I am pleased to announce that the spring-kafka (Spring for Apache Kafka) first milestone is now available (1.0.0.M1).

The existing spring-integration-kafka extension project - currently at version 1.3.0.RELEASE supports Kafka 0.8.x.x and is used in Spring XD (Kafka MessageBus) and Spring Cloud Stream (Kafka Binder).

This new project (spring-kafka) breaks out the core components into a separate project. It is based on the new 0.9.0.x pure Java Kafka clients.

spring-kafka brings the familiar Spring programming model to Apache Kafka for any Spring user, not just those using Spring Integration. An upcoming spring-integration-kafka release will be a complete rewrite, utilizing the spring-kafka…

Welcome to another installment of This Week in Spring! This week I'm in Bruhl, Germany for the amazing JavaLand show, then it's off to Scotland to visit a large customer, and then it's off to Romania for Voxxed Days Bucharest. If you're in any of those places, I'd love to connect!

• Spring ninja Stephane Nicoll introduces some of the niceties in Spring framework 4.3
• Do not miss Micah Silverman's upcoming webinar introducing the amazing Stormpath and Spring/Spring Boot-based integration and Auto-configuration. Stormpath is an epic identity provider as-a-service. It's ideal for cloud-based applications.
• Spring IO Platform lead Andy Wilkinson just announced Spring IO Platform 2.0.3
• From SpringOne2GX 2015, Integration lead Gary Russell shows us how RabbitMQ powers Spring XD
• Thomas Risberg, also from SpringOne2GX 2015, shows us how simpler Hadoop workflows, and distribution portability make raw Hadoop much simpler for Spring developers. …

Spring Framework 4.3.RC1 is around the corner and brings nice core container refinements which we are going to explore in this post...

Implicit constructor injection for single-constructor scenarios

Consider the following service class:

@Service
public class FooService {

    private final FooRepository repository;

    @Autowired
    public FooService(FooRepository repository) {
        this.repository = repository
    }
}

Quite a common use case but if you forget the @Autowired annotation on the constructor, the container will throw an exception looking for a default constructor, unless you explicitly indicate autowire mode 'constructor' in your bean definition setup (e.g. in an XML <bean>…

Welcome to another installment of This Week in Spring! This week, I'm in Shenzhen, China and Zurich, Switzerland for Voxxed Days Zurich. It's going to be a busy week indeed though I sure hope to see you there! Anyway, we've got a lot to cover this week so let's get to it!

• Spring Boot ninja Stéphane Nicoll has just announced Spring Boot 1.4.0M1 with excellent couchbase support
• Spring Session lead Rob Winch, never resting on his laurels, just announced Spring Session 1.1.0
• Also not resting on his laurels, Stéphane just announced Spring Framework 4.2.5, chock full 'o bug fixes and updates
• Spring XD lead Mark Pollack has just announced that Spring XD 1.3.1 is now GA, along with Spring Flo for XD 1.0.1 GA
• Martin Lippert, the lead developer on Spring Tool Suite, has added better support for both Spring Boot and Cloud Foundry, as well as picking up the latest Eclipse Mars distro, in …

Welcome to another installment of This Week in Spring! We're already staring down the last weeks of February!

• Spring Data lead Oliver Gierke has just announced Spring Data Gosling SR4 containing 45 bugfixes. Get it while it's hot!
• Want to learn more about Spring Data Gosling? Check out this replay of Spring Data lead Oliver Gierke's introduction too the new bits
• the first milestone of Spring Integration 4.3, the last in the 4.x series, has arrived! Lots of small new features to tide you over before Spring framework 5 and the reactive support there become the baseline for Spring integration 5
• Let's hear it for women in tech! Ludwine Probst & Ilayaperumal Gopinathan bring you this SpringOne2GX 2015 replay: …

We are pleased to announce the availability of the first milestone of the 1.6 version of Spring AMQP.

Some highlights of this release:

• A new jar spring-rabbit-test containing a test harness to help with testing @RabbitListener methods; see the testing chapter.

• Multiple @RabbitListener annotations on a method (when using Java 8) and the @RabbitListeners annotation (for pre-Java 8), each allowing the same method to be the listener method for multiple listener containers.

• Full support for the Delayed Message Exchange RabbitMQ plugin.

• An AsyncRabbitTemplate returning ListenableFuture<?> for request/reply messaging.

• An option to publish ApplicationEvents when listener containers go idle.

…

Welcome to another installment of This Week in Spring! It's been a busy week for all of us on the Spring team, as you're about to see! I've just finished my presentation at the epic DevNexus show and now I'm off to visit customers in Hartford and Los Angeles before making my way to the epic ConFoo conference in Montreal, Canada. If you're in the area, be sure to ping me and say hi!

We've got a lot to cover, so let's get to it!

• Reactor project lead Stephane Maldini just announced Reactor 2.5: A Second Generation Reactive Foundation for the JVM. This is a huge part of our continued efforts to better support reactive workloads with Spring.
• We've added a new language, Kotlin, to the Spring Initializr! To learn more check out this great post by Sebastien Deleuze on Developing Spring Boot applications with Kotlin
• Spring Integration and Spring AMQP lead Gary Russell's just announced Spring AMQP 1.6.0 Milestone 1 (and 1.5.4) Available
• Spring REST Docs lead Andy Wilkinson's just announced Spring REST Docs 1.1.0.M1
• last week, Spring Data Couchbase 2.0 went GA, and this week I'm pleased to share a guest post from project lead Simon Baslé introducing …

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…