[jira] [Updated] (CAMEL-8046) Use OSGi capabilities to offer components

["Claus Ibsen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-8046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claus Ibsen updated CAMEL-8046:
-------------------------------
    Fix Version/s:     (was: 2.16.0)
                   2.17.0
                   Future

> Use OSGi capabilities to offer components
> -----------------------------------------
>
>                 Key: CAMEL-8046
>                 URL: https://issues.apache.org/jira/browse/CAMEL-8046
>             Project: Camel
>          Issue Type: New Feature
>          Components: osgi
>    Affects Versions: 2.14.0
>            Reporter: Christian Schneider
>            Assignee: Christian Schneider
>             Fix For: Future, 2.17.0
>
>
> Currently bundles using camel detect components at runtime. 
> If a component is missing then there are two cases:
> - blueprint : The user bundle goes into graceperiod status and waits for the component to come up. In case the component is still missing there is a failure.
> - In other cases: Camel will simply display and error about the missing component. 
> The proper OSGi way to handle camel components would be to use capabilities and requirements. 
> See
> http://wiki.osgi.org/wiki/Provide-Capability
> http://wiki.osgi.org/wiki/Require-Capability
> So a bundle offering a component should have a capability to express that as well as the user bundle should have a requirement for the capability.
> This will even allow a suitable OSGi resolver to auto install bundles that match the required capabilties. In any case it will make sure the required components are installed before the user bundle starts. 
> So to support this the first decision is how to name the capability.
> I propose: "org.apache.camel.component".
> Then we have to decide how we name the components. I propose we use the component prefix. E.g "file" for the file component.
> The next thing is to add the Provide-Capability headers to the components. This has to be done before the users start creating Require-Capability headers. 
> To automate this step I propose to create a maven plugin that scans for META-INF/services/org/apache/camel/component/* files and creates suitable headers.



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