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From "Richard S. Hall (JIRA)" <j...@apache.org>
Subject [jira] Updated: (FELIX-1754) Usage of BundleContext.getServiceReferences results in failure to activate components
Date Mon, 26 Oct 2009 22:10:59 GMT

     [ https://issues.apache.org/jira/browse/FELIX-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Richard S. Hall updated FELIX-1754:

    Attachment: FELIX-1754.txt

> Usage of BundleContext.getServiceReferences results in failure to activate components
> -------------------------------------------------------------------------------------
>                 Key: FELIX-1754
>                 URL: https://issues.apache.org/jira/browse/FELIX-1754
>             Project: Felix
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: felix-2.0.1
>            Reporter: Matthew Sykes
>            Priority: Minor
>             Fix For: felix-2.2.0
>         Attachments: assignable.diff, FELIX-1754.txt
> I'm attempting to move some code from Equinox to Felix that makes use of the declarative
services 1.1 runtime.  Many of the components in our bundles declare multiple 'provide' elements
in the service declaration .  In general these services consist of a standardized interface
in one package and extensions to that interface in another.  Depending on the requirements
of the code using the component, other bundles will declare their components with references
to either the standardized interface or the extended interface.
> The issue I'm seeing is that the Felix SCR fails to activate some components because
it's failing to resolve references to the service provided by another component.  It turns
out that the SCR is using BundleContext.getServiceReferences instead of BundleContext.getAllServiceReferences
to locate candidate services when resolving references.  Unfortunately, the getServiceReference
flavor requires that the using bundle have access to all class names under which the target
service was registered - not just the interface associated with the reference.
> Given the use-case I've described and the behavior of Equinox, I believe the Felix SCR
should be using BundleContext.getAllServiceReferences(..) to resolve references and rely on
the bundle creator to define the correct imports.

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