This Week In Spring - April 30th, 2013

Engineering | Josh Long | April 30, 2013 | ...

Welcome to another installment of This Week in Spring! We've got a lot to cover this week, as usual, so let's get to it. Did you miss last week's Pivotal public launch? Catch the replay and learn about GE's investment in the new entity! Pivotal's mission is about bringing consumer-grade software to the enterprise -- where open source technology like Spring, Groovy, Grails, RabbitMQ, Redis, and Cloud Foundry, are already widely adopted. Check out the new Pivotal website, under the Community link (top right) for some other open source initiatives that might surprise you!

  1. Oliver Gierke has announced Spring HATEOAS 0.5, which contains lots of new features!
  2. Spring Security lead Rob Winch has announced that Spring Security 3.1.4 is now available. This is a maintenance release with a number of bug fixes including OSGi support for Spring 3.2.
  3. Spring Data ninja Oliver Gierke also (boy that guy gets around!) tweeted a look at the Spring Data roadmap: introducing Spring Data "Babbage."
  4. Spring Data Arora SR1 released this week (named for Sanjeev Arora). As an aside, you have probably noticed that the names of the various Spring Data release trains are adapted from various influential names in computer science. The new release is named for Charles Babbage.
  5. Adam Shook and Dr. Mark Pollack's webinar, Hadoop, Pivotal HD and Spring for Apache Hadoop, is now available online.
  6. Gil Tene, of Azul Systems, gave an amazing talk at SpringOne2GX 2012 called Understanding Java Garbage Collection and what you can do about it, which is now online.
  7. New SpringOne2GX replays now available in HD on YouTube: Building for Performance with Spring Integration & Spring Batch, Case Study: Provisioning a Multi-Site In-Memory Database
  8. James Watters shared a video he'd discovered on setting up Cloud Foundry and BOSH. It's pretty epic and worth a watch if you want to get a handle on BOSH.
  9. What people write blog posts about sometimes surprises me. The Javarevisted blog has a nice post introducing Spring's (fairly internal, albeit stable) org.springframework.util.StringUtils class, with examples on how to convert collections to delimited strings. I think this is perhaps too much information on the subject, but I love the enthusiasm!
  10. RabbitMQ developer-advocate Alvaro Videla has put together a post on how to unit-test RabbitMQ from PHPUnit. This approach is pretty cool, though I wonder how well it would play in Java and jUnit with concurrent test suite execution. Either way, this is a nice way to unit test my favorite message queue!
  11. Do you need a Spring Integration adapter? Have you checked out the Spring Integration extensions repository? This repository simply collects adapters that move faster than the Spring Integration core, or that are still being polished. It's a great place to find solutions to various problems. Heck, even the pull requests are chock full of useful stuff - I see an MQTT adapter in there by the amazing Gary Russell!
  12. Check out this amazing post on @gopivotal blog called 800,000 Messages/Minute: How Nokia’s HERE Uses #RabbitMQ to Make Real-time Traffic Maps over on the @gopivotal blog. It introduces the Nokia HERE architecture that builds on Spring AMQP and RabbitMQ.

Introducing Spring XD

Engineering | Mark Fisher | April 23, 2013 | ...

Today we are officially kicking off a new initiative called Spring XD whose theme is "tackling Big Data complexity"1.

The Spring Data team has been incredibly busy over the past few years, not only providing support for NoSQL datastores but also simplifying the development experience with Hadoop. With the creation of the Spring for Apache Hadoop project, we made it easier to get started developing Hadoop applications by providing a rich configuration model and a consistent programming model across Hadoop ecosystem projects such as Hive and Pig. As Spring users would expect, one can:

  1. Configure and run MapReduce jobs as container managed objects.
  2. Use template helper classes for HDFS, HBase, Pig and Hive to remove boilerplate code from your applications.


This Week in Spring - April 23rd, 2013

Engineering | Josh Long | April 23, 2013 | ...

Welcome back to another installment of This Week in Spring! Here in San Francisco, we're experiencing the first fits of life and beautiful weather typical of spring time. Fitting, too, as things are busy-as-can-be in the Pivotal open source communities - including Cloud Foundry and SpringSource - as we march towards the Pivotal Initiative launch on April 24th. See you then!

Without further ado, let's get into this week's roundup:

  1. Have you guys seen the amazing Java configuration support in Spring Batch 2.2.0.RC1? The code I've just linked you to demonstrates a complete working Spring Batch job that reads in a .csv file and then writes the records to a data source, all of which are configured in the class, entirely in Java. This demonstrates the @EnableBatchProcessing annotation in 2.2.0. Check it out!
  2. New SpringOne2GX replays now available in HD on YouTube: Implementing Domain Driven Design with Spring and vFabric, Batch Processing and Integration on Cloud Foundry and a bonus session, Understanding Java Garbage Collection and what you can do about it.
  3. The FuzzyDB open source project tweeted that they'd released a new version of FuzzyDB with Spring Data bindings aligned with the Spring Data Arora release train. Congratulations, guys!
  4. Have you had a chance to play with Thymeleaf, the HTML5 and Spring MVC-friendly templating engine? If you'd like to learn even more, you'll probably like this presentation called Thymeleaf, Will it Blend?
  5. David Welch put together a quick demo of Spring Data Mongo and made the work available. He tweets that he went from working demo in 8 minutes with 4 classes and a pom.xml. Nice work man!
  6. Check out Ramnivas Laddad's awesome talk CloudFoundry Architecture talk at SpringOne2GX up live on the SpringSource YouTube channel SpringSourceDev.
  7. Spring HATEOAS lead Oliver Gierke tweeted a link to this post, "How I Explained REST to my wife", which would seem at first to be just one person's attempt at explaining a fairly deep technology concept to a person who didn't have the same technical background, but quickly turns into a (I think really insightful) look at the applicability of REST. Check out Spring HATEOAS if you want to take your REST-fu to the next level.
  8. I'm personally enamored of the new Java configuration APIs, both those recently released and those currently available in preview releases. I showed a very simple example of the Spring Batch API above. I also took a moment last week to write about the powerful Spring Social Java configuration API soon to be available in the 1.1.0.M2 release.
  9. You can have Spring perform a sort of pre-condition check by using the @Required annotation to insist at runtime that a property be satisfied with a non-null value, or Spring will abort the construction of the object. This helps avoid any silent NullPointerExceptions. This JavaBeat post does a nice job explaining how to use @Required.
  10. The how to do in java blog has a nice posting on how to create a custom UserDetailsService in Spring Security 3.
  11. The JavaCodeGeeks blog has a nice post on how to create RESTful services with Spring MVC.
  12. Brian's Java Blog has a nice post on using Spring AOP with both annotation and XML-centric configuration options.

Spring Tool Suite and Groovy/Grails Tool Suite 3.3.0.M1 released

Releases | Martin Lippert | April 23, 2013 | ...

Dear Spring Community,

I am happy to announce the first milestone release 3.3.0.M1 of the Spring Tool Suite (STS) and the Groovy/Grails Tool Suite (GGTS).

Highlights from this milestone build include:

  • Spring IDE: improved support for JavaConfig-driven Spring projects
  • Groovy-Eclipse: now supports customizable editor templates
  • Groovy-Eclipse: navigation and hovers in binary (compiled) groovy files
  • Grails-IDE: preliminary support for current builds of Grails 2.3

Both tool suites ship on top of the latest Eclipse Juno SR2 release. For optimal performance and stability we still recommend the distribution that is based on Eclipse 3.8.2.

The second milestone 3.3.0.M2 build is scheduled for early June 2013, followed by the 3.3.0 release in early July 2013 - shortly after the Eclipse Kepler release.

To download the distributions, please go visit:

Detailed new and noteworthy notes can be found here: STS/GGTS 3.3.0.M1 New & Noteworthy.


This Week in Spring - April 16th, 2013

Engineering | Josh Long | April 16, 2013 | ...

Welcome to another installment of This Week in Spring! It's been an exciting week for Spring at Pivotal, which you can hear more about at the re-scheduled Pivotal launch event on April 24th.

  1. In case you are reading too fast, Pivotal has re-scheduled the launch event to April 24th. Register here!
  2. Arjen Poutsma has announced Spring Web Services 2.1.3.RELEASE. The new release mainly consists of bug fixes, for the full details check out the changelog.
  3. Don't miss the upcoming Webinar with Donald Miner and Mark Pollack discussing Pivotal HD and Spring Hadoop, a good introductory webinar for those that are Pivotal HD-curious.
  4. New SpringOne2GX replays now available in HD on YouTube: Cloud Foundry Architecture, Effective Design Patterns in NewSQL
  5. There was a great post on Reddit the other day that explains the difference between REST and SOAP in terms of Martin Lawrence. This has nothing to do with Spring, but was droll enough that it's worth sharing.
      Spring, of course, has an amazing REST stack and I highly encourage people to check out how to build consolidated, streamlined REST services with Spring! Moving on... :) 
  6. James Rossiter has a good post on how to use a Spring InitBinder to Resolve Type Mismatch and bind Exceptions in POST from Spring MVC to Controller Actions.
  7. @olivergierke brings up a great point on Twitter: how much code does it take to add the JTA 1.2 JSR javax.transaction.Transactional annotation to Spring? Almost nothing! Most of the code here is just unit tests. Otherwise, this is just a dead simple mapping of the JTA annotation to Spring's already supported engine, which also currently supports the native Spring @Transactional and @javax.ejb.TransactionAttribute annotation.
  8. Are you looking into Gradle and want to get started with Spring, quickly? Giancarlo Frison has put together a nice post with a bootstrap Gradle build that can be used with Spring applications.
  9. Eugen Paraschiv has put together a nice post on how to use RestTemplate to do HTTP BASIC authentication.
  10. Spring has long supported a utility class, called the org.springframework.util.StopWatch, which can be used to measure the execution of method invocations. The Javarevisited blog has a
      <a href="">nice post on how to use the <CODE>StopWatch</code> class</a>.
  11. This post is fairly old, but I just stumbled upon it and thought it was a well thought out presentation introducing Aspect Oriented Programming (AOP) in Spring.

This Week in Spring - April 9th, 2013

Engineering | Josh Long | April 09, 2013 | ...

Welcome to another installment of This Week in Spring! As usual, we've got a lot to cover, so let's get to it!

  1. SpringSource CTO Adrian Colyer outlines the direction and momentum of SpringSource and the Spring projects under the Pivotal Initiative, a new company spun out of EMC comprised of - among other things - SpringSource, Cloud Foundry, and GreenPlum. This is definitely worth a read if you want to understand Spring's - ahem - Pivotal role in this new initiative!
    <LI> Spring Batch lead Michael Minella has <A href=""> announced that Spring Batch 2.2.0.RC1 is now available</a>.
    	The new release includes preliminary support for Spring Data, Java configuration support, non-identifying job parameters 
    	and numerous fixes and polishes. This release is amazing, and definitely worth a look. I, personally, <EM>love</EM> the Java configuration API that's
    	been surfaced. You don't need to write another…

SpringOne 2GX 2012 Replays: Virtualizing and Tuning Large Scale Java Applications, From Spring and Java to Spring and Akka

News | Pieter Humphrey | April 09, 2013 | ...

Virtualizing and Tuning Large Scale Java Applications

This session shares many of the production proven methods of running Java on vSphere. Covering how to size JVMs, and VMs for large scale deployments. The session will have a special section on GC tuning and show how a wide range of JVMs can be tuned using a GC recipe developed over the past 15 years of actual field experience in tuning JVMs.

Three key trends and associated tuning techniques are discussed in this session. The key trends are: Consolidation, Elasticity and Flexibility, and Performance

Consolidation Many of our customers find that their middleware deployments have proliferated and are becoming an administrative challenge associated with higher costs. We see a trend across customers who look to virtualization as a way of reducing the number of server instances. At the same time, customers are taking the consolidation opportunity to rationalize the number of middleware components needed to service a particular load. Middleware components most commonly run within a Java Virtual Machine (JVM) with an observed scale of 100 to 1000s of JVM instances and provide many opportunities for JVM instance consolidation. Hence, middleware virtualization provides an opportunity to consolidate twice – once to consolidate server instances, and, secondly, to consolidate JVM instances. This trend is far-reaching, because every IT shop on the planet is considering the cost savings of consolidation. One customer in the hospitality sector went through the process of consolidating their server footprint and at the same time consolidated many smaller JVMs that were less than 1GB heap. They consolidated many of these smaller 1GB JVMs into 2 categories, those that were 4GB, and others that were 6GB. They performed the consolidation in such manner that the net total amount of RAM available to the application was equal to the original amount of RAM, but with fewer JVM instances. They did all of this while improving performance and maintaining good SLAs. They also reduced the cost of administration considerably due to the reduced number of JVM instances they had to manage, and refined environment that helped easily achieve SLA.
Another customer, in the insurance industry, was able to achieve the same as the above customer, but additionally was able to over-commit CPU in development and QA environments in order to save on third party software license costs. On the other hand, sometimes we come across customers that have a legitimate business requirement to maintain one JVM for an application, and/or one JVM per a line of business. In these cases, you cannot really consolidate the JVM instances, as that would cause intermixing of the lifecycle of one application from one line of business with another. However, while such customers don’t benefit from eliminating additional JVM instances through JVM consolidation, they do benefit from more fully utilizing the available compute resource on the server hardware, that otherwise would have been underutilized in a non virtualized environment

Elasticity and Flexibility It is increasingly common to find applications with seasonal demands. For example, many of our customers run various marketing campaigns that drive seasonal traffic towards their application. With VMware, you can handle this kind of traffic burst, by automatically provisioning new virtual machines and middleware components when needed, and then automatically tear down these VMs when the load subsides. In addition, the ability to change updating/patching hardware without causing outage is paramount for middleware that supports the cloud era scale and uptime. VMware VMotion gives you the ability to move VMs around without needing to stop applicators and or the VM. This flexibility alone makes virtualization of middleware worthwhile when managing large-scale middleware deployments. One customer in the financial space, handling millions of transactions per day, used VMotion quite often to schedule their hardware upgrades without any time downtime. What otherwise would be a costly scheduled downtime to their business.

Performance Customers often report improved middleware platform performance when virtualizing. Performance improvements are partly due to the updated hardware that customers will typically refresh during a virtualization project. There is also some performance improvement due to the robust VMware hypervisor. A recent customer that reported a great level of performance provided the following testimony

“With our OrderExpress project we upgraded our Middleware Services, Commerce, Portal, WCM, Service Layer, DB2 Database; migrated from AIX to Linux; virtualized on VMware; moved the application into a three-tier DMZ; increased our transactions by over 150 percent; and added significant new capabilities that greatly improved the customer experience. Changing such a wide range of technology components at once was a huge challenge. However using VMware vSphere and additional architectural changes we were successful in improving performance by over 300 percent; lowered costs in the millions; improved security, availability, and scalability; and how we plan to continue evolving this application to maintain greater than 30 percent yearly growth.”

– Jeff Battisti, Senior Enterprise Architect at Cardinal Health

In this session, I will show some actual JVM and VM sizes for middleware components both small and large JVMs. Will also detail out GC tuning recipe that I have developed over the years,that has been shown to handle JVM heap sizes form 4GB to 88GB+, and higher. Of course the introduction of in-memory databases has driven the trend to have these larger JVMs and hence why we will discuss what is the best way to tune the JVM, VM, and the hardware platform they are deployed on.

I see the sizing question as the most commonly asked question with our customer base,and as a result I plan to focus on it during the session.

About the speaker

Emad Benjamin

Emad Benjamin

Emad Benjamin has been in the IT industry for the past twenty years. He graduated with a Bachelor of Electrical Engineering from the University of Wollongong. Earlier in his career, he was a C++ software engineer, then in 1997, he switched to programming with Java, and has been focusing on Java ever since. For the past seven years, his focus has been Java on VMware vSphere, vFabric GemFire and SQLFire. Emad has been at VMware since 2005, and is the author of the Enterprise Java Applications Architecture on VMware book. Emad has previously presented at VMworld, SpringOne, and Open World on the subject of Java virtualization.

More About Emad »


From Spring + Java to Spring + Akka - A Journey of Discovery

Actor based concurrency model is a paradigm shift. What is paradigm shift?

A change in the basic assumptions, or paradigms, within the ruling theory of science. A paradigm shift makes simple ideas hard to grok. Even though Actor model is a simple and revolutionary idea it becomes hard for programmers to see practical benefits and usage. Similarly, the Scala programming language brings a lot to the table in simplifying actor-based design, but comes with a new style of coding. One possible solution to this problem is to evaluate the new paradigm in terms of old paradigm. In this presentation we will take a working Spring based web application and gradually implement it using actors and Scala. We will be skeptical and suspicious of new ideas but at the same time we will be open minded. We will learn about actor based concurrency model using the knowledge of spring. At the same time, we'll learn best practices behind Actors, Scala and combining these with the Spring Framework.

About the speakers

Nilanjan Raychaudhuri

Nilanjan Raychaudhuri

Nilanjan is a consultant and trainer for Typesafe. He started his professional career as a software developer in 2000 using object oriented programming languages. Nilanjan has previously worked with IBM, ThoughtWorks and LivingSocial where he gained a lot of experience in managing and developing software solutions in Java/JEE, Ruby, Groovy and also in Scala. He is zealous about programming in Scala ever since he got introduced to this beautiful language. Currently he spends his spare time working on the scala-webmachine open source project (restful resource framework). In the past Nilanjan worked on other open source projects and libraries. At Typesafe he is mainly teaching and designing Scala and Play courses and helping customers to adopt these technologies. Nilanjan enjoys sharing his experience via talks at various conferences. He is also the author of the "Scala in Action" book.

More About Nilanjan »

Josh Suereth

Josh Suereth is a Senior Software Engineer at Typesafe and the author of "Scala In Depth.” He has been a Scala enthusiast ever since he came to know this beautiful language in 2007. He started his professional career as a software developer in 2004, cutting his teeth with C++, STL, and Boost. Around the same time, Java fever was spreading and his interest was migrating to web-hosted distributed Java-delivered solutions to aide health departments discover the outbreaks of disease - everything from EJB to Hibernate/Spring and even some Applets. He introduced Scala into his company code base first in 2007, and soon after he was infected by Scala fever, contributing to the Scala IDE, maven-Scala-plugin, and Scala itself. In 2009, he began writing the book "Scala In Depth" which provides practical support for using Scala in everyday applications. Today, Josh is the author of several open source Scala projects, including the Scala automated resource management library, the PGP sbt plugin, as well as contributing to key components in the Scala ecosystem, like the maven-Scala-plugin. His current work at Typesafe Inc. has him doing anything from building MSIs to profiling performance issues. Josh regularly shares his expertise in articles and talks.

More About Josh »

Spring Batch 2.2.0 RC1 is now available

Releases | Michael Minella | April 09, 2013 | ...

We are pleased to announce that Spring Batch 2.2.0.RC1 is now available via the SpringSource Milestone repository. Spring Batch Home | Source on GitHub | Reference Documentation

Support for Spring Data

Spring Data is a collection of projects intended to make it easier to develop Spring-powered applications that use new data access technologies such as non-relational databases. Based on a model of exposing Repository objects, Spring Data allows applications to access data in a simple and consistent way across many new platforms. Spring Batch 2.2.0.RC1 now provides ItemReader and ItemWriter implementations for a number of the data stores supported by Spring Data including MongoDB, Neo4j, and Gemfire (write only). In addition, Spring Batch 2.2.0.RC1 now has a RepositoryItemReader and RepositoryItemWriter that will read and write items from custom Spring Data Repository implementations.

Java Configuration

With this release, Spring Batch 2.2.0.RC1 now supports Java based job definitions. Building a job definition with java configuration is now available via the new @EnableBatchProcessing annotation and a collection of builders that allow you to construct jobs, steps, flows, splits, etc. By using the @EnableBatchProcessing annotation the following features are enabled:
  • Creation of StepScope - Allowing the configuration of beans via @Scope("step")
  • @Autowired - A JobRepository, JobLauncher, JobRegistry, PlatformTransactionManager, JobBuilderFactory and StepBuilderFactory are all available to be autowired into your context.

Non-identifying Job Parameters

Spring Batch 2.2.0.RC1 now supports the use of job parameters that do not contribute to the generation of a JobInstance's identity. As part of this update, the JobParameters is no longer associated with a JobInstance and is now associated with a JobExecution. To support this change, the job repository schema has updated and a migration script has been provided. You can read the details about the migration script in the Getting Started Guide.

Other Improvements and Bug Fixes

With the release of Spring Batch 2.2.0.RC1, a host of other improvements and bug fixes have been added. The complete list of updates for this release can be found in the changelog for this revision.


Spring Batch Home | Source on GitHub | Reference Documentation

Spring Mobile 1.1.0.M3 Released

Releases | Roy Clarkson | April 05, 2013 | ...

Dear Spring Community,

We are happy to announce the release of Spring Mobile 1.1.0.M3!

Spring Mobile provides extensions to Spring MVC that aid in the development of cross-platform mobile web applications.

This release adds simpler configuration when using a custom domain strategy with SiteSwitcherHandlerInterceptor. Kindle Fire devices are now detected as tablet or mobile depending on which mode they are in. Additionally, several issues have been resolved in this release. This release is built and tested against Spring Framework 3.2.2. See the changelog and reference manual for more information. Many thanks to the community for their continued feedback and support in improving Spring Mobile.

To retrieve the software, download the release distribution, or add the maven artifacts to your project. Sample apps are available at

If you are building a mobile web app, we encourage you try out Spring Mobile 1.1.0.M3 and collaborate with us on the next iteration of the project.

Spring and Open Source at the Pivotal Initiative

Engineering | Adrian Colyer | April 03, 2013 | ...

By now you’ve probably heard about Pivotal. I’d like to take a moment here to explain what this means for Spring, and to tell you about some of our plans for 2013.

In case you missed it, here’s the essential background on Pivotal: Led by Paul Maritz, the initiative unites key people and projects from across EMC and VMware to bring “consumer grade” technology to the enterprise. We see a new generation of applications emerging that are powered by new data fabrics and will interact with and serve customers in the context of who they are, where they are, and what they are doing in the moment…

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