Hi Spring fans, and Happy Halloween from the Spring team to those who celebrate!

I hope your evening is fun and your day free of scary bugs!

My friends, we've got some interesting stuff to look at this week so let's dive right into it.

• A Bootiful Podcast: Mr. Spring in Action, Craig Walls
• Spring Cloud Stream Applications 2022.0.0 available now
• Spring Statemachine 4.0.0-M1 is now available
• laech/java-stacksrc: Decorates stack traces with source code snippets. - this is super cool. It's a way to decorate stack traces with source code snippets.
• Blog: Introducing ingress2gateway; Simplifying Upgrades to Gateway API
• Blog: Plants, process and parties: the Kubernetes 1.28 release interview
…

Reactor 3.6.0 is coming and going to be GA on November 14. This blogpost describes new features that are included in this upcoming release!

Virtual Threads support

Today, everyone talks about Java 21 and Project Loom. The Project Reactor team hears that and sees value in that project within our ecosystem. With this upcoming release, we introduce support for the VirtualThread implementation.

Why is it handy?

Let's consider the following code sample:

package io.projectreactor.samples;

import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.stream.Stream;

import reactor.core…

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 sunny Las vegas, NV! Did you miss it?

Hi, Spring fans! This week I'm in Lisbon, and Porto, Portugal, ahead of the Porto Tech Hub event in Porto, and my tour bus is about to leave! So, let's dive right into it!

• Spring Authorization Server 1.1.3, 1.0.4 and 0.4.4 available now
• Spring Authorization Server 1.2.0-RC1 available now
• Spring Boot 2.7.17 available now
• Spring Boot 3.2.0-RC1 available now
• Spring Modulith 1.1 RC1 and 1.0.2 released - this is quickly turning into one of my favorite new projects and is well worth your attention, too. It's a structured way to build well-designed, elegant, modular monoliths (or moduliths), but it…

Other parts in this blog series

Part 1: Introduction to Transactions in Spring Cloud Stream Kafka Applications

Part 2: Producer Initiated Transactions in Spring Cloud Stream Kafka Applications

Part 3: Synchronizing with External Transaction Managers in Spring Cloud Stream Kafka Applications

Part 4: Transactional Rollback Strategies with Spring Cloud Stream and Apache Kafka

Part 5: Apache Kafka’s Exactly-Once Semantics in Spring Cloud Stream Kafka Applications

In this last part of this blog series, we dive into a relatively new design pattern first proposed by Chris Richardson but seeing it from the perspective of Spring Cloud Stream. We will see what the outbox pattern is, how it works, and a few strategies to adapt when using Spring Cloud Stream and Apache Kafka. See the descriptions here…

Hi, Spring fans! In this installment Josh Long talks to VMware vice president Betty Junod about VMware, its amazing ecosystem, and so much more.

Hi, Spring fans! Welcome to yet another installment of This Week in Spring! It's October 17th, 2023, and I am here in Montreal, Canada, and then I'm off to Salt Lake City, Utah on Thursday for the Java User Group there. Don't miss it!

We've got a lot to cover this week so let's dive right into it!

• Apache Kafka's Exactly-Once Semantics in Spring Cloud Stream Kafka Applications
• Guide to Modulith with Spring Boot - Piotr's TechBlog
• Runtime efficiency with Spring (today and tomorrow)
• Spring Data 2023.0.5, 2022.0.11, and 2021.2.17 released
• Spring Framework 6.0.13 available now
• Transactional Rollback Strategies with Spring Cloud Stream and Apache Kafka
• Using Records as Projections in JPA
…

Other parts in this blog series

Part 1: Introduction to Transactions in Spring Cloud Stream Kafka Applications

Part 2: Producer Initiated Transactions in Spring Cloud Stream Kafka Applications

Part 3: Synchronizing with External Transaction Managers in Spring Cloud Stream Kafka Applications

Part 4: Transactional Rollback Strategies with Spring Cloud Stream and Apache Kafka

With the fundamental analysis of how transactions work with Spring Cloud Stream Kafka applications out of the way from our previous discussions in this series, we have finally arrived at the elephant in the room: the exactly-once semantics, a much-discussed and required feature in streaming applications. In this part of this blog series, we look at how you can get exactly-once semantics in Spring Cloud Stream applications via Apache Kafka transactions. The knowledge of how transactions work from the previous sections makes it relatively easy to understand how Spring Cloud Stream Kafka applications achieve…

With Spring Framework 6.1 and Spring Boot 3.2 general availability approaching, we would like to share an overview about several efforts the Spring team is pursuing to allow developers to optimize the runtime efficiency of their applications.

We are going to cover the following technologies and use cases:

• Spring MVC as a lean Virtual Threads web stack on JDK 21
• Optimized container deployment with Spring and GraalVM Native Image
• JVM Checkpoint Restore: Scale to zero with Spring and Project CRaC
• A glimpse into OpenJDK’s future with Spring AOT and Project Leyden

If you prefer watching a video…