7
• Spring gRPC 1.0.1 is available now
• I love this blog from Embabel creator Rod Johnson: RAG pipelines are the past, agentic is the future
• I know this doesn't have anything to do with Spring, per se, but I find it …

subtitle: "LLM-Agnostic Skills That Run in Your Environment"

Agent Skills are modular folders of instructions, scripts, and resources that AI agents can discover and load on demand. Instead of hardcoding knowledge into prompts or creating specialized tools for every task, skills provide a flexible way to extend agent capabilities.

Spring AI's implementation brings Agent Skills to the Java ecosystem, ensuring LLM portability—define your skills once and use them with OpenAI, Anthropic, Google Gemini, or any other supported model.

This is the first post in our Spring AI Agentic Patterns series. This series explores the spring-ai-agent-utils toolkit—an extensive set of agentic patterns for Spring AI, inspired by Claude Code. We'll cover Agent Skills (this post…

Hi, Spring fans! In this installment, I have the privilege of sitting down and talking to the legendary Rob Winch, lead of Spring Security, Spring Session, and the amazing Testjars project.

Hi, Spring fans, to the first installment of This Week in Spring in the new year and, roughly, the fifteenth anniversary edition of this series! I've been writing these blogs since the first week of January of 2011, and I am proud to say that I haven't (so far) missed a single week! I've always published it on Tuesday (with some fuzziness around whose Tuesday, as I tend to bounce around the globe a fair bit). I want to thank, as I always do, Spring cofounder Keith Donald for this wonderful and simple idea. He dropped it in my lap and said to give it a shot, and I've never looked back. He's no…

In this episode, I talk with Mark Thomas, the legendary and highly prolific committer to Apache Tomcat. Happy New Year!

Hi, Spring fans! Can you believe it? It's already the 30th of December! I celebrated Christmas with my family in Los Angeles, then we jumped on a flight headed for Southeast Asia to ring in the New Year with more friends and family. I'm sitting at a café in the sweltering city of Kuala Lumpur, Malaysia as I write this - looking back fondly at the last week of, and the entire year of, 2025.

That's right! It's time for my yearly tradition of retroactive year-end navel‑gazing and analysis; it's time for This Year in Spring, where we review the good, the great, and the amazing: the top five best…

Back in September 2016, nearly a decade ago now, we introduced Spring Vault as a integration layer for HashiCorp Vault within Spring applications, complemented by Spring Cloud Vault for Spring Boot arrangements. The core idea has always been straightforward: Externalizing secrets to encrypted Vault storage to reduce application-side complexity considerably, especially by leveraging Vault's secure primitives for communication and authentication.

VaultTemplate and its reactive counterpart ReactiveVaultTemplate have served us well, providing a familiar Java-based programming interface for…

Hi Spring fans, and happy holidays! I'm delighted to be joined again on this episode by my friend and fellow harbinger of doom (in the best possible way), Nate Schutta — co-author of the wonderful book Foundations of Software Engineering!