Hi, Spring fans! Welcome to another installment of This Week in Spring! It's a wonderful tuesday here in my home town of San Francisco as I write this from my condo's balcony, fresh off more than three weeks on the road.

By the time we'll speak again in a week, Halloween will have come and gone. Are you all ready for Halloween? What're you gonna dress as? I always go as PHP code. The horror!

The excitement is building for Spring Boot 4 and Spring Framework 7, both of which are scheduled to be released in November of 2025. So fun! There's a ton of good stuff to look at this week, so let's dive…

Large language model API costs can accumulate quickly when applications repeatedly send the same prompt content. A typical scenario: you're building a document analyzer that includes a 3,000-token document in every request. Five questions about that document means processing 15,000 tokens of identical content at full price.

Anthropic's prompt caching addresses this by allowing you to reuse previously processed prompt segments. Spring AI provides comprehensive support through strategic caching patterns that handle cache breakpoint placement and management automatically.

In this blog post, we…

I am pleased to announce the availability of Spring Modulith 2.0 RC1, 1.4.4, and 1.3.10. The latter two ship bug fixes and the general dependency upgrades. The release candidate primarily contains polish of the new features introduced in the milestone releases and a few new ones:

• Support for application-module-specific Flyway migrations #1067
• Upgrade to Spring Boot 4.0 RC1 #1415

Find more details about the releases in the full changelog.

I am pleased to announce that the first milestone of Spring Shell 4.0 is now available on Maven Central!

What's new?

This milestone release is the first step toward a modern version of Spring Shell, aligned with the rest of the Spring portfolio.

The main focus of this first milestone is alignment with Spring Framework 7 and Spring Boot 4.

Spring Shell 4.0.0-M1 is now based on Spring Framework 7.0.0-RC2 and Spring Boot 4.0.0-RC1.

For the complete list of changes, please check the release notes.

What's next?

We plan to release Spring Shell 4.0 GA in November, after the Spring Boot 4.0 GA release…

Hi, Spring fans! In this installment we talk to the Spring team engineer Dariusz Jędrzejczyk on the latest-and-greatest in the reactive world, MCP, and more

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.4.11 has been released and is now available from Maven Central.

This release includes 55 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.5.7 has been released and is now available from Maven Central.

This release includes 69 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 4.0.0-RC1 has been released and is now available from Maven Central.

This release includes 176 enhancements, documentation improvements, dependency upgrades, and bug fixes. Notable new features include:

• Completion of the modularization effort (including new test starters).
• Support for RestTestClient.
• Redis observability improvements

Please see the release notes for more details and upgrade instructions.

Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

On behalf of the team and all contributors, I am pleased to announce that Spring Batch 6.0.0-RC1 is now available from Maven Central!

This release candidate comes with following features and improvements:

• Graceful Shutdown support
• SEDA style with Spring Integration message channels
• Local chunking support
• Jackson 3 support
• Remote step support

For the complete list of changes, please check the release notes.

Graceful Shutdown support

Spring Batch 6.0 introduces support for graceful shutdown of batch jobs. This feature allows you to stop a running job execution in a controlled manner, ensuring…