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https://issues.apache.org/jira/browse/SLING-4344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301462#comment-14301462
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Alexander Klimetschek commented on SLING-4344:
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IMO Sling i18n is not really designed for customer-changeable string
dictionaries.
> Modifying i18n language node in a path outside the resource resolver's search
> path will not invalidate the ResourceBundle cache
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: SLING-4344
> URL: https://issues.apache.org/jira/browse/SLING-4344
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Affects Versions: i18n 2.3.2
> Reporter: Konrad Windszus
> Fix For: i18n 2.3.4
>
> Attachments: SLING-4344-v02.patch
>
>
> Currently any modification of a Sling i18n message will not invalidate the
> {{resourceBundleCache}} in the {{JcrResourceBundleProvide}}
> (https://github.com/apache/sling/blob/trunk/contrib/extensions/i18n/src/main/java/org/apache/sling/i18n/impl/JcrResourceBundleProvider.java#L118),
> because the {{languageRoots}} for a {{JcrResourceBundle}} with a unique
> basename and contents only outside of the resource resolver's search path are
> always empty
> (https://github.com/apache/sling/blob/trunk/contrib/extensions/i18n/src/main/java/org/apache/sling/i18n/impl/JcrResourceBundle.java#L211).
> I would argue that it should be allowed to place language nodes anywhere in
> the repository, which seems to work well except for the cache invalidation.
> The problem is in the {{loadFully}} method
> (https://github.com/apache/sling/blob/trunk/contrib/extensions/i18n/src/main/java/org/apache/sling/i18n/impl/JcrResourceBundle.java#L155)
> which will only set languageRoots if they are below any of the resource
> resolver's search paths.
> To reproduce the issue you can just add the following node structure
> {code}
> /content/languages
> +-- English (nt:folder, mix:language)
> | +-- jcr:language = en
> | +-- basename = myuniquebasename
> | +-- m1 (sling:messageEntry)
> | | +-- sling:key = "msg001"
> | | +-- sling:message = "This is a message"
> {code}
> Then load the key from this resource bundle (by giving the right basename).
> It will internally put the resource bundle into the cache (although all
> contents of the given resource bundle are outside any of the default search
> paths /apps or /libs). Whenever you change the message that won't be
> reflected, because the resource bundle cache is not invalidated (caused by
> the empty {{languageRoots}}) therefore the old message would still be
> exposed, until you restart the Sling i18n bundle.
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