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This Week in Spring - December 18th, 2018

Hi Spring fans!

Welcome to another installment of This Week in Spring! I just wrapped up the last two talks or workshops I’ll do this year. Yesterday we spent four hours looking at Reactive Spring and today we spent four hours looking at Spring Boot and Kotlin. I love doing these sorts of trainings because I really get to dive deep on topics with my audiences. It’s, truly, one of the rare pleasures in an otherwise hectic schedule. Needless to say, I am super relaxed and happy as I write this and I hope you are too!


Spring CredHub 2.0.0.RC1 released

I’m pleased to announce the first release candidate of Spring CredHub 2.0.0, available now in the Spring milestone repository. A GA release of Spring CredHub 2.0.0 will be available in a few weeks.


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.


Spring Cloud Greenwich.RC1 available now

On behalf of the community, I am pleased to announce that the Release Candidate 1 (RC1) of the Spring Cloud Greenwich Release Train is available today. The release can be found in Spring Milestone repository. You can check out the Greenwich release notes for more information.

End of Life (EOL) Reminder

The Dalston release train will reach EOL status at the end of 2018.

Notable Changes in the Greenwich Release Train

This milestone is compatible with Spring Boot 2.1.1.RELEASE. Updates were made across the projects for Java 11 compatibility.


Spring Data R2DBC 1.0 M1 released

It’s my pleasure to announce the first milestone of Spring Data R2DBC. Spring Data R2DBC is Spring’s client project for R2DBC. With Spring Data R2DBC you get end to end reactive ad-hoc query execution and Spring Data repositories for relational databases.

Spring Data R2DBC embraces functional-reactive integration of relational databases by providing DatabaseClient as its central abstraction. The following example shows how to bootstrap DatabaseClient without spinning up a Spring context:

PostgresqlConnectionFactory connFactory = new PostgresqlConnectionFactory(

DatabaseClient databaseClient = DatabaseClient.create(connFactory);

How Fast is Spring?

Performance has always been one of the top priorities of the Spring Engineering team, and we are continually monitoring and responding to changes and to feedback. Some fairly intense and precise work has been done recently (in the last 2-3 years) and this article is here to help you to find the results of that work and to learn how to measure and improve performance in your own applications. The headline is that Spring Boot 2.1 and Spring 5.1 have some quite nice optimizations for startup time and heap usage. Here’s a graph made by measuring startup time for heap constrained apps:


This Week in Spring - December 11, 2018

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 Data Moore M1 released

On behalf of the Spring Data team, I’m pleased to announce the availability of the first milestone of the Moore release train.

Notable changes include:


Spring REST Docs 2.0.3.RELEASE

It’s my pleasure to announce that Spring REST Docs 2.0.3.RELEASE is available from Maven Central, JCenter, and our release repository. My thanks to everyone who contributed to this release by reporting bugs and opening pull requests.

This maintenance release includes a small number of fixes and documentation improvements. It is a recommend upgrade for all Spring REST Docs 2.x users.

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