Welcome back to another installment of This Week in Spring. We have a lot of great content this week, as usual!

1. Rossen Stoyanchev has put up another blog in his series on Spring MVC 3.2 Preview. This latest installment introduces a Spring MVC chat example.
2. Oliver Gierke has announced the 1.1.0 GA version of Spring Data JPA. Spring Data JPA makes it very simple to build JPA-based repositories, saving you from the tedious boiler plate code. This new release includes new keywords for query generation (LessThanEqual, GreaterThanEqual, Before, After, StartsWith, EndsWith, and Contains), a handy PersistenceUnitPostProcessor to scan for JPA entities (to be used in Spring versions before 3.1), support for native queries in @Query, and support for declarative locking.
3. Jonathan Brisbin announced the 1.0.0.M2 release of Spring Data REST. Spring Data REST let's you easily export your Spring repository objects as RESTful endpoints. The new release includes support for invoking query methods of Repository interfaces, support for JSR 303 and Spring Validator validations, and improved support for Spring ApplicationEvents that are emitted before and after each save or delete, and annotation-based configuration.
4. Oleg Zhurakousky has announced the first milestone release of Spring Integration 2.2. This release includes dependency upgrades, JPA support, and support for "publisher confirms and returns," which are newly supported in Spring AMQP.
5. Gary Russell has announced version 1.1.0 of Spring AMQP that includes support for the RabbitMQ 2.8.x client, which in turn supports mirrored queues, broker failover, publisher confirms, returns, federated exchanges, and much more.
6. Matt Vickery has a great post introducing the Spring Integration splitter-aggregator pattern.
7. Willie Wheeler has a great post up on his custom configuration management database (a CMDB). The post details the project, and then talks about his use of Spring Data's repositories in rebuilding the backend for CMDB. Nice post, Willie!
8. Doug Haber put together a wonderful post on handling paging using Spring Data and the REST support in Spring 3.1.
9. Blogger panbhatt has a detailed post on using Spring MVC's REST support to solve a particular set of problems he was having.
10. Blogger OBSERWATORZY described his particular thought process when trying to consume a RESTful service, and wondering if Spring provided an answer (of course it did!). Read on for his resolution.
11. Vishal Biyani has put together a nice introduction to getting started with Spring Roo and Cloud Foundry.
12. The RabbitMQ blog has an amazing article introducing queueing theory (with an introduction to throughput, latency and bandwidth.
13. JAXEnter has a nice roundup of some of the news releases described in this very post, including the Spring AMQP and Spring Data JPA's GAs.

Welcome back to another installment of This week in Spring!. We've got a lot to cover this week, as usual. So, onward!

1. Rossen Stoyanchev has just released part two and three of his blog series introducing Spring MVC 3.2's new features. In the first installment, Rossen introduces how to make a Spring MVC @Controller asynchronous. In the second post, Rossen introduces how to add long polling to an existing web application. Long polling is useful in any number of scenarios where you want to simulate server-side push with client-side applications.

<LI>  The video for <a href= "http://blog.springsource.org/author/ozhurakousky/">Oleg Zhurakousky</A>'s followup webinar introducing <a href ="http://www.springsource.org/node/3550">More Practical Tips and Tricks with Spring Integration</A> has just been posted. Check it out! </LI> 
 <LI> <A href ="http://blog.springsource.org/author/rclarkson/">Roy Clarkson</A>  just announced that <a href = "http://www.springsource.org/spring-mobile/news/1.0.0-released">Spring Mobile 1.0.0 has  been released</A>!  </LI>



<LI>  SpringSource and Cloud Foundry rockstar  <a  href  ="http://blog.springsource…

You've no doubt read Jennifer Hickey's amazing blog posts introducing Cloud Foundry workers, their application in setting up Ruby Resque background jobs, and today's post introducing the Spring support.

Key Takeaways for Spring Developers

1. You need to update your version of vmc with gem update vmc.
2. Cloud Foundry workers let you run public static void main jobs. That is, a Cloud Foundry worker is basically a process, lower level than a web application, which maps naturally to many so-called back-office jobs.
3. You need to provide the command that Cloud Foundry will run. You could provide the java incantation you'd like it to use, but it's far simpler to ship a shell script, and have Cloud Foundry run that shell script for you, instead. The command you provide should employ $JAVA_OPTS, which Cloud Foundry has already provided to ensure consistent memory usage and JVM settings.
4. There are various ways to automate the creation of a Cloud Foundry deployable application. If you're using Maven, then the org.codehaus.mojo:appassembler-maven-plugin plugin will help you create a startup script and package your .jars for easy deployment, as well as specifying an entry point class.
5. Everything else is basically the same. When you do vmc push on a Java .jar project, Cloud Foundry will ask you whether the application is a standalone application. Confirm, and it'll walk you through the setup from there.

So, let's look at a few common architectures and arrangements that are easier and more natural with Cloud Foundry workers. We'll look at these patterns in terms of the Spring framework and two surrounding projects, Spring Integration and Spring Batch, both of which thrive in, and outside of, web applications. As we'll see, both of these frameworks support decoupling and improved composability. We'll disconnect what happens from when it happens, and we'll disconnect what happens from where it happens, both in the name of freeing up capacity on the front end.

I've got a Schedule to Keep!

One common question I get is: How do I do job scheduling on Cloud Foundry? Cloud Foundry supports Spring applications, and Spring of course has always supported enterprise grade scheduling abstractions like Quartz and Spring 3.0's @Scheduled annotation. @Scheduled is really nice because it is super easy to add into an existing application. In the simplest case, you add @EnableScheduling to your Java configuration or <task:annotation-driven/> to your XML, and then use the @Scheduled annotation in your code. This is a very natural thing to do in an enterprise application - perhaps you have an analytics or reporting process that needs to run? Some long running batch process? I've put together an example that demonstrates using @Scheduled to run a Spring Batch Job. The Spring Batch job itself is a worker thread that works with a web service whose poor SLA make it unfit for realtime use. It's safer, and cleaner, to handle the work in Spring Batch, where its recovery and retry capabilities pick up the slack of any network outages, network latency, etc. I'll refer you to the code example for most of the details, we'll just look at the the entry point and then look at deploying the application to Cloud Foundry.

					    
// set to every 10s for testing.
@Scheduled(fixedRate = 10 * 1000)
public void runNightlyStockPriceRecorder() throws Throwable {
	JobParameters params = new JobParametersBuilder()
		.addDate("date", new Date())
		.toJobParameters();
	JobExecution jobExecution = jobLauncher.run(job, params);
	BatchStatus batchStatus = jobExecution.getStatus();
	while (batchStatus.isRunning()) {
		logger.info("Still running...");
		Thread.sleep(1000);
	}
	logger.info(String.format("Exit status: %s", jobExecution.getExitStatus().getExitCode()));
	JobInstance jobInstance = jobExecution.getJobInstance…

Welcome to another installment of This Week in Spring! I'm writing the back of the room during Adrian Colyer's amazing keynote at SpringOne On The Road - London event.

1. Did you guys miss Oleg Zhurakousky's webinar, Practical Tips and Tricks with Spring Integration? Have no fear, the video is available online.

   Also, be sure to check out part 2, this Wednesday, May 3rd for both Europe and North America!

   	</LI>
   	<LI> <a href = "http://blog.springsource.org/author/rclarkson/">Roy Clarkson</A> has announced the <a href = "http://www.springsource.org/spring-mobile/news/1.0.0.rc2-released">latest release of Spring Mobile</A>.  
   		 The release has several enhancements including more refined resolution, and improved site switching behavior. 
   		
   		</LI> 
   		<LI>  <a href = "http://blog.springsource.org/author/jbrisbin/">Jonathan Brisbin</A> just announced <a href="http://blog.springsource.org/author…

Welcome back to another installment of This Week in Spring! As I compile this, I'm eagerly waiting for Costin Leau to begin his talk on NOSQL with Spring here in sunny, and beautiful Kiev, Ukraine, the first stop in the European leg of the Cloud Foundry Open Tour. The turnout for this event's been staggering! If you're reading this, then you've already missed out on the chance to attend the Kiev event, but be sure to register for the upcoming Moscow and London events.

1. In this SpringOne 2GX 2011 session, Mark Fisher and Thomas Risberg transform a monolithic enterprise application by changing its relational DB with a NoSQL one, introducing modularity, adding polyglot support and incorporating message queuing and event driven request processing using common enterprise integration patterns.
2. Did you guys notice that the final edition of the excellent Spring Roo in Action has just been published?

       This book is, as Ben Alex (Spring Roo project founder) put it, "an insightful and comprehensive treatment." I (personally) can't recommend it enough. Ken Rimple and Srini Penchikala, as long time readers of this roundup will know, are frequent Spring community bloggers and 
   

   routinely provide amazing content on all things Spring.
   

			 <LI>  
		Blogger Billy Sj&ouml;berg on DZone has a great post on how <a href = "http://www.dzone.com/links/r/bridging_between_jms_and_rabbitmq_amqp_using_spri.html">to bridge JMS and RabbitMQ</A>. 
		 This example uses <a href = "http://www.springsource…

What a great week! The Cloud Foundry Open Tour's well under way, having just finished the Asian and US legs of the tour. Now, onward to Europe! (If you're in Europe, now's the time to secure your spot!)

Before we continue on to the bevy of the latest and greatest content, I wanted to remind you guys to check out Spring Integration ninja Oleg Zhurakousky's upcoming webinar, Practical Tips for Spring Integration. There is, as usual, one event for North America, and one for Europe

1. Gunnar Hillert's put together a blog introducing a feature that's received a lot of attention in SpringSource Tool Suite: easy-to-use templates for creating Spring Integration projects. Nice job, Gunnar! Also, check out Gunnar's accompanying video Create Spring Integration Projects with STS on the SpringSource YouTube channel.
2. Michael Isvy has put together a great blog explaining a few of the things you should be aware of when upgrading to Spring 3.1. Handy!

 <LI> Spring Integration 2.1.1 has been released! This is the first maintenance release of 2.1.x branch and contains the usual things like bug fixes and improvements related to AMQP, Gemfire, Mongo and Redis modules which were first introduced in Spring Integration 2.1.0. All together 56 issues were resolved with this release. 
	 For more, consult <a href = "http://www.springsource.org/node/3520">the release announcement</A>.</LI>
		
<LI>  Gabriel Axel talks about the <a href = "http://www.gabiaxel.com/2012/04/spring-social-google-first-milestone-is.html">first milestone of Spring Social…

Welcome to another Installment of This Week in Spring The Cloud Foundry Open Tour is well underway, and have been thus far very good events to attract community.

There are still some (well, there were yesterday!) early bird spots in the upcoming shows in <a href = "http://opentour.cloudfoundry.com/2012/austin">Austin</A>, <a href = "http://opentour.cloudfoundry.com/2012/washington">Washington D.C.</a>, <a href = "http://opentour.cloudfoundry.com/2012/kiev">Kiev</A>, <a href = "http://opentour.cloudfoundry.com/2012/moscow">Moscow</A>, and <a href  = "http://opentour.cloudfoundry.com/2012/london">London</A>, so book now. 

1. Some of the wonderful content from the Spring I/O conference is now available online! The conference, held in Spain in February of this year, is conducted in both Spanish and English, so there's a lot to like no matter which language you speak. Adrian Colyer's keynote session is super, once you get past the audio problems at the beginning. I couldn't find a SpringIO-specific hash tag, but you can pick them out of the other videos pretty easily by scrolling down. Stay tuned, there should be even more content posted, soon.

 <LI> Tobias Fiohre (who  seemingly lives  <EM>only</Em> to please us, the lucky developers in the  Spring community!)  has put up…

Welcome to another installation of This Week in Spring. As usual, we have a lot to cover. As this post goes up, the Cloud Foundry Open Tour is underway in Beijing, and coming to a city near you, soon. This show's a very unique opportunity to learn more about Cloud Foundry and Spring from the experts - don't miss out, register today.

1. Spring web dude Rossen Stoyanchev announced that Spring Web Flow 2.3.1 has been released. This is a maintenance release featuring an upgrade to Spring 3.1.1, and JavaServer Faces 2.1.7 along with a number of bug fixes.
2. SpringSource Tool Suite lead Martin Lippert announced the release of the Cloud Foundry Integration for Eclipse 1.0. This release brings a complete, cohesive Cloud Foundry integration for all Eclipse distributions, including the SpringSource Tool Suite.
3. Martin also announced the release of SpringSource Tool Suite release, 2.9.1, featuring new features and bug fixes.

<LI>    <a href = "http://www.springone2gx.com/conference/speaker/mark_fisher">Mark Fisher</A> and <a href = "http://www.springone2gx.com/conference/speaker/thomas_risberg">Thomas Risberg</A>'s epic talk from <a href = "http://www.springone2gx.com">SpringOne 2GX 2011</A>  - <EM><A href = "http://www.infoq.com/presentations/Architecture-Choices-for-Scalable-Cloud-Apps">Architecture Choices for Scalable Cloud Apps</A></EM> -  that introduces how to build scalable architectures in the cloud using technologies like Spring Integration and Cloud Foundry is now up on InfoQ. 
	  </LI>
	

4. Maciej Walkowiak has a blog that introduces how to use Spring 3.1 profiles in conjunction with some custom Tomcat configuration to activate Spring profiles without changing the deployed binary.
5. Michal Jastak has put together a wonderful post introducing how to use Spring MVC 3.1's support for flash attributes.
6. Tobias Flohre is at it again, this time with two posts on Spring Batch. The first post introduces the basics of transactions in Spring Batch, and the second post introduces some of the finer points of restarting cursor-based readers and writers.

    </LI> 
   

7. Artur Mkrtchyan has a great post introducing both how to install Redis (a fast, highly optimized data-structure server) and how to use Spring Data Redis (part of the Spring Data umbrella project that facilitates access to the wide varieties of so-called NoSQL and big-data stores) to build Spring applications that talk to Redis.
…

Spring Integration committer and teacher Oleg Zhurakousky demoes performing transaction management, error handling, asynchronous processing, advanced aggregator configuration,  and much more using Spring Integration and the Enterprise Integration Patterns. This talk is a chance to stand over the shoulder of a master as he tackles some frequently asked questions about Spring Integration and demonstrates the solutions in code.    

Welcome to another installment of This Week in Spring. We've got a lot of good stuff to look at, as usual.

  Since you&#39;re here, though, let&#39;s talk about the <a href="http://blog.cloudfoundry.com/post/13481010905/cloud-foundry-open-tour-2012" target="_blank">Cloud Foundry Open Tour</a>, which is an event bringing the industry&#39;s best talent and speakers on Spring, Cloud Foundry, and much more  to a town near you in America, Asia and Europe.  The full itinerary&#39;s provided on the linked page, but if you&#39;re in (or near) Shanhai, Beijing, Tokyo, London, Moscow, Kiev, San Francisco, Portland, Austin, and Washington D.C., then you should not  miss this event - <a href="http://opentour…