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…

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!…

I received an email recently that asked about how to forward control from a wait-state in an Activiti (which is an open-source BPMN2 workflow engine from Alfresco) to a Spring Integration flow and then resume execution of the Activiti workflow process upon completion of some work in Spring Integration.

To really appreciate why this is useful goal, we need some background.

What is Activiti

Activiti is a business process engine. It's basically a directed graph of nodes (states) that model the states of a complex business process. It keeps track of the progression of work described in a business…

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: This is a summary of XSS without HTML: Client-Side Template Injection with AngularJS. Previously the citation was in the middle of the document and difficult to find. The goal of the summary is to present the exploit and a fix without all the nuances, not to claim the work as my own.

Introduction

AngularJS is a popular JavaScript framework that allows embedding expressions within double curly braces. For example, the expression 1+2={{1+2}} will render as 1+2=3.

This means that if the server echos out user input that contains double curly braces, the user can perform a XSS exploit using…

Welcome to another installation of This Week in Spring! Here we are, already staring at the second month of the year and, boy!, are things getting exciting! I'm about to start hitting the road again and I'd love to talk to you and your organization if you're near any of the following places and events in February:

• Microchg Conf
• JFokus
• Devnexus
• Hatford, Connecticut (around 17/2/2016)
• Confoo
• Shanghai (around 26/2/2016)

Anyway, without further ado, let's get into it!

• our own Paul Chapman chimes in on the updated courseware available for developers who want to learn about Spring
• there are (finally!) new guides available on using Spring Cloud: routing and filtering using the Netflix Zuul microproxy library and Spring Cloud, centralized configuration with the Spring Cloud Config Server, the circuit breaker design pattern, and service registration and discovery using Spring Cloud's DiscoveryClient abstraction and Spring Cloud's integration of Netflix Eureka. Stay tuned, we've got more in the pipeline!
• Spring Boot lead Phil Webb just announced the release of 1.3.2…