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Spring 2.5 Arrives for Winter


Renamed support company backs annotation configuration

By Alex Handy
November 29, 2007 — 
Winter may be just around the corner, but Spring has just arrived.

This seasonal 2.5 update to the popular enterprise Java application framework, released Nov. 19, brings annotations into the forefront of configuration. Behind the framework, its parent company has rebranded itself: On the same date, Interface21 became SpringSource.

Johnson, the creator of the Spring framework and CEO and founder of the now-renamed SpringSource, said that the changes in Spring 2.5 allow for more flexibility of configuration.

“Spring traditionally has focused on allowing users to configure their code through externalizing configuration in XML files. This means you can change the configuration of your application without recompilation,” said Johnson. That was fine back in the days of Java 1.4, said Johnson, but with the release of Java 1.5, annotations popped onto the scene. “There are times when configuration doesn't change so often, where it's appropriate to place the configuration along with the code.”

For these types of situations, Spring 2.5 allows users to simply include the configuration information in the code through annotations.

This gives Spring 2.5 users “the ability to mix and match configurations from different sources: some in XML files, some in source level annotations. The Spring container will merge all those sources of configuration. Spring will automatically scan your class path, and analyze classes to find annotations of interest,” said Johnson.

Johnson pointed out that Spring 2.5 is still compatible with all previous versions of the framework. It requires Java 1.4 or higher, and with the release of 2.5, is available as OSGi bundles. That means an application can be updated to Spring 2.5 without any downtime at all, provided OSGi is in the application server being used.

SpringSource offers classes, support and consulting services for Spring developers. The new name is accompanied by a new URL as well: www.springsource.com.


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