[jboss-dev] Shared component-matrix

[Paul Gier]

I think the reason we moved it back into AS was because of the circular 
dependencies.  So if EJB3 uses version 5.1 of the component matrix and the 
component matrix points to version 1.0 GA of EJB3, which one gets released 
first?  Also, the component matrix doesn't work well as a snapshot, because if 
you make a groupId or componentId change it breaks the build.

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=132452

But I think it could still work even if separated from the app server.  But 
we'll have to release it pretty often and probably only use snapshot versions of 
it locally.

Maven won't download all the dependencies as long as we keep them in 
<dependencyManagement> like they are now.  Maven will only download the 
dependencies listed in <dependencies> and all the trasitive deps in the tree.



Dimitris Andreadis wrote:
> A very practical problem is if you move component-matrix out of AS, you 
> need to tag a new version of it with every change, and this file changes 
> quite often.
> 
> Then every project that depends on it, will download all the 
> dependencies, even if it's not using them (I think that's how maven works).
> 
> Carlo de Wolf wrote:
>> Almost practical example:
>>
>> AS -> EJB3 -> JPA -> Hibernate -> Logging (let's assume the Logging 
>> component is jboss-logging for this scenario)
>>
>> Which component(s) compromise the shared base?
>>
>> Carlo
>>
>> Andrew Lee Rubinger wrote:
>>> Back in March, I introduced the idea of a "Shared Component Matrix" 
>>> to be the authority over which versions AS would use.
>>>
>>> JIRA -
>>> https://jira.jboss.org/jira/browse/JBAS-5324
>>>
>>> Forum -
>>> http://www.jboss.com/index.html?module=bb&op=viewtopic&t=131748
>>>
>>> The intention was for this to be a component scoped outside of the 
>>> Application Server such that it could be relied upon by outside 
>>> projects.  In other words, both AS and jbossas/projects/* could rely 
>>> upon the same 3rdparty components.
>>>
>>> The Threads stop and don't explain why it was decided that 
>>> component-matrix should live inside AS, therefore ineligible to be 
>>> consumed outside due to cyclic dependencies.  I believe the reason 
>>> was "it makes it easier to tag AS altogether".
>>>
>>> I was opposed to this at the time, and it's still unacceptable. :)
>>>
>>> Concrete example of why:
>>>
>>> The last update to jboss-ejb3-proxy defined a dependency upon 
>>> jboss-metadata:1.0.0.CR8.  At the time, this was in sync between AS 
>>> and ejb3-proxy.
>>>
>>> Over the past few months, AS has updated jboss-metadata, now at 
>>> 1.0.0.CR14.  The dependency declared in ejb3-proxy is orphaned, and 
>>> has stayed constant.
>>>
>>> We've therefore been unit testing ejb3-proxy against stale 
>>> jboss-metadata.
>>>
>>> Tonight I go to update in preparation for a GA *RELEASE*, and guess 
>>> what?  Regression was introduced sometime in the past 4 months, I'm 
>>> just seeing it now, and this blocks the whole release process until I 
>>> can find and fix this bug.
>>>
>>> Please, let's re-open the discussion about a shared dependency policy.
>>>
>>> S,
>>> ALR
>>>
>>
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