Spring Data Ahead of Time Repositories

In the past couple of years we have seen heavy investment throughout the Java ecosystem to reduce application startup times. The main focus gravitates around Ahead-of-Time optimizations. May it be condensing code into a GraalVM native executable, capturing already optimized bytecode with...

A Bootiful Podcast: This Week in Spring (AI) - May 20th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! As I write this, I'm in sunny Stockholm, Sweden for the JForum 123 installment. This is, apparently, the first time the meetup is completely full up since before the pandemic, with more than 150 people in attendance! Tak,...

Your First Spring AI 1.0 Application

Your First Spring AI 1.0 Application by Dr. Mark Pollack, Christian Tsolov, and Josh Long Hi, Spring fans! Spring AI is live on the Spring Initializr and everywhere fine bytes might be had. Ask your doctor if AI is right for you! It's an amazing time to be a Java and Spring developer. There's nev...

MCP Authorization in practice with Spring AI and OAuth2

Last month, we explored how to secure Spring AI MCP Servers1 with the OAuth2 authorization framework. In the conclusion of that article, we mentioned we'd explore using standalone Authorization Servers for MCP Security and deviate from the then-current specification. Since we published the articl...

Spring Security authorization bypass for method security annotations on private methods

Spring Security Aspects may not correctly locate method security annotations on private methods. This can cause an authorization bypass. Your application may be affected by this if the following are true: In that case, the target method may be able to be invoked without proper authorization. You...

A Bootiful Podcast: Donald Raab on Eclipse Collections

Hi, Spring fans! In this edition, we talk to Eclipse Collections founder Donald Raab...

Spring Framework DataBinder Case Sensitive Match Exception (2nd update)

CVE-2024-38820 ensured Locale-independent, lowercase conversion for both the configured disallowedFields patterns and for request parameter names. However, there are still cases where it is possible to bypass the disallowedFields checks...

Spring gRPC Promoted!

It's a few months since we had a blog about Spring gRPC that wasn't just a release announcement. This one marks the first release since the project was promoted from experimental to a full member of the Spring Portfolio. This doesn't change the way you consume the project, but it has some...

This Week in Spring - May 13th, 2025

Hi, Spring fans! As I write this, I'm at the amazing Code Remix event in Miami well, technically Tampa, Florida. I'll also be speaking at the Tampa JUG while I'm there, so look out! After that, I'll be headed back to Europe—a wee bit further north this time—to Stockholm for the amazing JForum...

A Bootiful Podcast: V Körbes on security from the platform on up

Hi, Spring fans! In today's extra special installment I talk to Broadcom's V Körbes who works on security above and below the application...

This Week in Spring - May 6th, 2025

Hi, Spring fans! As I write this, I'm winging my way to lovely London, UK, for the amazing Devoxx UK event! I'll be looking at the wide and wonderful world of Springdom. Then, from there, it's off to Code Remix in Miami. I'll also be speaking at the Tampa JUG while I'm there, so look out! After...

Dynamic Tool Updates in Spring AI's Model Context Protocol

The Model Context Protocol MCP is a powerful feature in Spring AI that enables AI models to access external tools and resources through a standardized interface. One interesting capabilities of MCP is its ability to dynamically update available tools at runtime. This blog post explores how Spring...

A Bootiful Podcast: Spring instructor Mary Ellen Bowman

Hi, Spring fans! In this installment I talk to Mary Ellen Bowman, a legendary Spring instructor!...

A Bootiful Podcast: Java Champion, Tessl Devrel head, friend, Virtual JUG co-founder Simon Maple

Hi, Spring fans! In this episode, we catch up with Java Champion, Tessl Devrel head, Virtual JUG co-founder, and friend Simon Maple! This episode was recorded at the amazing ArcOfAI conference held in amazing Austin, TX!...

Spring Boot EndpointRequest.to() creates wrong matcher if actuator endpoint is not exposed

EndpointRequest.to creates a matcher for null/ if the actuator endpoint, for which the EndpointRequest has been created, is disabled or not exposed. Your application may be affected by this if all the following conditions are met: You are not affected if any of the following is true:...

This Week in Spring - April 22nd, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring , which I'm writing from magnificent Minneapolis, Minnesota, where I'm recording an amazing Frontend Masters course introducing Spring Boot. I love this article introducing Spring AI in JavaPro magazine Want to run an LLM...

Spring Security BCryptPasswordEncoder maximum password length breaks timing attack mitigation

The fix applied in CVE-2025-22228 inadvertently broke the timing attack mitigation implemented in DaoAuthenticationProvider...

A Bootiful Podcast: 'Mr. Apache' Jeff Genender

Hi, Spring fans! In this episode I'm joined by well-known member of the Java community Jeff Genender, whose contributions to Apache over the decades have driven several key projects with which you're no doubt familiar...

This Week in Spring - April 15th, 2025

Spring AI M7 is here! This new release includes a bunch of awesome new features! And some refactorings. Notably that the Spring AI auto-configuration has changed from a single monolithic artifact to individual auto-configuration artifacts per model, vector store, and other components. This change...

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...

A Bootiful Podcast: Wiremock's leaders Lee Turner and Tom Akehurst

Hi, Spring fans! In this installment we talk to Wiremock's leaders Lee Turner and Tom Akehurst...

This Week in Spring - April 8th, 2025

Hi, Spring fans! How are ya? I'm doing fine. Excited, even. You see, Spring AI M7 is coming soon! In theory, it drops on Thursday. Don't hold us to that — these things can change :- But soon , and it's turning out to be a whopper of a release! You should try upgrading your application to the new ...

Spring Cloud Config Server May Not Use Vault Token Sent By Clients

Spring Cloud Config Server may not use Vault token sent by clients using a X-CONFIG-TOKEN header when making requests to Vault. Your application may be affected by this if the following are true: In this case the SessionManager persists the first token it retrieves and will continue to use that...

Using Spring AI 1.0.0-SNAPSHOT: Part 2 - Important Changes and Updates

Using Spring AI 1.0.0-SNAPSHOT: Part 2 - Important Changes and Updates This blog post is a continuation of our previous article Using Spring AI 1.0.0-SNAPSHOT: Important Changes and Updates, where we introduced the significant changes to artifact IDs, dependency management, and autoconfiguration ...

A Bootiful Podcast: AWS Developer Advocate and industry legend James Ward

Hi, Spring fans! In this installment I talk to AWS Developer Advocate and industry legend James Ward about AWS Bedrock, Amazon Cohere, Spring AI, MCP, and so much more!...

Securing Spring AI MCP servers with OAuth2

Spring AI offers support for Model Context Protocol, or MCP for short, which allows AI models to interact with and access external tools and resources in a structured way. With Spring AI, developers can create their own MCP Servers and expose capabilities to AI models in just a few lines of code...

This Week in Sprng - April 1st, 2025

Hi, Spring fans! Welcome to another exciting installment of This Week in Spring! It's April Fools day, so be wary of things you read on the internet, but it's also the 11th anniversary of Spring Boot 1.0, which was released this day in 2014! that's not an April Fools. Happy birthday! I'm in...

A Bootiful Podcast: My friend Anthony Dahanne on Buildpacks, Production, Docker images, and more

Salut fans de Spring! In this installment I'm joined by the legendary Anthony Dahanne. If you've enjoyed success in production using Spring's built-in spring-boot:build-image capability, you've got today's guest Anthony to thank for it!...

This Week in Spring - March 25th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! This week, I’m in Portland, OR, then I'm off to Austin, TX for the Arc of AI show, and then I'm off to Amsterdam for Voxxed Days Amsterdam! If you're around, be sure to say hi! There's a ton of cool stuff to look at, so witho...

Using Spring AI 1.0.0-SNAPSHOT: Important Changes and Updates

Using Spring AI 1.0.0-SNAPSHOT: Important Changes and Updates Spring AI 1.0.0-SNAPSHOT introduces several important changes to artifact IDs, dependency management, and autoconfiguration. This blog post outlines these changes and provides guidance on how to update your projects. The most significa...

A Bootiful Podcast: Java Champion and legend Henri Tremblay

Hi, Spring fans! In this installment I talk to Henri Tremblay, head of TS Imagine Canada, Java Champion, Montreal JUG leader, EasyMock lead dev and all around legend!...

Spring Security BCryptPasswordEncoder does not enforce maximum password length

BCryptPasswordEncoder.matchesCharSequence,String will incorrectly return true for passwords larger than 72 characters as long as the first 72 characters are the same...

Spring Security authorization bypass for method security annotations on parameterized types

Spring Security may not correctly locate method security annotations on parameterized types or methods. This may cause an authorization bypass. Your application may be affected by this if the following are true: In that case, the target method may be able to be invoked without proper authorizatio...

This Week in Spring – March 18th, 2025

Hi, Spring fans! I just got back from the amazing JavaOne show held in Redwood Shores. It was a fun, uproarious event and a great chance to reconnect with tons of friends, old and new. I love this community! One of the central highlights of this show? Java 24 is here, finally! And, as usual, we'v...

A Bootiful Podcast: Jonatan Ivanov, observability legend on the Micrometer team

Hi, Spring fans! In this installment we talk to one of the Willy Wonka's of observability, the amazing Jonatan Ivanov! This episode was recorded at ConFoo 2025...

This Week in Sprng - March 11th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's a busy week as always, fresh off the rush that was Devnexus and busily preparing for the fun that is JavaOne! It's going to be epic! want to learn about dependency injection, auto-configuration, Spring Framework, Spring...

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: Johannes Bechberger, Java engineer at SAP

Hi, Spring fans! In this installment I talk to Johannes Bechberger, Java engineer working on profilers and their underlying technology in the SapMachine team at SAP. His work today comprises many open-source contributions and his blog, where he regularly writes on in-depth profiling and debugging...

Spring gRPC 0.4.0 for great good!

NB : you can find the working code for this blog here There's a new release of the amazing—if experimental—Spring gRPC project: version 0.4.0. I won't get into the nitty-gritty of all that's new, but I just wanted to highlight how elated I am to use it and walk you through the step-by-step path t...

This Week in Sprng - March 4th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring , and Happy Devnexus 2025 to those who celebrate! That's right sports fans, I'm off to awesome Atlanta, Georgia later today for Devnexus, one of the world's largest annual gatherings of Java community and luminaries alike. I'l...

This Week in Spring - February 25th, 2025

Hi, Spring fans, and welcome to another rip-roarin' installment of This Week in Spring! Later today I'll board a plane for magnificent Montreal, Canada for the amazing Confoo conference! I'm super excited! Good news everybody! Spring Boot 3.5.0-M2 is now available! In last week's installment of t...

A Bootiful Podcast: BellSoft's Catherine Edelveis

Hi, Spring and JDK fans! In this week's episode I talk to BellSoft developer advocate Catherine Edelveis java springboot jre jdk graalvm CRaC...

This Week in Spring - February 18th, 2025

Hi, Spring fans! It's the week of February 18th, 2025, and you know what that means? ConFoo and Devnexus are nearly here! Next week, I'll be traveling to amazing Montreal, Canada, to speak at the ConFoo show for an amazing community, poutine, and technology! Then, a few days later, it's off to...

A Bootiful Podcast: Spring Legend Glenn Renfro on Devnexus 2025, Cold brews, and More

Hi, Spring fans! In today's installment, I talk to Spring legend Glenn Renfro...

A Bootiful Podcast: Spring Boot and Spring Initializr legend Moritz Halbritter

Hi, Spring fans! In this installment I talk to Spring Boot and Spring Initializr legend Moritz Halbritter...

This Week in Spring - February 11th, 2025

Hi, Spring fans! It's almost Valentine's day, and let me just say: I love the Spring community! It's such an exciting and interesting place to be. Thank you everyone for all that you do. I'm busy preparing for ConFoo, in Montreal, Canada, and for Devnexus, in Atlanta, Georgia. If you're around be...

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...

This Week in Spring - February 11th, 2025

Hi, Spring fans! It's almost Valentine's day, and let me just say: I love the Spring community! It's such an exciting and interesting place to be. Thank you everyone for all that you do. I'm busy preparing for ConFoo, in Montreal, Canada, and for Devnexus, in Atlanta, Georgia. If you're around be...

This Week in Spring - February 4th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's February 4th, 2025, as I write this. We are ten days away from Valentine's day, and about a month away from Devnexus. Lots to look forward to, in both the short term and the long term! Let's dive right into this week's...

A Bootiful Podcast: HTMX creator Carson Gross

Hi, Spring and HTML fans! Today I talk to hypermedia enjoyer Carson Gross, creator of the ever popular HTMX library which eschews a ton of the complexity associated with building client side applications...