Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm writing this installment from a hotel room in Dallas, Texas, in the USA. Last night I had the privilege of hanging out with some of my friends from the local Java scene. Today I meet with customers. It's going to be a nice few days indeed.

• Spring Authorization Server 1.0.1 and 0.4.1 available now
• Spring Authorization Server 1.1.0-M1 available now
• Spring Boot 2.7.9 available now
• Spring Boot 3.1.0-M1 available now
• Did you see this amazing video on Spring Framework 6: Infrastructure Themes by Spring cofounder and Spring Framework lead Juergen Hoeller? It's awesome!
• Spring Shell 2.1.7, 3.0.1 and 3.1.0-M1 are now available
• I loved this blog by Apache Tomcat team's Mark Thomas on some of the implications of using Project Loom when building web applications with Project Loom and Apache Tomcat…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Shell 2.1.7, 3.0.1 and 3.1.0-M1 has been released and is now available from Maven Central and https://repo.spring.io/milestone respectively.

Please see the release notes 2.1.7, release notes 3.0.1 and release notes 3.1.0-M1 for more details.

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

How can you help?

Project Page | GitHub | Issues | Documentation

Introduction

Project Loom aims to bring "easy-to-use, high-throughput, lightweight concurrency" to the JRE. One feature introduced by Project Loom is virtual threads. In this blog post, we'll be exploring what virtual threads mean for web applications using some simple web applications deployed on Apache Tomcat.

High-throughput / Lightweight

The first experiment was to compare the overhead associated with using Tomcat's standard thread pool to the overhead associated with using a virtual thread (Loom) based executor. The test environment used is detailed at the end of this post. Performance…

"If it's fun, do it more often" or so they say. Unfortunately, the just announced 0.4 release of Spring Modulith shipped a tiny glitch we could fix rather quickly, to immediately issue a 0.4.1 one. We were also able to sneak in an additional dependency upgrade to the just released jMolecules 2022.2.3.

Find a complete change log in the GitHub release page. We are looking forward to your feedback in the GitHub discussions.

On behalf of the community, I am pleased to announce that the General Availability (RELEASE) of the Spring Cloud 2021.0.6 Release Train is available today. The release can be found in Maven Central. You can check out the 2021.0.6 release notes for more information.

Notable Changes in the 2021.0.6 Release Train

See the project page for all the issues and pull requests included in this release.

Spring Cloud Commons

• Add utility method to configure zone-preference load-balancing with user-provided zone (#1174)

Spring Cloud Netflix

• Allow setting timeouts for fetching instances (#4110)

Spring…

What is the Spring Cloud Function?

Spring Cloud Function is a SpringBoot-based framework allowing users to concentrate on their business logic by implementing them as Java Functions (i.e., Supplier, Function, Consumer). In turn the framework provides necessary abstraction to enable execution of these functions in various environments (e.g., REST, Streaming) as well as serverless environments such as AWS Lambda or Azure Functions, without having to worry about the underlying platform-specific details. This allows developers to focus on writing their business logic and let the framework handle…

Dear Spring community, I am excited to announce the release of Spring Modulith 0.4. The release ships with the following new features:

• A new Scenario API to allow the concise definition of integration tests for application modules, specifically tailored around the idea of them integrating via asynchronously handled, transaction bound events.
• A new starter that allows to pull in the runtime support in a concise way, primarily to ease the usage of ApplicationModuleInitializers (GH-132).
• The event publication registry now returns uncompleted events in ascending order of their publication dates (GH-133) and provides better logging (GH-125).
• A few tiny optimizations in our documentation generation support, especially if the UML style is for component diagrams (GH-130, GH-140, GH-141…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.1.0-M1 has been released and is now available from https://repo.spring.io/milestone.

This release includes 105 enhancements, documentation improvements, dependency upgrades, and bug fixes. Notable new features include:

• Different log levels for file and console
• Maximum HTTP Response Header Size
• Many dependency upgrades

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?

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 or chat with the community on Gitter…

Hi, Spring fans! Today Josh Long (@starbuxman) talks to Atlanta JUG, Devnexus, Spring Cloud Task, Spring Integration, Spring Cloud Dataflow luminary, and the living embodiment of the word "joy:" Glenn Renfro (@cppwfs) 

Watch the podcast in living color on Youtube!