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https://issues.apache.org/jira/browse/AVRO-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181058#comment-13181058
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Ioannis Canellos commented on AVRO-987:
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Regarding the maintenance burden: this patch does not duplicate version
information at all. Package versions are calculated by the maven bundle plugin.
Ideally we can specify the version ranges of our likes with a small maintenance
overhead, but from my experience I can say that when you use ranges they don't
change that often, so the overhead is usually minimal.
Regarding the ClassLoadingUtils and the use of TCCL: I am glad we agree the
Class.forName needs to replaced. The question is "replaced with what?".
Unfortunately the options are pretty limited here:
i) Use of TCCL.
ii) Pass the classloader to the object that needs to load the class.
iii) Use object factories, etc.
I am excluding option (iii) as I think that its not a good fit (personally I
feel its best fits OSGi powered projects, but this is not the case). Option
(ii) would be cleaner, but I don't know how easy it is to implement. So I think
that option (i) as a fallback solution is the easiest way to get things moving
and in most cases it just works. The fact that its used as last resort has no
impact on non-OSGi environments, so you don't have to worry about breaking
things.
We can start with that and then gradully move things towards (ii). I would be
more than glad to help on this effort.
I am not sure if the comment about, the optional imports was aiming at this
patch or was a general comment about osgi, but I'll clarify their use anyway
:-).
Some of the imports like the servlet api, velocity, xerial etc are not used in
all use cases (or at least I think that they are not, so feel free to correct
me), so its not a good idea to have them as required. I totally agree with you
that they should be used for a good reason, but I think that in this patch the
reason is good enough.
> Make Avro OSGi ready
> --------------------
>
> Key: AVRO-987
> URL: https://issues.apache.org/jira/browse/AVRO-987
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Ioannis Canellos
> Attachments: AVRO-987-patch.txt, AVRO-987-updated.txt
>
>
> It would be really nice to be able to use Avro inside OSGi. To achieve this
> two things are required:
> i) Provide proper MANIFEST.MF.
> ii) Deal with potential class loading issues. Avro uses Class.forName a lot
> and that is not very OSGi friendly.
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