[jira] [Created] (OAK-7851) Inline or remove embedding of Netty jars

["Robert Munteanu (JIRA)" <ji...@apache.org>]

Robert Munteanu created OAK-7851:
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             Summary: Inline or remove embedding of Netty jars
                 Key: OAK-7851
                 URL: https://issues.apache.org/jira/browse/OAK-7851
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: segment-tar
            Reporter: Robert Munteanu


The {{oak-segment}} jar embeds a number of jars, mostly from Netty: 

{noformat}concurrentlinkedhashmap-lru-1.4.2.jar
netty-buffer-4.1.14.Final.jar
netty-codec-4.1.14.Final.jar
netty-common-4.1.14.Final.jar
netty-handler-4.1.14.Final.jar
netty-resolver-4.1.14.Final.jar
netty-transport-4.1.14.Final.jar{noformat}

This causes a small performance hit on startup and the jars must be always expanded. This is more visible when using the Sling feature launcher as it uses references to existing jar files instead of copying them around.

There is also a space impact, as the embedded jars will be stored both in the segment-tar jar _and_ on disk after being copied out.

Additionally, the visibility of these jar can be controlled with the API regions mechanism, to make it clear that they are not mean to be consumed outside Oak, so it should be safe to remove the embedding altogether. Alternatively, these can be still embedded but also inlined.



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