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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2011/01/11 00:45:47 UTC
[jira] Updated: (LUCENE-2474) Allow to plug in a Cache Eviction
Listener to IndexReader to eagerly clean custom caches that use the
IndexReader (getFieldCacheKey)
[ https://issues.apache.org/jira/browse/LUCENE-2474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless updated LUCENE-2474:
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Attachment: LUCENE-2474.patch
OK, here's a patch exposing the readerFinishedListeners as static methods on IndexReader.
It was also nice to consolidate all the various places we were previously purging the FieldCache.
> Allow to plug in a Cache Eviction Listener to IndexReader to eagerly clean custom caches that use the IndexReader (getFieldCacheKey)
> ------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-2474
> URL: https://issues.apache.org/jira/browse/LUCENE-2474
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Shay Banon
> Attachments: LUCENE-2474.patch, LUCENE-2474.patch
>
>
> Allow to plug in a Cache Eviction Listener to IndexReader to eagerly clean custom caches that use the IndexReader (getFieldCacheKey).
> A spin of: https://issues.apache.org/jira/browse/LUCENE-2468. Basically, its make a lot of sense to cache things based on IndexReader#getFieldCacheKey, even Lucene itself uses it, for example, with the CachingWrapperFilter. FieldCache enjoys being called explicitly to purge its cache when possible (which is tricky to know from the "outside", especially when using NRT - reader attack of the clones).
> The provided patch allows to plug a CacheEvictionListener which will be called when the cache should be purged for an IndexReader.
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