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https://issues.apache.org/jira/browse/TIKA-4700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18068350#comment-18068350
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Konrad Windszus commented on TIKA-4700:
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An example can be seen in
https://github.com/qos-ch/slf4j/blob/d2073bece8310017914e1ff65d7107b2d4869c7d/slf4j-api/pom.xml#L69
(Consumer) and
https://github.com/qos-ch/slf4j/blob/d2073bece8310017914e1ff65d7107b2d4869c7d/parent/pom.xml#L354
(Provider)
> Support OSGi Service Loader Mediator Spec
> -----------------------------------------
>
> Key: TIKA-4700
> URL: https://issues.apache.org/jira/browse/TIKA-4700
> Project: Tika
> Issue Type: Improvement
> Reporter: Konrad Windszus
> Priority: Major
>
> The [Java Service
> Loader|https://docs.oracle.com/javase/8/docs/api/java/util/ServiceLoader.html]
> is not properly supported in OSGi cross bundle boundaries due to Classloader
> visibility restrictions. In order to circumvent this limitation the [OSGi
> Service Loader Mediator
> Specification|https://docs.osgi.org/specification/osgi.cmpn/7.0.0/service.loader.html]
> defines certain {{Capabilities}} which are used to set up a registry where
> all bundles have access to providers (no matter from which bundles).
> This mechanism is just relying on additional Manifest headers which don't
> impact usability of those JARs outside OSGi.
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