Richard, 



Sounds like having the default behavior for the export tag being to set 
noimport to true may be the best solution.  Do you agree? 



v/r, 



Mike Van 


----- Original Message ----- 
From: "Richard S. Hall" <[email protected]> 
To: [email protected] 
Sent: Wednesday, November 3, 2010 5:09:45 PM 
Subject: Re: Default setting of <Import-Package> of maven-bundle-plugin 

On 11/3/10 17:04, [email protected] wrote: 
> 
> All, 
> 
> 
> 
> Recently I've been struggling with the issue of my packages importing what 
> they export, and receiving unresolved constraint violations. 
> 
> 
> 
> Currently, using the maven-bundle-plugin, I am using the default behavior of 
> the<Import-Package>  and<Export-Package>  tags.  This results in (among other 
> things), the Import-Package portion of my MANIFEST.MF file containing all 
> packages exported in the Export-Package section. 
> 
> 
> 
> To fix this, I have been 
> using<Export-Package>*;-noimport:=true</Export-Package>. 
> 
> 
> 
> When explaining this in the IRC channel for #karaf, I was told that bundles 
> shouldn't be importing thier own packages.  If this is true, should the 
> default behavior of<Export-Package>  be changed to -noimport:=true? 

The issue here is that there is no single rule that works in all cases. 
Pure API packages (e.g., service interfaces) should be exported and 
imported, but only if they are packaged with an implementation of the 
service. If they are packaged in just a library bundle with no 
implementation, then there is no reason to import them and actually it 
is bad to do so. 

We need to get a new version of the maven-bundle-plugin out that 
integrates with a newer version of bnd, because Peter Kriens and I have 
tried to improve the heuristics for determining when to import what you 
export, whereas the version of bnd currently used always imports what 
you export (by default). 

Unfortunately, there are some issues that I am not sure how to resolve 
to getting a new release of maven-bundle-plugin out the door, so 
hopefully people who are "in the know" can help out. 

-> richard 

> 
> 
> 
> 
> v/r, 
> 
> 
> 
> Mike Van 
> 

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