We’re pleased to announce the first version of the Apache Ambari plugin for Spring XD.

Ambari is a cluster provisioning tool to install and manage various Apache projects like HDFS, YARN, Zookeeper or Kafka. Ambari has a concept of a stack definition which is used by both Pivotal and Hortonworks. The stack definition is usually made up of components supported by the maintainer.

This Ambari integration adds support for provisioning Spring XD with Pivotal HD 3.0 and Hortonworks HDP 2.2.

Spring XD is not part of the main Ambari distribution for PHD or HDP. However, it is easy to extend an…

On behalf of the Spring Data team, I am happy to announce the first milestone of the Spring Data release train Gosling. The release ships with 164 tickets fixed as well as Spring Data KeyValue joining the Spring Data release train with an initial milestone. The highlights of the release include:

• Spring 4.1 as a new minimum baseline.
• Simplified support for adding custom methods to all repositories throughout the individual modules (see this example).
• Declarative ad-hoc JPA 2.1 fetch graph declarations via @EntityGraph on repository methods.
• Gemfire 8.1 support including multi-index definition operations.
• SpEL expressions in @Query as well as support for $geoIntersects for MongoDB.
• Enhanced ZSET support for Spring Data Redis including ZRANGEBYLEX.
• A Spring Data REST module shipping the HAL browser as well as support for conditional GETs.
• Map-backed repositories (see this example)
• …

Welcome to another installment of This Week in Spring! This week I'm in New York City in advance of QCon NYC next week talking to customers and working with the local Pivotal Labs team. If you're around be sure to say hi and let's talk code.

So, as usual, we've got a lot to cover so let's get to it.

1. Our pal Nicolas Frankel's put together an awesome post on modularizing configuration for integration testing with Spring

• Spring Cloud co-lead Spencer Gibb just announced that Spring Cloud Consul 1.0.0.M1 is now available
• Don't miss Jamie O’Meara's upcoming webinar on continuous integration with Jenkins, Spring and Cloud Foundry
• Check out Phil Dutson's upcoming webinar on moving .jsp and JSTL pages to Thymeleaf
• Spring Integration lead Gary Russell just announced Spring Integration 4.2M1 is now available
• check out the replay of Marten Deinum's awesome talk that looks at how to modernize legacy applications with Spring
• Janne Valkealahti just announced that Spring Statemachine 1.0.0.M2 has been released.
• our pal Eugen Paraschiv did an interesting …

On behalf of the Spring XD team, I am very pleased to announce that the Spring XD 1.2 Release Candidate is now available for download. You can also install using rpm

The 1.2 RC1 release includes bug fixes as well as several new features and enhancements.

• Apache Ambari plugin to automate the deployment of Spring XD to a Hadoop cluster. Read more in the release blog for the plugin.
• A new Analytics tab in the UI that allows you to easily view gauges, counters, field-value counters and aggregate counters.
• Performance improvements for the Kafka Message Bus that places it on par with the performance benchmark applications that ship with Kafka. An upcoming blog will discuss XD performance in more detail
• Improved HA support for the Rabbit Message Bus, XD containers connect to the Rabbit Broker that hosts the queue that is being consumed
• Support for the Sqoop metastore and other …

As Josh mentioned in "This Week in Spring" already, Eugen Paraschiv recently did a noteworthy survey on the adoption of Spring 4 and Java 8 as well as Spring Boot: http://www.baeldung.com/java-8-spring-4-and-spring-boot-adoption

Those are interesting numbers for us. Within the Spring universe, Java 8 adoption seems to be approaching 40%! And in terms of Spring Framework versions, Spring 4 is at 65% already, which I'm really happy to see. Even taking into account that a large part of the corporate use of Spring might not be represented in those numbers, that's a great trend. And Pivotal's…

We are pleased to announce that the first milestone of Spring Integration 4.2 is now available (4.2.0.M1).

This release includes:

• A significant overhaul of the JMX support in the framework, providing performance and other improvements when JMX is enabled
• A preview of STOMP client-side channel adapters based on the support in Spring Framework 4.2
• A mongodb metadata store
• @SecuredChannel annotation
• Conditional Pollers - the polling interval can be adjusted dynamically, based on the results of (or before executing) the current poll
• Cross Origin Resource Sharing (CORS) support in the http inbound gateway
• Many internal improvements
…

CI on the Cloud with Jenkins, Spring and Cloud Foundry

Speaker: Jamie O’Meara, Pivotal

This presentation will highlight an integrated development process that involves Spring code built with CloudBees Jenkins Enterprise and deployed to CloudFoundry. A software lifecycle of continuous delivery from source code control (Git) to Jenkins build (Maven and Gradle) to live deployment on a Cloud Foundry instance will be shown. We will demo using Jenkins to do a blue/green application deployment. With a Cloud Foundry blue/green Jenkins deployment, you can push a new version of the application and have a software router add that to an existing version of the application's route. The two versions are then load-balanced, allowing for testing of the new version and easy replacement or fall-back to the existing version. Developers can run builds on private and public clouds with deploy to either/both Jenkins running on a PaaS and integrated into the PaaS. We will run a hands-on demo and show the beauty and simplicity of an integrated build pipeline with Spring, Jenkins and Cloud Foundry.

Tuesday, June 23rd, 2015 3:00PM GMT (London GMT +01:00) Register

Tuesday, June 23rd, 2015 10:00AM PDT (San Francisco GMT-07:00) Register

Speaker: Phil Dutson, ICON Heath and Fitness

Thymeleaf is a fantastic template engine that can help you create sites faster and get code shipped. There exists however a problem, using th e template engine requires a mind-shift in how to get "normal" tasks accomplished. This leaves many developers in the lurch and frustrated. In this talk I will cover the common pitfalls that developers can avoid and give examples on how to solve the common problems encountered when switching from the venerable JSTL to Thymeleaf.

Tuesday, June 30th, 2015 3:00PM GMT (London GMT +01:00) Register

Tuesday, June 30th, 2015 10:00AM PDT (San Francisco GMT-07:00) Register

Speaker: Marten Deinum

Slides: https://speakerdeck.com/mdeinum/improving-legacy-applications-with-spring

Source Code: https://github.com/mdeinum/legacy-app

Spring has been around since the release of “J2EE Design and Development” in 2002. Spring and Java have evolved quite a bit since that time. In those years a lot of applications have been developed. All those "legacy" applications that are around have proven their value and that is why they lasted. In this session we will explore how we can improve our legacy applications by doing some refactoring or redesign (component based development) but also by introducing (newer) Spring IO technologies.

Learn about about Spring Framework at http://projects.spring.io/spring-framework