Interesting to see Spring covered in a mass media publication like eWeek. One of the things that makes me a bit uncomfortable about the article is the way it was written - it sounded like SpringSource "owns" the Spring portfolio. I've always been kind of curious about this - how many non-i21/SpringSource committers are there across the Spring products?
There was some discussion about this in this post. You should be able to get a list of developers from JIRA.
Well, I looked in JIRA, but I can't find a way to tell who's who as a standard user. Looking at the bug assignments in 'Spring Framework', it seems that all the assignees are SpringSource employees (I believe):
If you look at some of the other projects though, I'm not sure everyone is an employee. There is also a list on the sourceforge page.
Couldn't SpringSource provide some kind of official numbers? What do I know who is or was employee from this list. But to be honest I also thought up to now that Spring is - despite open source - a closed-community project. I never saw somebody becoming a committer. But maybe this process is just not public.
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That is my impression, too. Maybe I'll try writing to Rod or Juergen and see what they say.