Developing Spring Boot applications with Kotlin

Engineering | Sébastien Deleuze | February 15, 2016 | ...

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 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

Spring Data Release Train Hopper M1 Released

Releases | Oliver Drotbohm | February 12, 2016 | ...

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…

Spring Session 1.1.0 RC1 Released

Releases | Rob Winch | February 11, 2016 | ...

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 (

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:

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 adopted a Contributor Code of Conduct!

News | Chelsea Troy | February 10, 2016 | ...

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…

Spring Data Couchbase 2.0

Engineering | Josh Long | February 10, 2016 | ...

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…

This Week in Spring - February 9th, 2016

Engineering | Josh Long | February 09, 2016 | ...

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!

SpringOne2GX 2015 replay: IoT Realized - The Connected Car v2

News | Pieter Humphrey | February 09, 2016 | ...

Recorded at SpringOne2GX Presenters: Phil Berman, Michael Minella & Derrick Shields Big Data Track Slides:

For this session we will explore the power of Spring XD in the context of the Internet of Things (IoT). We will look at a solution developed with Spring XD to stream real time analytics from a moving car using open standards. Ingestion of the real time data (location, speed, engine diagnostics, etc) into HDFS, analyzing it to provide highly accurate MPG and vehicle range prediction, as well as providing…

SpringOne2GX 2015 replay: Spring Data REST - Data Meets Hypermedia + Security

News | Pieter Humphrey | February 09, 2016 | ...

Recorded at SpringOne2GX 2015 Presenters: Greg Turnquist & Roy Clarkson Data / Integration Track Slides:

Check out Spring Data REST, a library than can rapidly bridge your data access layer to a RESTful interface using hypermedia. See how you can build the backend for your startup rapidly using top notch practices. We will then look at Spring-A-Gram, a sample application built with Spring Data REST and secured by Spring Security. Snap pictures from your laptop or smartphone and upload them to the server…

SpringOne2GX 2015 replay: HTTP/2 for the Web developer

News | Pieter Humphrey | February 09, 2016 | ...

Recorded at SpringOne2GX 2015 Presenter: Brian Clozel Web / Javascript Track Slides:

The HTTP/2 spec is here - clients are servers are racing to implement it, while browser support is increasing everyday... The JVM world is already working on it in the Servlet 4.0 and JDK9 specs. But we developers, are still trying to understand the implications of it.

Should we reconsider the way we build JavaScript applications and optimize them for front-end performance? Will our server application have new roles and abilities?

In this…

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