My Stuff

2010 Conferences

OSGi DevCon @ JAX London

February 23 - Keynote titled OSGi in the Enterprise: Agility, Modularity, and Architecture’s Paradox


March 22 - 25 - Tutorial on Modular Architecture

Über Conf

June 14 - 17 - Sessions titled Turtles and Architecture and Patterns of Modular Architecture


July 26 - 30 - Two sessions on rich mobile applications and one on agile development. Half day tutorial on software process improvement.

Tweets @ Twitter

re: #apple event "We sold more iPads than any PC manufacturer sold of their entire PC line." 2012-09-12

re: #Apple Event ""Our notebooks now rank #1 in the US in Market share in the last three months." 2012-09-12

Right on. I just won a Best Buy drawing worth $1000. Either that or I won a shiny new virus by clicking the link. Hmm...what to do. 2012-08-29

The #osgi alliance response ( to the @mreinhold #jigsaw announcement ( 2012-08-29

Good Q&A with @mreinhold on project #jigsaw. Modularity will change the way we design and run apps! 2012-08-28

LinkedIn Profile

The opinions expressed on this site are my own, and not necessarily those of my employer.

JarAnalyzer on Spring OSGi

Filed Under Architecture & Design, Java, Metrics, OSGi, Platforms |  

I took the liberty of running JarAnalyzer on the OSGi bundles deployed as part of Spring 2.5.6. These are the JAR files found in the /dist/modules directory. Click the image at right to reveal the relationships between JAR files.

It’s interesting to see the dependency relationships and layering of the framework. Note that there are no cycles. I have always felt a significant advantage of Spring is the way development teams can incrementally adopt the framework. Start using core for basic dependency injection and move up the stack to JDBC and declarative transactions, ORM integration, and integration with your favorite web framework. It’s the flexible architecture of Spring that allows this. I’m guessing that when the Spring team went about modularizing the framework around OSGi, the architectural flexibility already embodied in previous versions of Spring made their job easier.

For those of you who want the more detailed information, you can view the JarAnalyzer html report for Spring 2.5.6 showing a variety of metrics related to design quality.


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