Update: a comprehensive Spring Boot + Kotlin tutorial is now available.

Just in time for Kotlin 1.0 release, we are adding support for Kotlin language to https://start.spring.io in order to make it easier to start new Spring Boot projects with this language.

This blog post is also an opportunity for me to explain why I find this language interesting, to show you a sample project in detail and to give you some tips.

What is Kotlin?

Kotlin is a language created by JetBrains. It runs on top of the JVM (but not only), it is an object oriented language that includes many ideas from functional programming. I won't go too much in details about all Kotlin features (PDF, HTML…

I was inspired by OpenZipkin contributor and Spring Cloud Sleuth and Zipkin contributor Adrian Cole's epic talk introducing Zipkin to write this particular post. There's so much epic stuff in that talk, so once you're done reading this, go watch that!

Advances in technology and cloud computing have made it easier to stand up and deploy services with ease. Cloud computing enables us to automate away the pain (from days or weeks (gasp!) to minutes!) associated with standing up new services. This increase in velocity in turn enables us to be more agile, to think about smaller batches of…

On behalf of the Spring Data team I'm happy to announce the first milestone of the Hopper release train. The release ships 250 tickets fixed! The most important new features are:

• Upgrade to Querydsl 4.
• Integration of Spring Data Neo4j 4.1, Spring Data Couchbase 2.1 and Spring Data Solr 2 (on Solr 5).
• Support for Redis Cluster.
• Support for projections on repository query methods in JPA and MongoDB (see the example for details).
• Addition of Spring Data Envers to the release train (previously maintained separately).

Find a curated changelog in our release train wiki or skim through a full list of changes in JIRA. We're shooting for a release candidate early March and a GA release at the…

In early March, I'll be speaking at VoxxedDays Vienna on the 1st, Riga Dev Day on the 2nd, as well as QCon London on the 7th. Aside from my 4.3 component model discussion, I'll also do a Spring Framework 5.0 preview & roadmap talk for the first time (in Riga as well as London).

Looking forward to those shows! See you there...

Juergen

On behalf of the community, I'm pleased to announce the release of Spring Session 1.1.0.RC1. The release can be found in the Spring Milestone Repository (https://repo.spring.io/milestone/).

This release contains lots of fixes and new features. You can find details in the What's New in 1.1 The highlights of 1.1.0.RC1 have been included below:

• Support for GemFire Thanks to John Blum!
• Allow writing to Redis immediately (instead of lazily) using redisFlushMode

We look forward to your feedback and if all goes well plan to release 1.1.0.RELEASE in the next few weeks.

Site | Documentation | Issues | …

We have an exciting announcement to make!

The Spring projects are about developing fast, flexible Java apps.

But there's a driving force behind the technology—its people. We open-source our projects to welcome our community into making Spring the best it can be.

Now we are taking another step in that direction. Each of the active Spring projects has adopted a Contributor Code of Conduct! You can look at the contributor code of conduct right here, and you'll find a copy in each of our repositories on Github.

We want people from minority groups in tech to feel welcome to contribute to Spring…

This is a cross-post blog from Simon BASLÉ from Couchbase. You can find him on twitter (@simonbasle) or github. Learn more about Couchbase and the Couchbase Java SDK on the developer portal. Thanks again, Simon and great job to you and your team! -Josh

Spring Data Couchbase 2.0 is a rewrite of the original Spring Data Couchbase 1.4.x connector. It is based on the Couchbase Java 2.2 SDK and makes heavy use of the new query language N1QL (which was introduced in Couchbase Server 4.0) to offer more features for Spring Data users.

The first Milestone has been released last august, then a Release…

At SpringOne2GX 2015, Juergen announced plans for Spring Framework 5 with a major focus on reactive architectures. Concrete efforts are already underway and a lot has happened since!

At the most basic level, reactive programming models allow for writing non-blocking services and applications. This requires a fundamental shift from writing imperative logic to async, non-blocking, functional-style code, in particular when interacting with external resources.

Reactive Web Applications

Most Java web applications are built on the Servlet API which was originally created with synchronous and…

Welcome to another installation of This Week in Spring! This week I'm in beautiful Stockholm, Sweden at the amazing JFokus conference. It's also Shrove Tuesday here in Sweden and the custom is to over-indulge, so as I type this I am eating a Semla. I hope you too enjoy over-indulging on this week's epic roundup!

• the world's worst kept secret is finally announced! We've been developing a reactive runtime for Spring MVC, and you can start to kick the tires! Check out this amazing blog on Spring 5's ambitions for reactive web programming!
• Spring Cloud Stream lead Marius Bogoevici has just announced Spring Cloud Stream 1.0.0.M4 which, among other things, defaults to publish/subscribe semantics, supports a notion of consumer groups, provides a simplified binder SPI, resettable Kafka offsets, and so much more! Check it out!
• the 2.0.0.RELEASE of Spring Data Couchbase just dropped!…