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From sebb <seb...@gmail.com>
Subject Re: HC 5.0: co-location with HC 4.x
Date Thu, 19 Nov 2015 12:11:07 GMT
On 19 November 2015 at 11:32, Oleg Kalnichevski <olegk@apache.org> wrote:
> Folks
> I would like to start working on the first alpha releases of HC 5.0.
> There is one issue that still needs to be discussed though before I can
> proceed. We need to decide on how we intent to maintain compatibility
> with HC 4.x. It is pretty clear that maintaining full compatibility is
> unrealistic and probably counter-productive. HC 5.0 is likely to have
> different APIs especially once HTTP/2 transport is implemented.
> A pragmatic approach could be to make HC 5.0 and HC 4.x deployable
> within the same class loader context (so called co-location). This is
> what Apache Commons do with their major releases. We should do
> likewise.
> Effectively co-location is about moving major releases to a new package
> space like org.apache.commons.lang3, org.apache.commons.lang4, etc. I
> think we should adopt a compatible scheme. The trouble is that when the
> project was started in 2005 the choice of 'org.apache.http' was pretty
> natural and in line with Jakarta practices (anyone here still remembers
> Apache Jakarta?). Now it can be seen as too presumptuous. This would be
> a good opportunity to fix that.
> What would be a better name space for the project in your opinion?
> org.apache.http<n>
> org.apache.http.hc<n>
> org.apache.hc<n>.http
> where <n> is a major release version
> Something else? Any thoughts or preferences?

Java package names and Maven groupIds need to be globally unique.

Both of these currently start with org.apache, which is a good start
as it means possible duplicates are restricted to ASF projects.

However we should also try and minimise our use of top-level
sub-domains of the org.apache domain.
[As Commons does]

HC currently uses:

Gid: org.apache.httpcomponents
Package: org.apache.http

Therefore any package names need to be under org.apache.http, e.g.

Commons uses the artifactId to distinguish different release versions,
keeping the same GID.

> Oleg
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