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https://issues.apache.org/jira/browse/LOG4J2-112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Johle updated LOG4J2-112:
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Issue Type: Improvement (was: Question)
> Why is FileRenameAction a final class?
> --------------------------------------
>
> Key: LOG4J2-112
> URL: https://issues.apache.org/jira/browse/LOG4J2-112
> Project: Log4j 2
> Issue Type: Improvement
> Components: Core
> Affects Versions: 2.0-beta2
> Reporter: David Johle
> Priority: Minor
> Labels: features
> Attachments: make_DefaultRolloverStrategy_purge_extensible.patch,
> make_FileRenameAction_extensible.patch
>
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> First some backstory:
> I have a special need to allow the use of a common/shared log file within a
> clustered environment. I have already taken other measures necessary to
> handle the simultaneous writing of logging events to the same file w/o
> corruption. I have been using log4j 1.2.x for a while for this purpose, and
> it's been working in a production environment for quite some time actually.
> What I did there is make my own DailyRollingSharedFileAppender (based on the
> old DailyRollingFileAppender) that contains some custom logic & locking to
> provide a safe mechanism for handling file rollovers on the shared files.
> I am currently in the process of upgrading to log4j2 for several reasons, and
> as such am working to re-implement this concept by making a couple of custom
> classes to augment log4j2 accordingly. Given the new architecture (which is
> very nice, BTW) I think this should actually a fairly straightforward
> process...
> 1) Create a SharedFileRenameAction that extends FileRenameAction (has my
> custom logic & locking)
> 2) Create a SharedFileRolloverStrategy that extends DefaultRolloverStrategy
> (no gz/zip support, uses SharedFileRenameAction)
> 3) Reference SharedFileRolloverStrategy in log4j2.xml for the appenders using
> shared files
> So for this, I only need to override a few things in these classes, and as
> such I'd rather extend them than completely write new ones. For #2 this is
> not an issue, but for #1 I have hit a snag:
> public final class FileRenameAction extends ActionBase
> (note: using beta-2 here, in trunk ActionBase is now AbstractAction)
> I've marked this issue as "Question" for now, so here is that question:
> Why is FileRenameAction marked final?
> If there was no intentional restriction on extensibility here, then I'd like
> to make this issue an "Improvement" instead, requesting that this class no
> longer have the final qualifier.
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