The Spring Blog

News and Events

Spring CredHub 2.0.0.M1 released

I’m pleased to announce the first milestone release of Spring CredHub 2.0.0, available now in the Spring milestone repository.


CredHub provides centralized credential management to the Cloud Foundry platform. CredHub implements an HTTP API to securely store, generate, retrieve, and delete credentials of various types.

Spring CredHub provides a Java binding for the CredHub API, making it easy to integrate Spring applications with CredHub.

What’s New

The 2.0.0 release brings support for CredHub server versions 1.x and 2.x, and the CredHub v1 and v2 APIs. This release also provides compatibility with Spring Framework 5 and Spring Boot 2. The GA release of Spring CredHub 2.0.0 will add a reactive alternative to the existing interfaces.


Reactor Bismuth-SR13 and Californium-SR2 available now !

Californium Update

On behalf of the Reactor team, I am pleased to announce that Californium-SR2 release train is available now.

This maintenance release of the Californium line includes the following dependencies updates:

Bismuth Update

We also have shipped Bismuth-SR13. This maintenance release of the Bismuth line includes the following dependencies updates:


This Week in Spring - October 30th, 2018

Hi Spring fans! Welcome to another installment of This Week in Spring! This week I’m in Paris, France, for the amazing Voxxed Microservices event. This has been quite the show and I’m grateful for having had the opportunity to be there. Now, as I write this, I’m preparing to go to Beijing, China, for the first leg in Asia of the SpringOne Tour show. I’ll be in China, then Japan, then Korea, Singapore, Hong Kong, Taiwan, Los Angeles, Morocco, Seattle, Toronto, and then finally - in mid December - I’ll return home to San Francisco. We’ve got a ton of things to look at this week so, without further ado…


Spring Cloud Stream Fishtown.RC1 /2.1.0.RC1 Release Announcement

We are pleased to announce the first Release Candidate of the Spring Cloud Stream Fishtown release train - Fishtown.RC1/2.1.0.RC1.

Spring Cloud Stream Fishtown 2.1.0.RC1 is available for use in the Spring Milestone repository.

The following section provides a brief summary of features and improvements included in this release.

Notable Dependency Upgrades

  • Spring Boot 2.1.0.RC1
  • Reactor Californium.RELEASE
  • Spring Cloud Function 2.1.0.RC1

Spring Cloud Function support

The main theme for this release is the introduction of a new programming model which uses Spring Cloud Function as an alternative for defining stream handlers and sources which can now be expressed as beans of
type java.util.function.[Supplier/Function/Consumer]


Announcing Spring Cloud Function - 2.0.0.RC1

We are pleased to announce the first Release Candidate of the Spring Cloud Function - 2.0.0.RC1.

Individual modules of Spring Cloud Function 2.0.0.RC1 are available for use in the Spring Milestone repository.

Aside form general enhancements and bug fixes, This release encompasses the following:


Spring Session for Apache Geode/Pivotal GemFire 2.0.6.RELEASE and 2.1.0.RELEASE Available!

Good things come in pairs, so I am happy to announce the availability of Spring Session for Apache Geode & Pivotal GemFire (SSDG) 2.0.6.RELEASE and 2.1.0.RELEASE.

SSDG 2.0.6.RELEASE, based on Spring Framework 5.0.10.RELEASE, Spring Data Kay-SR11 and Spring Session core 2.0.7.RELEASE mainly contains dependency updates.

SSDG 2.1.0.RELEASE, on the other hand, has been upgraded to Spring Framework 5.1.1.RELEASE, Spring Data Lovelace-SR1 and Spring Session core 2.1.0.RELEASE, and additionally includes support for custom Session expiration policies and rules.


This Week in Spring, October 23rd, 2018 - Oracle CodeOne Edition

Hi Spring fans! Welcome to another installment of This Week in Spring! This week I’ve just flown back from Canada and Russia where I was at the amazing Joker conference in St. Petersburg. I’m now in San Francisco (where I live!) for a couple of days to soak up the amazing atmosphere around Oracle CodeOne, reunited with the Java community and longtime friends. I’m so excited about the presentation that fellow Java Champion Trisha Gee and I are doing tomorrow at 11:30 am that introduces an end-to-end reactive and Spring-based application from JavaFX client to service. Do not miss this!


Functional Bean Registrations in Spring Cloud Function

Spring Cloud Function has a couple of new features in 2.0 (still in milestone phase), and possibly the most dramatic is the ability to go "fully functional". This is made possible by changes in Spring Boot 2.1 together with Spring Framework 5.1, and it means a different way of thinking about bean definitions in Spring applications, but also significant improvements in startup performance.

AWS Cost Savings

It’s always good to start with a picture, especially if it tells a story. Here’s a graph that shows the improvement in Spring Cloud Function 2.0 over 1.0, comparing the cost of cold starts in AWS:

Memory Cost

The x-axis is memory in MB, and the y-axis is cost of a cold start in GBsec. The most dramatic effect is for low memory containers, where the cost is almost 4 times lower with 2.0. The "Custom" function is even faster (10x over Spring Cloud Function 1.0) - it’s a custom AWS runtime using Spring Cloud Function with functional beans. The origin of the improvement is in dramatically shorter startup times, which in turn come from using the functional form of bean definitions in the application. Josh made a video about functional bean registration a while ago if you need an introduction (it’s on YouTube). Now let’s have a closer look at how it works in Spring Cloud Function.


How Welcoming is the Spring Community for Apprentice Developers? A Recent Survey Says We Can Do Better.

Just starting your dev career? Check out this last report on the JVM ecosystem. Simon Maple, Andrew Binstock, and many others have done developers of all skill levels a great service with this data.