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https://issues.apache.org/jira/browse/STANBOL-146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019033#comment-13019033
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Rupert Westenthaler commented on STANBOL-146:
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In the meantime it is already added to the parent
> DataFileProvider service
> ------------------------
>
> Key: STANBOL-146
> URL: https://issues.apache.org/jira/browse/STANBOL-146
> Project: Stanbol
> Issue Type: Improvement
> Components: Commons
> Reporter: Bertrand Delacretaz
> Assignee: Bertrand Delacretaz
> Priority: Minor
> Attachments: dfp-console.jpg
>
>
> Several stanbol enhancer engines and other components use potentially large
> read-only data files (models, indexes etc.), and some of those cannot be
> distributed with Stanbol because of licensing or size issues.
> We discussed this at the Saarbrücken workshop and came up with these specs
> for a DataFileProvider service:
> DataFileProvider provides data files (InputStreams actually) to OSGi
> components.
> Bundles can provide default data files via their own DataFileProvider
> services. The main DataFileProvider has a service.ranking of 0 to make it the
> default provider. A bundle that provides a DataFileProvider service must
> register it in its Activator, so that it's up before any component of the
> bundle asks for it.
> The main DataFileProvider ignores other providers if it finds the requested
> data file in the filesystem, in a specific folder ("datafiles folder"). The
> name of that folder is configurable in the main DataFileProvider service.
> When a bundle with symbolic name foo asks for data file bar.bin, the main
> DataFileProvider first looks for a file named foo-bar.bin in the datafiles
> folder, then for a file named bar.bin.
> A request for a data file can include a downloadExplanation String, that
> describes how to get the full data file, in case we only supply a default
> smaller one.
> An OSGi console plugin lists all (successful or failed) requests to the main
> DataFileProvider service, along with their downloadExplanations. This list of
> requests can also be queried so that failed requests can be shown on the
> stanbol server home page, for example. This provides a single location where
> stanbol users see what data files are needed and which ones were actually
> loaded from where.
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