Flight of the Flux 2 - Debugging Caveats

Engineering | Simon Baslé | April 16, 2019 | ...

This blog post is the second in a series of posts that aim at providing a deeper look into Reactor's more advanced concepts and inner workings.

It is derived from my Flight of the Flux talk, which content I found to be more adapted to a blog post format.

I'll update the table below with links when the other posts are published, but here is the planned content:

  1. Assembly vs Subscription
  2. Debugging caveats (this post)
  3. Hopping Threads and Schedulers
  4. Inner workings: work stealing
  5. Inner workings: operator fusion

If you're missing an introduction to Reactive Streams and the basic concepts of Reactor, head out to the site's learning section and the reference guide

Introducing Spring Cloud Circuit Breaker

Engineering | Ryan Baxter | April 16, 2019 | ...


When using a microservices architecture to build our applications, it is very common to end up with a pretty complex dependency tree amongst services. If the service down the dependency tree encounters an issue that causes it to start to respond slowly, it ends up causing a set of issues that cascade up the dependency tree. As more and more requests come in to the application, more and more resources may be consumed by waiting for the slow service to respond. Even worse, the additional load being put on the slow service may exacerbate the problem. To help alleviate the effect of…

This Week in Spring - April 16th, 2019

Engineering | Josh Long | April 16, 2019 | ...

Hi Spring fans! What a week it's been! When we last spoke I was in Capetown, South Africa or Johannesburg, South Africa. I've since been to Mauritius, back to Capetown, Serbia (for the amazing ITKonekt conference) and I'm now staring at the beautiful Bund river in beautiful Shanghai, China as I write this.

We've got a ton to get to this week, as usual, so let's get to it.

Spring Session for Apache Geode & Pivotal GemFire 2.2.0.M1 Available

Engineering | John Blum | April 12, 2019 | ...

I am pleased to announce the release of Spring Session for Apache Geode & Pivotal GemFire (SSDG), 2.2.0.M1.

This release focuses on dependency updates to align with the rest of the Spring portfolio in their respective release lines, building on:

  • Spring Framework 5.2.0.M1

  • Spring Data Moore-M3

  • Spring Session 2.2.0.M1

  • And is targeted for use in Spring Boot 2.2.0.M1

SSDG 2.2.0.M1 bits are available in the Spring libs-milestone repository (here).

What’s Next

Some of the proposed and upcoming features in the SSDG 2.2 release line include:

  • Attached Sessions (option).

  • Stronger Consistency (option) using Map.replace(key, oldValue, newValue) for lightweight transactions supplanting the need for heavier, cache/local transactions.

  • Improvements in PDX Serialization support.

  • And much more…​

Spring Session for Apache Geode & Pivotal GemFire 2.0.9.RELEASE & 2.1.3.RELEASE Available

Engineering | John Blum | April 12, 2019 | ...

I am pleased to announce the release of Spring Session for Apache Geode & Pivotal GemFire (SSDG), 2.0.9.RELEASE and 2.1.3.RELEASE.

Both of these releases focus on dependency updates to align with the rest of the Spring portfolio in their respective release lines.

SSDG 2.0.9.RELEASE builds on:

  • Spring Framework 5.0.13.RELEASE

  • Spring Data Kay-SR14

  • Spring Session 2.0.10.RELEASE (Apple-SR9)

  • And is targeted for use in Spring Boot 2.0.9.RELEASE.

SSDG 2.1.3.RELEASE builds on:

  • Spring Framework 5.1.6.RELESE

  • Spring Data Lovelace-SR6

  • Spring Session 2.1.5.RELEASE (Bean-SR4)

  • And is targeted for use in Spring Boot 2.1.4.RELEASE

Going Reactive with Spring, Coroutines and Kotlin Flow

Engineering | Sébastien Deleuze | April 12, 2019 | ...

Since we announced Spring Framework official support for Kotlin in January 2017, a lot of things happened. Kotlin was announced as an official Android development language at Google I/O 2017, we continued to improve the Kotlin support across Spring portfolio and Kotlin itself has continued to evolve with key new features like coroutines.

I would like to take the opportunity of the first milestone of Spring Framework 5.2 to give a status overview of where we are when it comes to Spring and Kotlin. And I will make my best to focus on concrete improvements since I believe Spring and Kotlin share…

Spring Data Lovelace SR6, Kay SR14, Ingalls SR20 Released

Engineering | Jens Schauder | April 10, 2019 | ...

On behalf of the entire team I’d like to announce the availability of three service releases for Spring Data release trains: Lovelace SR6, Kay SR14, and Ingalls SR20.

The releases are recommended upgrades as they contain fixes for a CVE in Spring Data JPA.

Spring Boot 2.1.4, 2.0.9, and 1.5.20 already pull in the above Spring Data versions, including the fixes that were released last week, and are now also available for use.

Here’s the content of the releases:

Spring Data Lovelace SR6

This Week in Spring - April 9th, 2019

Engineering | Josh Long | April 09, 2019 | ...

Hi Spring fans! Welcome to another wild-and-wacky week of This Week in Spring! I'm in Johannesburg, South Africa where I both spoke at the SpringOne Tour South Africa event and at the Johannesburg Java User Group. Had tons of fun on safari visiting (from the safety of a good deal of distance and an SUV) the utterly astonishing and beautiful - majestic - wildlife here. I can't stress that last part enough. The animals here are so, so, SO breathtaking. I got as close as I ever want to get to an elephant that was like a small house with eyes. Utterly massive! It towered over buses. When you go…

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