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Spring Framework 2.1 M1 released

Dear Spring Community,

We are pleased to announce that Spring 2.1 M1 has been released.  This is the first milestone release in the Spring 2.1 series, introducing major new features including annotation-based configuration, JCA-based message endpoint management, new "context" and "jms" XML configuration namespaces, and JDK 1.6 and Java EE 5 support.

Spring 2.1 M1 Released

 
See the associated press release for an overview of the major themes of the 2.1 release. Subscribe to the Interface21 Team Blog for discussion and examples of the new features.

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Spring LDAP 1.2 RC1 released

Dear Spring community,


We are pleased to announce the first release candidate of Spring LDAP 1.2, with a number of features and bug fixes. Only the most important are listed here. For a complete listing, please see the changelog.
The release is available for download here.

  • Implemented client-side transaction support for Spring LDAP. See reference documentation for further information (LDAP-29).
  • Changed the exception hierarchy to be an unchecked mirror of the JNDI NamingException hierarchy (LDAP-4).
  • Exceptions thrown by Spring LDAP are now always Serializable, regardless of whether the wrapped NamingException is (which is not always the case) (LDAP-14).
  • Rewrote LdapEncoder.nameDecode() to solve problem with national characters and remove regular expression used in parsing, drastically improving Distinguished Name parsing performance as a bonus (LDAP-30).
  • Upgraded to Spring 2.0.4 internally. Spring 1.2.x is still supported (LDAP-35, LDAP-51).
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Spring Web Flow Bean Scopes and JSF

I’ve recently finished up an interesting issue in Spring Web Flow. This issue (SWF-163) dealt with adding Spring 2.0 bean scoping support for Spring Web Flow’s internal scopes. The implementation isn’t really that interesting (the Scope interface is pretty easy to implement after all), but I wanted to mention exactly how you would use something like this in your application.

Spring 2.0 Scoping

In Spring 1.x, we had the idea of singleton and prototype bean scopes, but the notation was fixed and not especially descriptive with singleton=“[true | false]”. So in Spring 2.0, this notation was removed from the XSD style of configuration and now you see a notation that is more clear with scope=“[singleton | prototype | …]”. Spring itself adds three more bean scopes; request, session, and globalSession which are related to web applications.

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Spring Framework 2.0.5 released

Dear Spring Community,

We are pleased to announce that Spring 2.0.5 has been released.  This is is a bugfix and enhancement release in the Spring 2.0 series, addressing all issues reported since 2.0.4 and introducing further concurrency improvements. We recommend to upgrade to Spring 2.0.5 from all previous 2.0.x releases.

Spring 2.0 Released

 

Please see the changelog and JIRA roadmap for all the details of the 63 issues addressed in this release.

Juergen Hoeller
Lead, Spring Framework Development
Interface21 - http://www.interface21.com

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Spring Batch

Introduction

I’ve been working hard with a couple of clients on a new product called Spring Batch. The aim is to provide tools and applications to support bulk processing in an enterprise environment. Spring Batch is part of the Spring Portfolio with an initial release in the Spring 2.1 release train.

The original impetus to build some prototype code actually came independently from a number of Interface21 clients. This provides some useful additional detail and some constraints on the implementation so that it can be applied to the real-world problems posed by the clients. I hope that this article will stimulate some more interest and provide feedback on the general approach.

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Power Combination: SCA, OSGi, and Spring

No, that’s not my headline, it’s actually the title of a white paper recently published by Open SOA collaboration. To quote from the news announcement accompanying the whitepaper:

“Based upon user feedback, the OSOA Collaboration are publishing a white paper highlighting the powerful combination of the SCA, Spring and OSGi technologies aimed to help Developers simplify the creation and composition of services critical to building applications based on an SOA approach.”

partners

The white paper provides a short overview of SCA, OSGi and Spring, and then describes how they can be used together. Quoting from the summary:

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Querying and Downloading from Amazon S3

In a previous post, I described how we use a custom ANT task to upload nightly snapshots from the ANT based projects in the Spring portfolio. In this post I’ll describe how we use Amazon S3 to generate pages for the snapshots from each project and allow users to download the snapshots.

As I mentioned in the previous post, S3 is primarily used as a REST-ful service. This means that while I used Java for the upload portion, I was free to use other languages for the download portion. I chose to use PHP in this case because it was already available on the server I was working with, and was the path of least resistance.

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Uploading to Amazon S3 using a custom ANT task

One of the interesting side effects of a solid CI structure is that when things are running reliably, new problems start to crop up. Shortly after Spring’s CI system started running smoothly, our occasional space and bandwidth issues on static.springframework.org became more pronounced. Colin Sampaleanu had done research earlier on how to alleviate some of these problems and had settled on Amazon S3.

Amazon S3 is part of the Amazon Web Services umbrella and provides an incredibly cheap online file storage service. What does ‘incredibly cheap’ mean? Well, from the website, it appears that 1 GB*month of storage costs US$0.15 and 1 GB of bandwidth costs US$0.20. Add to that, a high-bandwidth transparent mirroring service, and S3 becomes very appealing for storing our nightly snapshots. On a tangent, Amazon actually uses the exact same infrastructure internally, so you know that there is a team of admins guaranteeing their five 9’s promise.

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The Essence of Spring

This happened in Atlanta last week while I was in a Barnes & Noble bookstore. I circled around to the computer section and began scanning titles. With my head tilted I overheard a conversation about a job. I wasn’t actively listening but I knew one side was pitching a job while the other was inquiring about it.

A couple of minutes later it was just me and the guy who was looking for talent. I was sure he would start speaking. Soon after he said ‘so you’re in J2EE?’ and so the conversation began. He asked me about my work. He didn’t know about Interface21 but upon hearing it’s the company behind Spring his face lit. He said he hadn’t tried Spring yet and then added he was currently using Struts.

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XPath Support in Spring Web Services

Following up on my post on WS-DuckTyping, I thought it would be interesting to show what support Spring Web Services offers for XPath. Some of these features are available right now, but most will be part of the RC1 release we will release later this month. Throughout this post I will be using the contacts xml file defined in item 35 of Effective XML, by Rusty Harold.

XPathExpression

One of the options that has been available for quite a while is the XPathExpression. This is an abstraction over compiled XPath expressions, such as the Java 5 XPathExpression, and Jaxen XPath.

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