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From Oliver Heger <>
Subject Re: [all] maven group ids
Date Sat, 19 Aug 2006 15:09:32 GMT
Tomasz Pik wrote:
> On 8/16/06, Dennis Lundberg <> wrote:
>> > Yes, but instead of transiting something, that depends on other commons
>> > IMHO something without dependencies should be transited first.
>> > In other words, first thing to be done should be a graph of 
>> dependencies
>> > between various commons packages and those without dependencies
>> > should be migrated first. I guess commons-lang is a good candidate 
>> here,
>> > not configuration that depdends on many other (not migrated yet)
>> > components.
>> What would we gain from this? A transition of component A will not
>> include updating existing commons-dependencies in component A to the new
>> ones with the new groupId. That will require a new release of that
>> component A. If fact we don't even have to wait for a release of a
>> component to do this.
>> There is a good reason for *not* picking commons-lang or
>> commons-logging, two components without dependencies on other commons
>> components, as the first component to transition. That is that both are
>> on ibiblio's top 10 downloads list. I had link to it before but can't
>> seem to find it now, sorry. If we do it wrong there then all hell will
>> break loose. It'd be better to choose a "medium used" component.
> But this means, that all of those users, that downloading those top10
> jars in near future will have obosolete jars.
> Maven is not re-downloading nonSNAPSHOT artifacts so...
> Let's imagine I'm a new maven user having project with a dependency on
> commons-lang:commons-lang-2.1 and maven will download it for me.
> Some time later this package will be relocated to
> org.apache.commons.lang:commons-lang:2.1 (or similar).
> After that there'll be new, let's say acegi v1.4 depending on this 'new'
> commons-lang (org.apache....:commons-lang:2.1) and I need this acegi
> in my project.
> So after adding dependency on acegi maven will download
> org.apache.commons.lang:commons-lang:2.1 and won't download
> commons-lang:commons-lang:2.1 (which should result as relocation
> info) and finally, maven will be adding those two commons-lang jars
> into classpath, copy into WEB-INF/lib and so on.
> All of this till the time I'll manually remove 
> commons-lang:commons-lang:2.1
> from my repository so maven will be forced to reload them (and will
> download relocation info then).
> So finally I think that sooner those jars will be relocated there'll be 
> less
> users having problems like this.
> Regards,
> Tomek
> -- 
>> Dennis Lundberg

There are good reasons in this thread from both sides. Being no maven 
expert I cannot judge which ones are better.

But as long as this point is open I don't want to cut the next release 
candidate for [configuration]. So can we come to a consensus?


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