Welcome to another installment of This Week in Spring! This week I'm in London and Amsterdam (for the epic GOTO Amsterdam conference as well as the JDriven meetup and the Dutch Spring User Group). We've got a lot to cover, as usual, so let's get to it!

• Spring framework 4.3, packed with all sorts of niceties, is now available. This release provides all sorts of cool updates to various libraries (Hibernate ORM, Jackson, Netty, Undertow, Tomcat) and supports two features I'm quite excited about: auto-injection in constructors of Spring managed components whose parameters are unambiguously resolved by other types in the application context and the ability to inject types into a @Configuration-class's constructor.
• Marius Bogoevici just announced a critical update to Spring Cloud Stream, 1.0.2.RELEASE, is now available for immediate use
• the good Dr. David Syer posted the second in a series of posts looking at the reactive programming landscape…

In this article we continue the series on Reactive Programming, and we concentrate on explaining some concepts through actual code samples. The end result should be that you understand a bit better what makes Reactive different, and what makes it functional. The examples here are quite abstract, but they give you a way to think about the APIs and the programming style, and start to get a feel for how it is different. We will see the elements of Reactive, and learn how to control the flow of data, and process in background threads if necessary.

Setting Up a Project

We will use the Reactor libraries to illustrate the points we need to make. The code could just as easily be written with other tools. If you want to play with the code and see it working without having to copy-paste anything, there are working samples with tests in Github…

Welcome to another installment of This Week in Spring! It's already June! Where. Does. The. Time. GO?? This week I'm in Chicago, IL, for the Chicago Coder Conference, Boston and New Hampshire for customer visits, London, England for Devoxx UK and Talin, Estonia for Geekout EE. If you're around be sure to say hi! Now then, we've got a lot to cover this week so let's get to it!

• Spring Cloud Services ninja Scott Frederick just announced the Spring Cloud Cloud Foundry Service Broker, which is a nice framework for building service brokers for the Cloud Foundry platform
• Spring Boot and Spring Cloud co-founder (the good) Dr. Dave Syer just put published the first post in a series on the reactive programming landscape
• Spring Integration ninja Artem Bilan just announced that Spring Integration Kafka 2.0.0.RC1 is now available
• not one to rest on his laurels, Artem also announced the Spring for Apache Kafka 1.0. RC1
• Spring Cloud Streams lead Marius Bogoevici has just announced Spring Cloud Stream 1.0.1.RELEASE…

Reactive Programming is interesting (again) and there is a lot of noise about it at the moment, not all of which is very easy to understand for an outsider and simple enterprise Java developer, such as the author. This article (the first in a series) might help to clarify your understanding of what the fuss is about. The approach is as concrete as possible, and there is no mention of "denotational semantics". If you are looking for a more academic approach and loads of code samples in Haskell, the internet is full of them, but you probably don’t want to be here.

Reactive Programming is often…

Greetings Spring community,

There has been a lot of buzz in the past six months over Spring 5 and Reactive Streams support. I personally witnessed the number of questions Rossen received during his Reactive Spring MVC talk at DevNexus back in March. And his reactive talk at Spring I/O conference more recently was VERY popular to attenders.

Based on the huge leaps and bounds Project Reactor has made in the past two years, we are taking two of our guides down:

• Creating an Asynchronous, Event-Driven Application with Reactor

• Uploading pictures with Reactor

Those guides are over two years old…

Welcome to another installment of This Week in Spring! This last week was a bit crazy, though after a long restful weekend there's a lot of intersting content to invigorate us for the week ahead. I'll be speaking at a meetup on the 16th June, for those near Amsterdam that'd care to join us! As usual, we've got a lot to cover so let's get into it.

• Remember, the goal of microservices is, ultimately, to go faster and to get to production. To do continuous delivery. A huge part of that has to be moving code from integration and testing to production, automatically, and ideally with no downtime. I'd recommend this excellent blog by Spring Cloud team member Marcin Grzejszczak on zero-dotime deployments with a database. This is an excellent resource!
• speaking of micrservices and Spring, there's a neat introduction to doing microservices "Spring Boot way" (is there any other way? :D) on DZone by Santosh Singh
• want to learn more about Kotlin and Spring? Want to see why large organizations (like Netflix) are using Spring Cloud along with Kotlin? check our Spring team member Sébastien Deleuze's spring-kotlin…

This article will explain in depth how to tackle issues related to database compatibility and the deployment process. We will present what can happen with your production applications if you try to perform such a deployment unprepared. We will then walk through the steps in the lifecycle of an application that are necessary to have zero downtime. The result of our operations will be applying a backward incompatible database change in a backward compatible way.

If you want to work through the code samples below, you will find everything you need in GitHub.

Introduction

Zero downtime deployment

What is this mythical zero downtime deployment? You can say that your application is deployed that way if you can successfully introduce a new version of your application to production without making the user see that the application went down in the meantime. From the user’s and the company’s point of view it’s the best possible scenario of deployment since new features can be introduced…

Welcome to another installation of This Week in Spring! This week's already off to a crazy start. Sunday evening I returned from Kiev, Ukraine, where I spoke at JEEConf. Yesterday, Monday, I gave a talk with my friend Baruch from JFrog at yesterday's JFrog Swampup conference event in Napa, California. Today I'm off to Denver, Colorado for Gluecon, and then off to GOTO Chicago in Chicago, Illinois and I'll finish out the week in Washington DC for customer visits. I can't wait to see you all along the way!

• I hope you'll register for this upcoming webinar on distributed tracing with the Spring Cloud team's very own Adrian Cole and Marcin Grzejszczak
• Wow! Spring Roo 2.0M2 is packed with lots of cool looking features supporting Spring Boot and removing the older ActiveRecord-style support in favor of proper Spring Data repositories
• I really liked Stormpath founder and CTO Les Hazlewood's post on how they moved their entire backend API to Spring Boot in a matter of three weeks while embracing Spring Boot's autoconfiguration to solve a few problems of their own, like a Samza auto-configuration.
• the Udemy Spring Cloud workshop online looks pretty cool…

Welcome to another installment of This Week in Spring! As I write this, I'm in Chennai, India, en route to Bangalore, India for a day of exciting customer meetings and then I'm off to sunny Barcelona, Spain, for the epic Spring IO event! Then, this Friday, I'm off to Kiev, Ukraine, for JEEConf. If you're around, as always, don't be shy and say hi!. That said, let's get into it!

• The BIG news: Spring Cloud Brixton is now available! Get the bits from the Spring Initializr. If you'll permit a little back-patting, I submit that you might get a good feel for what concerns a technology like Spring Cloud addresses by reading this article I wrote and you'll learn how Spring Boot and Spring Cloud are used in this video. That said, grab the bits and go!
• Spring Cloud Stream 1.0.0 is here, at long last! Spring Cloud stream makes it simple to build collaborating messaging-based microservices.
• Spring Boot co-lead Phil Webb just announced that Spring Boot 1.4.0.M3 is now available, just in time…