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https://issues.apache.org/jira/browse/OAK-4451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15385545#comment-15385545
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Alex Parvulescu commented on OAK-4451:
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a minor observation (probably IDE introduced), you used the following java 7 
constructs in the {{ReaderCache}}: {{new CacheKey<>(hash, msb, lsb, offset)}} 
and {{new FastCacheEntry<>(hash, msb, lsb, offset, value))}}, I think it would 
be simpler to write the types (I'm mainly thinking backports), but that might 
be just me. if this was on purpose, then please ignore the comment.

> Implement a proper template cache
> ---------------------------------
>
>                 Key: OAK-4451
>                 URL: https://issues.apache.org/jira/browse/OAK-4451
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: cache, monitoring, production
>             Fix For: 1.6, Segment Tar 0.0.6
>
>
> The template cache is currently just a map per segment. This is problematic 
> in various ways: 
> * A segment needs to be in memory and probably loaded first only to read 
> something from the cache. 
> * No monitoring, instrumentation of the cache
> * No control over memory consumption 
> We should there for come up with a proper template cache implementation in 
> the same way we have done for strings ({{StringCache}}) in OAK-3007. 
> Analogously that cache should be owned by the {{CachingSegmentReader}}. 



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