This Week in Spring - January 17th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! I went to Helsinki, Finland, last week, and this week Im in Atlanta, Georgia, to speak at the Atlanta Java User Group. And, of course, next week, Ill be in New York to join a viewing party for the airing of SpringOne...

This Week in Spring - December 13th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! I truly, absolutely, can not believe that were nearly done with the year already! Have you made your new years resolutions? Submitted your expense reports? Its that time of the year when Im going to start focusing on staying...

A Bootiful Podcast: Microsoft's Asir Selvasingh on Azure Spring Apps, Java at Microsoft, application security, and more

Hi, Spring fans! In this installment, Josh Long @starbuxma talks to his friend, Microsofts Asir Selvasingh @asirselvasingh, about Azure Spring Apps, Java at Microsoft, Spring, application security, and more. Want to learn more? Join us at SpringOne 6-8 December 2022! Want to meet amazing people...

Spring Office Hours Podcast: S5E14 - Spec Driven Development with Simon Martinelli

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by Java Champion, Vaadin Champion, and Oracle ACE Pro Simon Martinelli to talk about Spec-Driven Development. With AI reshaping how we write code, Simon makes the case th...

A Bootiful Podcast: Apache Tomcat legend Mark Thomas (Happy new year!)

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

Spring Tips: Vector Databases with Spring AI

Hi, Spring fans! In this installment, we look at the amazing support for vector databases in Spring AI...

Spring Security 6.3 Adds Passive JDK Serialization/Deserialization for Seamless Upgrades

In the early versions of Spring Security, a deliberate decision was made to avoid providing any guarantee of compatibility for serialized classes via JDK serialization between different versions of the project. This decision primarily took into account the context of RMI, with the recommendation...

The new Spring Boot version validation and upgrade support in Spring Tools

New releases of Spring Boot are being released on a quite frequent schedule and updating your projects to newer versions of Spring Boot is something that many teams and organizations around the globe do as part of their daily work. Sometimes those upgrades are simple and easy, for example for new...

A Bootiful Podcast: Mario Fusco, the Drools rules engine project lead and fellow Java Champion

Hi, Spring fans! In this episode I talk to Drools lead Mario Fusco @mariofusco about the rules engine Drools and its integrations with Spring, Olivetti computers, and so much more...

Spring Tips: the road to Spring Framework 6: the new Ahead-of-Time Compilation Engine and GraalVM

Hi, Spring fans! Spring Boot 3 is here or will be tomorrow, on the 24th of November, 2022, to be more precise!, bringing a fantastic new Ahead-of-Time AOT compilation engine that supports GraalVM native images. Join me, and well dive deep into the engine and its interactions with the Spring...

This Week in Spring - October 4th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Its October 4th, 2022, and Im in Austin, TX, for the new version of show formerly known as the Kafka Summit, here to talk to folks about the amazing opportunities for Spring Boot and Apache Kafka. On the 12th, Ill be in...

Spring Tips: Kubernetes Native Java (Redux, 2022)

Hi, Spring fans! In this installment, Josh Long @starbuxman looks at some of the amazing opportunities for building Spring Boot applications intended for production in Kubernetes in mid 2022. The code, as usual, is available on the spring-tips Github organization...

This Week in Spring - July 7th, 2026

This Week in Spring - July 7th, 2026 Hi, Spring fans! Welcome to another installment of This Week in Spring! We've got a lot to cover and I've got a plane to catch so let's go! What's that over on Spring Initializr? It's JobRunr, that's what! My favorite distributed job execution engine has...

cve-2026-47835 - HIGH - Spring AI vector store metadata filtering to handle special characters in Elasticsearch, OpenSearch, and GemFire Vector Stores

cve-2026-47835 - HIGH - Spring AI vector store metadata filtering to handle special characters in Elasticsearch, OpenSearch, and GemFire Vector Stores...

cve-2026-41699 - HIGH - Unsafe Deserialization in Spring GraphQL

cve-2026-41699 - HIGH - Unsafe Deserialization in Spring GraphQL...

Explainable AI Agents: Capture LLM Tool Call Reasoning with Spring AI

When building AI agents with tool calling capabilities, developers often need insights into why an LLM chose a particular tool—not just which tool it selected. Understanding the model's reasoning process is important for debugging, observability, and building trustworthy AI systems. Spring AI now...

A Bootiful Podcast: Java community legend Victor Rentea

Hi, Spring fans! In this installment we talk to the legendary Victor Rentea. This episode was recorded live at Devoxx UK 2025...

Prompt Engineering Techniques with Spring AI

This blog post demonstrates practical implementations of Prompt Engineering techniques using Spring AI. The examples and patterns in this article are based on the comprehensive Prompt Engineering Guide that covers the theory, principles, and patterns of effective prompt engineering. The blog show...

This Week in Spring - January 21st, 2025

Hi, Spring fans! Welcome to another rip-roaring installment of This Week in Spring! It's time to dive into this week's wondrous roundup! Good news, everybody! Spring Cloud AWS 3.3.0 is available! A neat video on stored procedures in Spring A very interesting article on the flow diagrams for Sprin...

A Bootiful Podcast: Thomas Vitale, author of Cloud Native Spring in Action

Hi, Spring fans! In today's episode I'm thrilled to sit down with my friend and Cloud Native Spring in Action author Thomas Vitale. This episode was recorded live at the amazing Spring IO 2024 event...

A Bootiful Podcast: Timefold Solver AI lead Geoffrey De Smet

Hi, Spring fans! In this installment, I talk to Timefold Solver AI lead Geoffrey De Smet about the amazing new integrations for Spring Boot developers...

This Week in Spring - Spring Boot 3.2 edition - November 21st, 2023

Hi, Spring fans! Welcome to another epic installment of This Week in Spring! As amazing as the week's already been, it's all leading up to this Thursday - Thanksgiving day! - when we release Spring Boot 3.2! and yes, I am very grateful. This release is stuffed to the gills with a ton of new...

A Bootiful Podcast: Spring Data legend Greg Turnquist on optimizations and queries and more

Hi, Spring fans! In this installment, we'll talk to Spring Data legend Greg Turnquist @gregturn about the incredible next-level optimizations and query enhancements, the work in general, and so much more. Recorded live at SpringOne 2023 in Las Vegas!...

A Bootiful Podcast: UL Systems founder and chairman Shigeru Urushibara interviews.. me?

Hi, Spring fans! I just crossed 13 years on the Spring team! I just got to spend a lovely day in the presence of one of my heroes and friends, UL Systems founder and chairman, Shigeru Urushibara-san @ulsystems, here in Tokyo, Japan, and in this episode, we sort of flip the script. We had a brief...

This Week in Spring - April 4th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! How are you doin? Me, I'm exhausted! It's been quite the odyssey trying to get to Devnexus, but I made it, eventually! If you're at Devnexus, check out this roundup of interesting and awesome talks from the Spring team and...

This Week in Spring - March 28th, 202

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm reporting to you from Los Angeles, where my family and I have gone for my daughter's spring break. We're going to survey some prospective colleges and we're going to Disneyland. Needless to say, I'm doubly glad to have al...

This Week in Spring - February 14th, 2023

Hi, Spring fans! It's early Tuesday morning for me. I'm preparing to head to Chicago, Illinois to meet some customers and have myself a grand ol' time in the windy city. I hope you're doing well, I certainly am. A Bootiful Podcast: opensource, Spring Cloud, and Kubernetes maestro Abel Salgado...

A Bootiful Podcast: Java Developer Advocate Billy Korando on Java 27 and Beyond

Hi Spring fans! In this installment, I am thrilled to have the chance to sit down with Java Developer Advocate Billy Korando to talk about the amazing features in the upcoming Java 27! We recorded this a day before I flew to San Francisco to attend the world premiere of the Java documentary, so a...

cve-2026-40998 - HIGH - Jaxp13 XPath XXE via StreamSource and SAXSource

cve-2026-40998 - HIGH - Jaxp13 XPath XXE via StreamSource and SAXSource...

cve-2026-41727 - MEDIUM - In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior

cve-2026-41727 - MEDIUM - In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior...

A Bootiful Podcast: Daniel Garnier-Moiroux on his new book 'Testing Spring Boot Applications'

Hi Spring fans! In this installment I'm thrilled to have had the opportunity to sit down and talk to Daniel Garnier-Moiroux and talk about "Testing Spring Boot Applications," from Manning! testing springboot java kotlin springframework...

Towards Spring Tools 5 - Stereotypes and a new Structural View

When working on Spring projects, developers do not only think in terms of low-level concepts like classes and interfaces. When using Spring, you think about higher-level abstractions and concepts like services, repositories, configuration classes, entities, aggregate roots, and so on. To bring...

A Bootiful Podcast: Spring community legend and friend Simon Martinelli

Hi, Spring fans! Happy Thanksgiving from me, and I am sure the entire Spring team, to you! We are, it should be clear, oh so very grateful.. thankful.. for you, the community. This week it is my great pleasure to chat with Spring community legend Simon Martinelli...

AWS Bedrock Prompt Caching Support in Spring AI

In our previous blog post about Anthropic prompt caching, we explored how prompt caching dramatically reduces API costs and latency by reusing previously processed prompt content. We introduced Spring AI's five strategic caching patterns for Anthropic Claude models and showed how they automatical...

This Week in Spring (AI) - May 27th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! This time, I'm talking to you after an insane week behind me. Last week I flew from San Francisco to Stockholm, Sweden where I was the speaker for the JForum event, a monthly meetup. Spring drew the largest audience to JForum...

Null Safety in Spring applications with JSpecify and NullAway

The initial introduction of the null safety support in Spring dates back to 2017 and the release of Spring Framework 5.0. In 2025, we are evolving that story to bring more added value for Spring developers, either in Java or Kotlin. But before having a deeper look to the changes we are working on...

A Bootiful Podcast: 'Just Use Postgres!' author Denis Magda

Hi, Spring fans! In this installment we talk to Java and distributed database ninja Denis Magda about his new book, "Just Use Postgres!", which looks at how to wield Postgres for a variety of use cases that an application developer should know...

From Spring Cloud Data Flow 2.11.x to 3.0

Dear Spring Community, With the recent announcement of Spring Framework 7.0 and Spring Boot 4.0, the Spring Cloud Data Flow team is pleased to announce the next major release, SCDF 3.0, to align with both Spring Framework 7.0 and Spring Boot 4.0. This will bring the following SCDF ecosystem of...

A Bootiful Podcast: Carl Azoury, Zenika founder and CEO

Hi, Spring fans! In this installment I talk to Zenika founder and CEO Carl Azoury, and friend to the community and a part of the Spring story for decades...

This Week in Spring - November 7th, 2023

Hi, Spring fans! Can you believe we've already turned the calendar page to November? Time sure is a swift developer, deploying months as if they were minor versions in an ever-evolving application. As we adjust our clocks to fall back, waving a reluctant goodbye to daylight savings time, the...

A Bootiful Podcast: Mr. Spring in Action, Craig Walls

Hi, Spring fans! This week, I'm joined by one of my longtime heroes and fellow Disney fans, Craig Walls @habuma. He wrote the most popular book on Spring, Spring in Action, while helping the world stay connected with efforts like Spring Social. This episode was recorded live at SpringOne 2023, in...

A Bootiful Podcast: Java community legend Sharat Chander

Hi, Spring fans! Java 21 is out and in order to celebrate, I talk to Java community legend Sharat Chander...

This Week in Spring - July 11th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in yummy, sunny Jakarta, Indonesia at the moment, preparing for a week of meetings and the SpringOne Tour Indonesia event later this week. I'll also be speaking in Kuala Lumpur, Malaysia on July 20th, 2023 . If you're in...

A Bootiful Podcast: Gradle Developer Advocate, Java Champion, and legend Trisha Gee

Hi, Spring fans! In this installment, Java Champion and legend Trisha Gee @trishagee rejoins the show to talk about Gradle, developer productivity, and so much more...

This Week in Spring - July 12th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! How are you? This week Im writing you from sunny Seattle, Washington, where were having our next installment of the SpringOne Tour series. Its been a ton of fun seeing all these fun and friendly faces again and getting to see...

cve-2026-47863 - MEDIUM - Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush

cve-2026-47863 - MEDIUM - Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush...

This Week in Spring - August 4th, 2026

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's the 4th of August! We're already in month eight of this year! Great Scott! This is an interesting project to help ensure idempotency keys for Spring Boot requests A very interesting post on The New Stack titled, When...

Spring Office Hours Podcast: S5E13 - Community Potluck

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this Potluck episode, Dan and DaShaun open up the floor to the community, answering your questions on Spring Boot, Spring AI, Spring Security, and whatever else is on your mind. Potluck episodes are shaped...

Spring AI Agentic Patterns (Part 1): Agent Skills - Modular, Reusable Capabilities

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 implementatio...

LLM Response Evaluation with Spring AI: Building LLM-as-a-Judge Using Recursive Advisors

The challenge of evaluating Large Language Model LLM outputs is critical for notoriously non-deterministic AI applications, especially as they move into production. Traditional metrics like ROUGE and BLEU fall short when assessing the nuanced, contextual responses that modern LLMs produce. Human...