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From Achim Nierbeck <bcanh...@googlemail.com>
Subject Re: features refresh mechanism?
Date Mon, 06 Dec 2010 22:12:01 GMT
After debugging, I'm not sure I do understand how this works. Does the 
FeaturesServiceImpl#findBundlesToRefresh() method only work on the
newly installed feature set? I thought it helps me refreshing already
installed
bundles/features.

> I will try to debug into this also,
> Jira Issue KARAF-312, does tell how to reproduce this.
>
>> I can try to investigate if you raise a JIRA and add the steps to reproduce ...
>>
>> On Mon, Dec 6, 2010 at 11:13, Achim Nierbeck <bcanhome@googlemail.com> wrote:
>>> Ok,
>>>
>>> this was exactly what I was expecting from the behavior.
>>> Now with a concrete example. Working on Pax-Web, one of the bundles
>>> has an optional dependency to eventadmin service packages.
>>> Now the eventadmin service feature is deployed after the pax-web stuff.
>>> I do get an exception since the bundle that declared those packages as
>>> optional dependencies wasn't refreshed, but the service tracker already
>>> worked :(
>>>
>>> Thanks, Achim
>>>
>>>> So the features service tries to find out which bundles are to be refreshed.
>>>> This is done by checking all bundles previously installed (note that
>>>> if you install several features, even including dependencies, bundles
>>>> should only be resolved at the end, so it only considers bundles that
>>>> were installed before the installation of the current features) for
>>>> optional packages that could be refreshed or new fragments.
>>>> The code is in FeaturesServiceImpl#findBundlesToRefresh() if you want
>>>> to have a look.
>>>> There are certainly some possible enhancements here, as it basically
>>>> try to do a poor-man's resolution (or at least try to check if
>>>> fragment's host and packages can be matched ...)  I guess ideally,
>>>> we'd do a fake resolution, and this might become possible with the
>>>> next OBR generation, but not really now.
>>>>
>>>> On Sun, Dec 5, 2010 at 21:36, Achim Nierbeck <bcanhome@googlemail.com>
wrote:
>>>>> Hi,
>>>>>
>>>>> how does the refresh mechanism work for features?
>>>>> For example you have a features A deployed and deploy another features
B.
>>>>> I sometimes see that certain bundles of features A are refreshed. How
is
>>>>> this
>>>>> accomplished? How am I able to trigger something like this?
>>>>>
>>>>> Greetings, Achim
>>>>>
>>


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