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 …

Recorded at SpringOne2GX 2015 Presenters: Baruch Sadogursky & Phil Webb Core Spring Track Slides: http://www.slideshare.net/SpringCentral/behind-the-oss-curtain-how-we-manage-spring

How is the open source you use published actually managed? What techniques and tools do successful open source projects use? How are open source projects able to lever the community that they build? This talk will take you behind the scenes of the Spring Framework to show you how we manage code, issues and releases. We'll talk about the tools that we use, how we keep code clean and consistent, and how we use…

Recorded at SpringOne2GX Presenters: Stephané Nicoll & Brian Clozel Web / Javascript Track Slides: http://www.slideshare.net/SpringCentral/spring-boot-for-the-web-tier-53204645

Only 2 years after its inception, Spring Boot is already very popular amongst Spring developers. If you’re familiar with Spring MVC, you may wonder how Spring Boot can improve your web development experience and how its internals work.

First we’ll go over the basics of a REST service powered by Boot. We’ll then gradually add more features that are typical to modern web applications. Along the way, we’ll see how Boot…

Recorded at SpringOne2GX 2015 Presenter: Christian Tzolov Big Data Track Slides: http://www.slideshare.net/SpringCentral/federated-queries-with-hawq-sql-on-hadoop-and-beyond-53208753

In the space of Big Data, Pivotal offers two powerful data processing tools namely HAWQ and GemFire. HAWQ is a scalable OLAP SQL-on-Hadoop system, while GemFire is OLTP like, in-memory data grid and event processing system. This presentation will show different integration approaches that allow integration and data exchange between HAWQ and GemFire. The practical experience in applying Spring Boot and Spring XD…

Recorded At SpringOne2GX 2015 Presenters: Kris De Volder & Martin Lippert Core Spring Track Slides: http://www.slideshare.net/SpringCentral/developing-cloud-native-applications-with-the-spring-tool-suite

In this session we will demonstrate how to work effectively with Spring projects in Eclipse and the Spring Tool Suite (STS). We will demo all the latest enhancements in the tools including features like much smarter property file editing. We will also demonstrate new features in the Eclipse 4.5 (Mars) platform. Going beyond basic application development we will look at how to build and work…

Guest Speaker: Micah Silverman, Java Developer Evangelist, Stormpath

Join Stormpath Java Developer Evangelist Micah Silverman for a technical overview of the common pain points with Java authentication. We'll cover how to solve them with Stormpath in a Spring Boot application, and demonstrate how to quickly add a complete user management system to your Spring Boot app.

By the end of this webinar, you’ll be on your way to a fully functioning Spring Boot app backed by Stormpath.

Topics Covered:

Authentication Pain Points in Java Stormpath, Spring Boot, and Your Architecture Demo: Auth in Spring Boot, with these features: A complete user registration and login system Pre-built login screens Password reset workflows Group-based authorization Advanced user features: API authentication, Single Sign-On, social login, and more Technical Q&A

Thursday, Feb 18th, 2016 3:00PM London GMT Register

Thursday, Feb 18th, 2016 10:00AM PST (San Francisco GMT-08:00) Register

Entering Reactive Streams Era

Reactor 2.0 development started by the end of 2014, around the same time as Reactive Streams. We were keen on joining the effort and early adopt a backpressure protocol to mitigate our main message-passing limitation: bounded capacity. We delivered in Reactor 2.0 the first attempt to make Reactive Streams implementations of RingBuffer-based schedulers and derived an increasingly popular reactive pattern: Reactive Extensions.

Meanwhile, Reactive Streams started getting traction and an entire ecosystem of libraries discussed this transition. The regular concern ? Implementing Reactive Streams semantics is all but an easy task. We observed an increasing need for a reactive foundation to solve message-passing and implement common streaming operators. We therefore created a dedicated project space for Reactor Core and started a focused effort with Spring Framework team…

Guest Speaker: Geertjan Wielenga, Principal Product Manager, Oracle

NetBeans IDE is the official IDE of the Java platform. Focused on rapid out-of-the-box development of all kinds of Java applications, NetBeans is comprehensive and easy to use. In particular, its free and open source tooling for end-to-end development is much admired. Over recent years, many developers have added NetBeans to their toolbox because of its intuitive and powerful integration with Maven and Gradle. During this session you will see how NetBeans is well suited for setting up and developing applications that make use of Spring Boot. You will also learn about the many new features that have been added in NetBeans IDE 8.0 and 8.1, helping you working quickly and effectively with Java and Maven in the context of Spring Boot. By the end of this session, you'll have a better grasp of Spring Boot, as well as a thorough understanding of the range of features that NetBeans provides for working with it!

Thursday, Feb 25th, 2016 3:00PM London GMT Register

Thursday, Feb 25th, 2016 10:00AM PST (San Francisco GMT-08:00) Register

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…