This week in Spring: April 26th, 2011

Engineering | Josh Long | April 26, 2011 | ...

Another week, another great allotment of new content that - as usual - draws from the community and from SpringSource. The enthusiasm for CloudFoundry continues unabated this week, with some interesting content in this week's roundup. For more content on CloudFoundry, you might consult the and sites. In particular, the slides from the Cloud user group held the day after the announcement are available here.

  1. Oliver Gierke has posted a blog on Advanced Spring Data JPA which explains how to use the features in the Spring Data JPA project that elevate the art of JPA programming, like the integration of the QueryDSL library. This post - and the library - speak to the ongoing, first-class support in the Spring frameworks for all data access technologies, be they RDBMS, NoSQL, or anything else.
  2. Peter Ledbrook, Grails Developer Advocate, has recently expanded on his original blog on using Grails and CloudFoundry.

    This blog provides a detailed look at using Grails' GORM support with the various data stores available on CloudFoundry. Check it out!

  3. Alex Popescu's MyNoSQL portal, MyNoSQL, has some interesting comments about the NoSQL options supported in CloudFoundry. He comments that "From a storage perspective, Cloud Foundry is encouraging polyglot persistence right from the start offering access to a relational database (MySQL), a super-fast smart key-value store (Redis), and a popular document database (MongoDB)."
    This post - and indeed the entire site - is a very valuable resource for CloudFoundry users that want to exploit the NoSQL options, but don't understand the use cases yet. There's a lot of good content on both MongoDB and Redis, for example.
  4. Mark Thomas, Apache Tomcat 7 release manager and engineer, has written up a post on Apache Tomcat 7's session fixation protection security feature on the website. Keeping on top of the latest Tomcat security features is important if you are, like the majority of developers, using Tomcat (or hardened, ops-friendly derivatives like SpringSource's tcServer) as a production server for your Java (and often Spring) applications. Additionally, Tomcat's bundled with several application servers. Either way, knowing about Tomcat's industry-leading features can only help.
  5. Costin Leau has announced the Spring GemFire 1.0.1 release, which incorporates bug fixes and promotes stability.
  6. <li>Just a reminder to our European community members, the S2G Forum Series will be held in <a href="">Amsterdam (May 26th)</a> and <a href="">London (May 31st)</a>. There will be tons of great sessions about Spring, Groovy and Grails as well as talks focused specifically on CloudFoundry, Tomcat and Gemfire so be sure to <a href…

Advanced Spring Data JPA - Specifications and Querydsl

Engineering | Oliver Drotbohm | April 26, 2011 | ...

In my last blog post I introduced the basic feature set of Spring Data JPA. In this post I'd like to dive into some more features and how they can help you simplify data access layer implementation even further. The Spring Data repository abstraction consists of an interface based programming model, some factory classes and a Spring namespace to easily configure the infrastructure. A typical repository interface looks something like this:

public interface CustomerRepository extends JpaRepository<Customer, Long> {

  Customer findByEmailAddress(String emailAddress);


Eventing Data with RabbitMQ and Riak

Engineering | Jon Brisbin | April 21, 2011 | ...

As new applications take advantage of the scalability benefits of message brokers like RabbitMQ and cloud-scale datastores like Riak, it's inevitable that the two should become fast friends (the kind who actually talk to each other in person rather than the kind whose only contact is through Facebook).

So many of the applications we find ourselves writing these days have these two functions in the same application. Very often we want to update data as the result of a message or send a message as the result of updated data. Two new utilities facilitating RabbitMQ and Riak integration allow you…

Deeper into Grails & Cloud Foundry

Engineering | Peter Ledbrook | April 21, 2011 | ...

In my previous post, I showed you how easy it is to deploy a Grails application to Cloud Foundry using the corresponding plugin. Hopefully that whetted your appetite and you are ready to look at a more complex Grails application that demonstrates the power of the GORM plugins and stretches the Cloud Foundry services. If you don't have a Cloud Foundry account yet, please be patient. The response to the announcement has been phenomenal so it is going to take some time to work through the backlog of requests.


Simple Twitter clones have become almost the standard for sample Grails applications, so it's no surprise that another version has been developed for Cloud Foundry. You can find the code on GitHub along with the other Cloud Foundry samples and you can also test out an instance of the application

This week in Spring: April 19th, 2011

Engineering | Josh Long | April 19, 2011 | ...

Welcome back to This Week in Spring. The enthusiasm for last week's Cloud Foundry announcement was outstanding and appears to be getting stronger! People all over the world have flooded the SpringSource and CloudFoundry forums, downloads pages and source repositories. What unprecedented activity!

Many of the different, powerful technologies coming out of SpringSource recently have been leading up to the Cloud Foundry release so I invite you to review some of the exciting stuff that's come out in the last few months that have become even more interesting in terms of the cloud and Cloud Foundry: Spring Gemfire, Spring AMQP, Spring 3.1 profiles, Spring 3.1 caching abstraction, Spring Data, Spring Integration support for NoSQL, and Spring Hadoop, vFabric Hyperic, vFabric RabbitMQ, and vFabric GemFire. Of course, for all of these technologies - the first, and best, tooling and development experience continues to be SpringSource Tool Suite and Spring Roo.

Ok, onward to this week's review. So much exciting stuff, so little time!

  1. Christian Dupuis has just written up a detailed blog on using STS to deploy to Cloud Foundry.
  2.  <li><A href="">Spring Roo 1.1.3</a>, featuring 
     Cloud Foundry support, shell enhancements, and improved support for composite primary keys - among other things - has been released. 
    	 <li> DZone has published a <a href="">Spring Roo RefCard</a> by the Spring Roo team's <a href="">Stefan Schmidt.</a> This RefCard's a fantastic way to get going quickly with Spring Roo. Spring Roo, it could be argued, is ideally suited to the RefCard…

Spring Data Graph 1.0 with Neo4j support released today

Engineering | Michael Hunger | April 18, 2011 | ...

This announcement post is a guest contribution by the developers of the Neo4j team that worked closely with SpringSource's Spring Data team to provide the Spring Data Graph integration library.

Spring Data Graph Logo

For a friendly introduction to Spring Data Graph we’re hosting a free webinar with VMware presented by Neo Technology’s CEO Emil Eifrem on April 20 at two convenient times for the Americas and Europe. [Update: The webinar video is now available on youtube in the SpringSourceDev channel.]

Now that Spring is in the air, the Neo4j and Spring Data teams are happy that almost a year’s worth of work has produced our 1.0 version of the Spring Data Graph library. The Spring Data project aims to bring the convenient programming model of the Spring Framework to NOSQL databases. Spring Data Graph supports graph databases

Using Cloud Foundry from STS

Engineering | Christian Dupuis | April 13, 2011 | ...

By now you probably heard about Cloud Foundry, the open PaaS from VMware that was announced yesterday; if not make sure to check out the recording of the webcast. Eventually you have already read earlier blog posts introducing the Spring support for Cloud Foundry, the add-on for Spring Roo and the Grails plug-in.

With this post I’d like to introduce the Eclipse-based support for Cloud Foundry that lets you manage your cloud deployments, including configuration of Services and service bindings, application scaling, access to file resources and much more.

Installing the Cloud Foundry for Eclipse and STS

There are three options to install the Cloud Foundry plugin into SpringSource Tool Suite (STS) and plain Eclipse. I will go through those options step-by-step in order to help you get started quickly.

Installing through the STS Extension Install

Probably the easiest way to get started with the Cloud Foundry plugin is by installing it into a pre-installed copy of STS. You should have at least version 2.5.1.RELEASE installed; 2.6.1.SR1 is better. STS for various supported operating systems can be found on the download page.

Within STS select “Help > Dashboard…

One-step deployment with Grails and Cloud Foundry

Engineering | Peter Ledbrook | April 12, 2011 | ...

A couple of years back, the co-founder of a startup spoke at the London Groovy and Grails User Group. I remember vividly how he said he dreamed of deploying a Grails application with "just one click". With the announcement of the new Cloud Foundry service, his dream is nearly a reality for all Grails users. Now you not only get simple and rapid development with Grails, but also simple and rapid deployment to a cloud hosting provider.

So how do Grails and Cloud Foundry work together? As long time Grails users would expect, we have a plugin for that! To demonstrate how it works I'm going to walk you through deploying a sample application, Pet Clinic, to Cloud Foundry. It's a simple application and you can see it in action on Cloud Foundry

Roo + Cloud Foundry = Productivity in the Cloud

Engineering | James Tyrrell | April 12, 2011 | ...

Today marks an important day for developers, with the public beta release of Cloud Foundry, VMware’s open source Platform as a Service offering. Rod Johnson’s blog contains a lot of background details about this exciting announcement, and Mark Fisher’s post offers a first look at the service and how easily applications can move between a local environment and the cloud. As both Rod and Mark highlight today’s announcement is about enhancing and ensuring developer productivity.

In support of this new service and platform we are pleased to announce that we have integrated Cloud Foundry support into Spring Roo - Spring’s rapid application development tool for Java developers. Now you can take Roo’s productivity to the cloud and you don’t even have to leave the shell! There are dozens of commands to make it easy to work with Cloud Foundry, and of course you can build a new application and deploy it to Cloud Foundry in just a few minutes. Once you’ve logged in, it’s as simple as using the new “cloud foundry deploy” command and…

Cloud Foundry for Spring Developers

Engineering | Mark Fisher | April 12, 2011 | ...

By now, many of you have probably seen the Cloud Foundry webinar and Rod's blog from earlier today. I'd like to provide a quick follow-up that features a "hello-spring" sample application deployed in the cloud. Thanks to Cloud Foundry, there's practically no learning curve at all.

Before we get started, let's consider three goals that have driven Spring from day one:

  1. focus on simplicity and productivity to make developers lives easier
  2. support innovative technologies in a consistent way
  3. ensure portability of applications across deployment environments

Then, consider those same three goals in relation to Cloud Foundry:

  1. Simplicity and Productivity: Deploying a Spring application to the cloud is as simple as dragging and dropping within SpringSource Tool Suite, and even when building an application to run in the cloud, developers can take advantage of the productivity gains enabled by Roo and Grails exactly as they normally would.
  2. Consistent Innovation: Projects like Spring Social and Spring Data embrace innovative technologies such as Twitter and non-relational data stores that are increasingly popular for cloud-based applications, and they do so in ways that are consistent with the existing Spring platform. Cloud Foundry provides services to support such applications. RabbitMQ will be available as a cloud service soon, so the same applies to applications that rely on RabbitMQ for messaging via Spring AMQP and Spring Integration.
  3. Portability: The cloud is first and foremost a new deployment environment, and yet it's easy to create an application that can run in and out of the cloud without even swapping configuration files.

With those goals in mind, we've designed a sample application that provides an introduction to Cloud Foundry for Spring developers. This is the first of many…

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