On Dec 2, 2009, at 7:29 PM, Ivan wrote:
Hi,
Currently, Geronimo uses many third-parties bundles (like
pubished by ServiceMix), also publishes some bundles by our own. So,
whether importing and exporting the packages at the same time, I
think we need to have a same convention. I checked the bundles
published by ServiceMix, for those tool components, like commons-*,
they do not import their own packages. I also found those bundles
published by Felix always import those packages. Generally
specaking, it is hard to say which one is better. So, for Geronimo,
personally, I prefered the way of ServiceMix, which does not import
those packages at the same time for those tool-like components.
Any comment ?
I've had some discussions with Guillaume about this. There are some
circumstances where having 2 versions of a jar, importing what you
export, and loading the jars in the wrong order can cause problems.
This is why Guillaume has adopted the servicemix approach.
I think this is wrong and that such problems should be avoided by
package versioning and scoping or bundle isolation. I don't think rfc
138 is going to provide a very usable solution but it is likely to be
the best we can come up with at this point.
Anyway I think we should follow everyone else's advice and import what
we export. It is really only crucial when a bundle registers some
services but I think it is still good practice.
thanks
david jencks
--
Ivan
