The Spring Blog

Hi Spring fans! In this installment of Spring Tips we look at how to use Spring to work with infrastructure on the Google Cloud Platform (GCP)

speaker: Josh Long

Hi Spring fans and welcome to another installment of This Week in Spring! This week I’ve been in Seattle, WA and now I’m off to Toronto, Canada for the epic SpringOne Tour Toronto edition, the last SpringOne Tour for the year, too! (Can you believe we’re now less than 22 days from 2019? Time sure flies when you’re having fun!)

• Spring Tips is back! And what a season have we planned for you! Last week we introduced the first new video, this one looking at the Spring support for Microsoft Azure. As always, you can see the whole playlist at the Spring Tips YouTube Playlist and you should check back on this very blog every Wednesday for the next few months for new installments.
• Spring Data Moore M1 released
• Spring REST Docs 2.0.3.RELEASE
• Spring REST Docs 1.2.6.RELEASE
• RabbitMQ Best Practices
• Reactive Programming and Relational Databases
• Spring IO Platform Cairo-SR6
• Spring Tools 4.0.2 released
• I liked this StackOverflow question and the subsequent answer from JUnit 5 and Spring Test Framework lead Sam Brannen on how to get the effect of @IfProfileValue in a JUnit 5-based Spring application test
• This new change to OpenZipkin supporting correlation of events in the Java Flight Recorder looks very interesting, wouldn’t you say? Any “thumbs up” are appreciated!
• Speaking of Zipkin, it just passed a big milestone: the 10,000th person to star Zipkin on Github!
• Check out this cool feature that makes your Spring Cloud Gateway filters aware of things like path variables
• This looks like it could be an interesting video on Spring transaction management
• Baeldung has a nice post on debugging Reactive Streams in Spring 5
• Knative momentum continues, hits another adoption milestone
• Want to learn more about testing Spring applications? Check out my vJUG talk from a few months ago
• The first commerically supported tracing tool to support Zipkin-formatted data with zero changes, natively, has just been announced: Codecentric’s Instana
• Pivotal have a nice whitepaper on supersonic application development and delivery with Spring Boot and Pivotal Cloud Foundry
• Want to use RabbitMQ in a reactive context - and why wouldn’t you? Now you can! Reactor RabbitMQ 1.0.0 GA is released!
• Not stricly related to Spring, but interesting nonetheless: a non-exhaustive but interesting list of JDBC Driver Connection URL strings
• Auth0 have a nice Spring WebFlux tutorial
• Check out, and feedback, on the new Spring Data Kotlin extension!
• Pivotal announces new serverless framework - Pivotal Function Service
• Demystifying Tracking Event Processors in Axon Framework
• Speaking of Axon, here’s a nice (albeit slightly older) Italian-language post on CQRS with Spring and Axon, or CQRS con Spring e Axon
• The design process is an iterative one. “The most deadly thing in software is the concept.. that you are going to specify what you are going to do, and then do it.” - that from a 1968 NATO Software Engineering Conference!
• This Stackoverflow question, “Why Java takes much more RAM than -Xmx?”, is well worth a read.
• Spring Tools 4.0.2 released, grab the latest
• This project, demonstrating Spring Boot 2, GraphQL, Angular and more, might be helpful if that’s a usecase you have
• Again, not strictly speaking related to Spring, but this is interesting. It’s a look at Java startup time from Java 8 through Java 11
• JaVers 5.0.0 has been released. This major release makes JaVers fully compatible with Spring Boot 2.1 and Spring Framework 5.1. JaVers is a framework to support auditing objects.
• Grails 3.3.9 released with GORM 6.1.11, Spring Boot 1.5.18, Spring 4.3.21.RELEASE

Imperative code eats threads at the pace of incoming requests while Software is eating the world. This post discusses the assumptions for reactive programming on the JVM and what this means for integrations – in particular, relational databases.

The motivation to come up with a post is the constant increase in reactive programming adoption while some major building blocks are not yet available – in particular, the question: What about relational databases?

What is Reactive Programming

There are a lot of answers about what Reactive Programming is and how this compares to Reactive Systems. I see Reactive Programming as a programming model that facilitates scalability and stability by creating event-driven non-blocking functional pipelines that react to availability and processability of resources. Deferred execution, concurrency and asynchronicity are only a consequence of the underlying programming model.

Hi Spring fans! In this installment of Spring Tips we look at how to use Spring to work with infrastructure on Microsoft Azure

speaker: Josh Long

Hi Spring fans and welcome to another installment of This Week in Spring! Today I concluded my brief time in Paris, France, for the epic SpringOne Tour event and I’ll be off to Milan, Italy, in about 12 hours where I’ll be speaking at the Milano JUG Wednesday night. Ci saro presto, Milano!

Tomorrow we’ll have the first installment of season 5 of Spring Tips available so be sure to check this space soon and every Wednesday until we’ve exhausted all 11 episodes!

• There’s a lot to love in the new Spring Tool Suite 4 release!
• Spring Session Bean-SR1 and Apple-SR7 Released
• Spring Boot 2.1.1 available now
• Spring Boot 2.0.7 available now
• Want to learn the ways that Pivotal Cloud Foundry supports you on Amazon Web Services (AWS)?
• Spring IO Platform Brussels-SR15
• Spring Security 5.1.2, 5.0.10, 4.2.10 Released
• Spring Boot 1.5.18 available now
• Check this out! This Month in RabbitMQ, Dec 4, 2018
• Check out these new Spring Security first-timer issues.
• I dig Maciej Walkowiak’s walkthrough of developing complete reactive Spring applications with Spring WebFlux, Spring Data Redis, Test Containers, Lombok and of course Spring Boot
• Matt Raible’s published the slides from his “Bootiful Development with Spring Boot and Vue” talk this evening.
• Not stricly speaking related to Spring, but still interesting. It’s a French-language post on observing Java applications with Metricbeat and Jolokia over on the Elastic blog
• This is an oldie-but-a-goodie over on JavaWorld: mastering Spring framework 5, Part 2: Spring WebFlux | JavaWorld
• Nice article offering insights on tuning an Apache Camel application deployed into Spring Boot over on the JBoss Middleware blog.
• I love these Chinese-language videos on using project Reactor
• I love Spring Framework lead Juergen Hoeller’s SpringOne Platform 2018 presentation, Spring Framework 5.1 on JDK 8 & 11, now up on InfoQ
• Be sure to not miss Ben Hale, Mark Paluch and Ryland Degnan’s upcoming webinar on R2DBC and RSocketIO on Dec 6
• This is a nice post on customizing error responses in a Spring Boot application
• Don’t miss the upcoming webinar on continuous delivery to the cloud with Spinnaker
• Yet another epic installment of the Talking Kotlin podcast on monitoring applications with Micrometer’s own Jon Schneider
• The Spring team’s epic Greg L. Turnquist has been busy pruning a lot of relics from the Spring guides from the old pre-1.0 days of Spring Boot
• Expedia have a nice UI, Haystack, that can be paired with Zipkin. Cool!
• Vladimír Oraný has a nice 10-part series on writing builder style DSLs in Apache Groovy.
• The Baeldung blog has a nice post on testing in Spring Boot
• Check out the JHipster Kotlin 0.6.0 support
• This is a prettu epic post on getting started with Spring Boot, JOOQ, Flyway, and ModelMapper on the Cantina blog
• Riff v0.2.0 is now available
• This post - which looks at dynamic Flow Control during Backpressure with RxJava and RSockets - also maps nicely to Reactor concepts.

Hi Spring fans! Welcome to another installment of This Week in Spring! This week I’m in Marikesh, Morocco for the epic Devoxx MA talking about all things Spring and cloud with my friends - Google’s Ray Tsang and Microsoft’s Bruno Borges. Then, tomorrow it’s off to Bern and Zurich Switzerland [for the local JUGs there. Tonight, in about 15 minutes, I’m doing a live training on Safari - “Bootiful Kotlin,” too.

As usual, we’ve got a ton of things to cover so let’s get to it!

• Spring Framework 5.1.3, 5.0.11 and 4.3.21 available now
• Spring Cloud Greenwich.M3 is available
• Join individuals like you who donated more than $70K over the past year to help support 350+ community-driven, Open Source software projects developed at the all-volunteer Apache Software Foundation.
• Wondering what affects availability in Pivotal CF? Denise Yu and Josh McKenty explain in this comic
• The Neo4j team are happy to announce the first release of the Neo4j and Apache Kafka integration.
• Spring Data ninja Mark Paluch has just previewed typesafe Kotlin queries for Spring Data MongoDB
• Check out Okta developer advocate Matt Raible’s epic post, Spring Boot 2.1: Outstanding OIDC, OAuth 2.0, and Reactive API Support
• I love this thread on tools that are useful that have come out of the development of Spring Boot
• The Redis Client Lettuce 5.1.3.RELEASE has been released
• Gradle 5.0 has been released, and in this release the Kotlin DSL for build scripts is now production-ready!
• Nice post on making Kafka and RabbitMQ integration easier with Spring Cloud Stream
• I love this new software-defined delivery manfiesto coming from Atomist CEO and Spring founder Rod Johnson
• Check out v0.1 of a datasource-proxy for R2DBC, the open-sourced, reactive SQL-data access SPI from your friends at Pivotal and beyond.
• Also, I like this example of tracing with Spring Cloud sleuth and R2DBC](https://github.com/ttddyy/datasource-proxy-r2dbc#distributed-tracing)
• Hat tip to Michael Hunger: "If you’re interested in polyglot (R, python, ruby, js, llvm bitcode, java) execution on GraalVM and the AOT capabilities, this three hour presentation by Oleg and Thomas from Devoxx is really amazing and full of demos
• Check out Dieter Hubau’s slides for a presentation introducing KNative, Istio, Project Riff and Spring Cloud Function
• Check out this great video by James Watters on the power of BOSH: BOSH is the magic sauce behind VMware and Pivotal’s PKS
• There has been amazing progress being made on Apache Tomcat translations and still lots to do. Come and help us at
• Spring Cloud co-founder has this to offer regarding the future of Hystrix in Spring Cloud, now that Netflix have officially deprecated it: "2 things. Watch for a blog post on early December. Also, we will continue to support folks using hystrix through Spring Cloud Netflix. Ribbon has been in a similar state for more than two years and we have supported it the whole time
• Check out Spring Test Framework lead and JUnit 5 lead Sam Brannen’s super fast introduction to JUnit5
• Check out this webcast on what’s new in Gradle 5.0
• R2DBC 1.0 M6 is out and it has SQL Server, H2 and PostgreSQL bindings you can try.

Hi Spring fans! How’s things? I’m in Taipei, Taiwan, where I’ve presented at the local JUG and at the Cloud Native Forum. It’s been a crazy good time on the ground eating delicious “stinky tofu” (that’s its name!), trying to figure out the difference between traditional Chinese characters and so-called simplified Chinese characters used in China, and of course making tons of new friends.

In less than 24h I’ll be on a plane winging my way back west where I’ll join my family, and our newest addition, and our friends, and we’ll celebrate the Thanksgiving holiday together. It’s this time of year when I try to take stock of all the things for which I’m grateful and you know what, dear reader? Time and time again, I think of you, the community that makes Spring the best place to integrate and innovate. I am thankful for you. I’m sure I speak for the Spring team and Pivotal at large when I say, we are thankful for you.

We are pleased to announce the second Release Candidate of the Spring Cloud Stream Fishtown release train - Fishtown.RC2/2.1.0.RC2.

Spring Cloud Stream Fishtown 2.1.0.RC2 is available for use in the Spring Milestone repository.

As a follow up to 2.0.0.RC2, this release primarily encompasses minor enhancements and bug fixes.
As it stands now this should be the final Release Candidate before General Availability release 2.0.0.RELEASE in several weeks.

NOTE:
If the applications are created from Spring Initializr, they need to add this BOM snippet in maven dependency management before the spring-cloud BOM declaration, otherwise you’ll end up with the latest snapshot:

<dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-stream-dependencies</artifactId>
           <version>Fishtown.RC2</version>
           <type>pom</type>
           <scope>import</scope>
</dependency>

We are pleased to announce the second Release Candidate of the Spring Cloud Function - 2.0.0.RC2.

Individual modules of Spring Cloud Function 2.0.0.RC2 are available for use in the Spring Milestone repository.

As a follow up to 2.0.0.RC1, this release primarily encompasses minor enhancements and bug fixes.
As it stands now this should be the final Release Candidate before General Availability release 2.0.0.RELEASE in several weeks.

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-cloud-function tag.