The Spring team is out in force here at Devnexus! I hope you'll come see us. Here's my annotated look at what sessions I want to see over the oh-so-brief three days of the show.

Tuesday, April 4th, 2023

The fun starts today, with the Spring Boot 3 workshop with Spring Boot cofounder Phil Webb and Micrometer and observability ninja Jonatan Ivanov

Wednesday, April 5th, 2023

Tomorrow, the fun continues! At 10am, our friends over at Vaadin will have a talk, Full Stack Reactive with Spring Boot and React, that looks mighty interesting! My friends and Nate Schutta and Dan Vega have a talk, Spring Recipes: A Collection of Common-Sense Solutions…

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 community this week at Devnexus 2023!

• Spring Web Flow 3.0 RC1 Released
• in last weeks' A Bootiful Podcast, I talked to Spring Integration lead Artem Bilan
• Announcing Spring Cloud Gateway for Kubernetes 2.0
• Blog: Kubernetes Validating Admission Policies: A Practical Example
• Context Propagation with Project Reactor 2 - The bumpy road of Spring Cloud Sleuth
• Context Propagation with Project Reactor 3 - Unified Bridging between Reactive and Imperative
• the good Dr. Dave Syer shares our friend Jacky's extension to the Apache Maven Toolchains plugin
• Spring Cloud 2022.0.2 Is Available
• …

I'm pleased to announce that Spring Web Flow 3.0 RC1 is now available from the Spring milestone repository.

As mentioned in the 3.0 M1 announcement, milestone 1 did not include JSF support. This release changes that and upgrades the Spring Faces module to a Spring Framework 6, Jakarta EE, and Java 17 baseline. The spring-webflow-samples, including JSF samples, have been upgraded to the latest, and you can use sample changes as pointers for your own upgrades.

Spring Web Flow has also migrated from JIRA to GitHub issues recently, and that means you can now search, create, and watch both issues and pull requests, from the project's GitHub issues…

Hi, Spring fans! In this installment Josh Long (@starbuxman) talks to Spring Integration lead Artem Bilan (@artem_bilan) about the latest and greatest in Spring Integration. Spring Integration makes it easier to connect an increasingly larger ecosystem of disparate services and systems.

SHOW NOTES:

• I wrote an e-book on AOT and GraalVM support in Spring Boot 3
• did u see that Spring Tips video I did last week on Vaadin?
• Check out this roving 1 hour tour of Spring Boot 3 over on the Jetbrains IntelliJ IDEA channel
• I did a 6m video looking at Spring Boot 3 for the impatient on my channel
• See you soon at Devnexus, Kotlin Conf, and Devoxx France!
…

On behalf of the community, I am pleased to announce that the General Availability (RELEASE) of the Spring Cloud 2022.0.2 Release Train is available today. The release can be found in Maven Central. You can check out the 2022.0.2 release notes for more information.

Notable Changes in the 2022.0.2 Release Train

See all issues and pull requests included in this release here.

Spring Cloud Kubernetes

• Added support for external name services using the Fabric8 DiscoveryClient (#1243)
• Add Pod metadata and annotations to ServiceInstance (#1254)

Spring Cloud Contract

• Allow sendMessage to handle body from file (.1867)
• Relaxed SSL validation with RestTemplate interceptors (#1869)
…

This post is a part of a series:

1. The Basics
2. The bumpy road of Spring Cloud Sleuth
3. Unified Bridging between Reactive and Imperative

We concluded the last article with the thought that Spring Cloud Sleuth’s MANUAL context propagation strategy is both performant and provides correct semantics. Out of many experiences, the Spring, Micrometer, and Reactor teams created a new context-propagation library. Its goal is to encapsulate the concern of transporting contextual data between ThreadLocal values and Map-like structures. Both Micrometer 1.10 and Reactor 3.5 build on top of it to provide a first-class experience between Reactor and imperative code. By using Reactor Context, we implicitly expose ThreadLocal…

This post is a part of a series:

1. The Basics
2. The bumpy road of Spring Cloud Sleuth
3. Unified Bridging between Reactive and Imperative

Spring Cloud Sleuth recently became Micrometer Tracing, part of the Micrometer project. Most of the tracing instrumentation is centered within Micrometer under the new Observability API. The goal of these projects is to enable observability of any application – in the form of metrics, tracing, and logs that contain correlation identifiers. To achieve this goal, libraries require a way to transport contextual information. When applications deal with asynchrony in any form, that task becomes quite a challenge. In the previous article, we went through the basics of context propagation with …

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 all this cool stuff to read this week; I can really savor each article! Let's dive in!

• Context Propagation with Project Reactor 1 - The Basics
• Introduction to Grafana Loki
• JDK 20 Release Notes
• Not Spring Boot, per se, but this is interesting if you're developing against Kubernetes and want a quick introduction: Lightweight Kubernetes Distributions
• Run a Spring Boot Application in AWS Lambda
• SAML with Spring Boot and Spring Security
• Spring Boot 2.7.10 available now
• Spring Integration for AWS 3.0.0-M2 and Spring Cloud Stream Kinesis Binder 4.0.0-M1 Available
• Spring Kafka: Configure Multiple Listeners on Same Topic
• Spring Modulith 0.5.1 released
• …

This post is a part of a series:

1. The Basics
2. The bumpy road of Spring Cloud Sleuth
3. Unified Bridging between Reactive and Imperative

Spring Boot 3 and Spring Framework 6 brought us a unified and consistent way to enable Observability in applications that use Micrometer. The evolution from Spring Cloud Sleuth to Micrometer, along with the Observation API and Micrometer Tracing, made us consolidate various approaches to context propagation. In this blog post series, we aim to explain how we came to support context propagation in Project Reactor to meet the needs of imperative libraries. By…