[jira] [Commented] (STANBOL-774) Stanbol Bundels that export packages containing service interfaces or classes that are referenced in service interfaces need also import those packages

["Rupert Westenthaler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STANBOL-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475622#comment-13475622 ] 

Rupert Westenthaler commented on STANBOL-774:
---------------------------------------------

from the Bnd Tool documentation (http://www.aqute.biz/Bnd/Versioning)

## Substitution

> After the bundle has been created and analyzed bnd will see if an exported package is eligible for import. 
> An export is automatically imported when the following are true:
> 
>  * There exists at least one reference to the exported package from a private package
>  * The exported package has no references to any private packages
>  * The exported package does not have a -noimport: directive. 
> 
> If a package is imported it will use the version as defined by the version policy.

## Import Version Policy

> If you import a package bnd will look at the exported version of that package. 
> This version is not directly suitable for the import because it is usually too specific, 
> it needs a policy to convert this export version to an import version.

Two policies

>  -provider-policy :    ${range;[==,=+)}
>  -consumer-policy :    ${range;[==,+)}

consumer-policy is the default and should be used for everything other than packages containing Interfaces the current module/bundle actually implements.
                
> Stanbol Bundels that export packages containing service interfaces or classes that are referenced in service interfaces need also import those packages
> -------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: STANBOL-774
>                 URL: https://issues.apache.org/jira/browse/STANBOL-774
>             Project: Stanbol
>          Issue Type: Sub-task
>            Reporter: Rupert Westenthaler
>
> Host Applications that do run Stanbol in an embedded OSGI environment need to export all packages of used Interfaces (and all Classes used in those Interfaces). This is required to ensure that the java Classes used by Stanbol (running within the embedded OSGI environment) are the same as the one available to the Host application (see [1] for details).
> However Bundles that do not explicitly import packages they export will rather user their internal version instead of the version exported by the Host application causing the Class version to become incompatible (see [2] for details).
> [1] http://felix.apache.org/site/apache-felix-framework-launching-and-embedding.html#ApacheFelixFrameworkLaunchingandEmbedding-hostserviceusage
> [2] http://felix.apache.org/site/apache-felix-osgi-faq.html#ApacheFelixOSGiFAQ-Shouldabundleimportitsownexportedpackages?

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira