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https://issues.apache.org/jira/browse/LOG4J2-435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15035851#comment-15035851
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Robert Schaft commented on LOG4J2-435:
--------------------------------------
What I proposed in my post with all the triggers, filters, and sets could be
translated to:
{code:xml}
<Delete baseDir="logs">
<If>
<Or>
<And>
<LastModified age="90d"/>
<FileSize exceeds="100M" />
</And>
<And>
<FileName glob="**/*.log.gz" />
<LastModified age="7dT1h" />
</And>
<And>
<FileName pattern="\d+-\d{2}/app-[/]*-\d+\.log.gz" />
<LastModified age="7d" />
</And>
<LastModified age="180d" />
</Or>
<Then>
<DeleteIt/>
</Then>
</If>
</Delete>
<Delete baseDir="logs">
<If>
<Or>
<FileName pattern="\d+-\d{2}/app-[/]*-\d+\.log.gz" />
<And>
<FileName glob="**" />
<LastModified age="30d" />
</And>
</Or>
<Then>
<If>
<Or>
<AccumulatedFileCount exceeds="100" />
<AccumulatedFileSize exceeds="10gb" />
<And>
<AccumulatedFileCount count="90" />
<AccumulatedFileSize exceeds="9gb" />
</And>
</Or>
<Then>
<DeleteIt />
</Then>
</If>
</Then>
</If>
</Delete>
{code}
Hey, that works, too!
Ok, translating it to your vocabulary:
# Replace all {{<If><Or>}} with {{<IfAny>}}. First observation: it seems that
{{<IfAll><Or>}} or {{<IfAny>}} is the same. You could drop {{<IfAny>}} and your
vocabulary doesn't loose any expressiveness. I'll keep it nonetheless to come
to a similar solution as you would be.
# Replace all {{<If><And>}} with {{<IfAll>}}. Nothing to do. There is no
{{<If><And>}} in this example.
# Replace the {{<Then><IfAll>}} with {{<ThenAlsoCheck>}}. Problem: {{<Then>}}
comes in this example with {{<IfAny>}}. Workaround: Replace {{<Then><IfAny>}}
with {{<Then><IfAll><Or>}}, which could be replaced with
{{<ThenAlsoCheck><Or>}}.
# Drop all {{<Then><DeleteIt/></Then>}}. No problems. It seems to be totally
redundant and is always clear where it stands (in {{<If>}}s that have neither a
{{<Then>}} nor a {{<Else>}} branch (not sure about the latter)).
# Drop the top level {{<IfAll>}}. To bad. There is none. Top level is
{{<IfAny>}}. So I have to work around it by replacing top level {{<IfAny>}}
with {{<IfAll><Or>}} and delete the {{<IfAll>}} part (effectively {{<IfAny>}}
becomes {{<Or>}} at top level).
Result:
{code:xml}
<Delete baseDir="logs">
<Or>
<And>
<LastModified age="90d"/>
<FileSize exceeds="100M" />
</And>
<And>
<FileName glob="**/*.log.gz" />
<LastModified age="7dT1h" />
</And>
<And>
<FileName pattern="\d+-\d{2}/app-[/]*-\d+\.log.gz" />
<LastModified age="7d" />
</And>
<LastModified age="180d" />
</Or>
</Delete>
<Delete baseDir="logs">
<Or>
<FileName pattern="\d+-\d{2}/app-[/]*-\d+\.log.gz" />
<And>
<FileName glob="**" />
<LastModified age="30d" />
</And>
<ThenAlsoCheck>
<Or>
<AccumulatedFileCount exceeds="100" />
<AccumulatedFileSize exceeds="10gb" />
<And>
<AccumulatedFileCount count="90" />
<AccumulatedFileSize exceeds="9gb" />
</And>
</Or>
</ThenAlsoCheck>
</Or>
</Delete>
{code}
> Feature request: auto-delete older log files
> ---------------------------------------------
>
> Key: LOG4J2-435
> URL: https://issues.apache.org/jira/browse/LOG4J2-435
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Arkin Yetis
> Assignee: Remko Popma
> Labels: Rollover
> Fix For: 2.5
>
> Attachments: LimitingRolloverStrategy.java, SizeParser.java
>
>
> Original description:
> {quote}
> DefaultRolloverStrategy max attribute only applies if you have a %i in the
> file pattern. This request is to enhance DefaultRolloverStrategy or another
> appropriate component to allow a max number of files limit to apply across
> days/months/years when a filePattern includes a date pattern.
> {quote}
> ----
> One of the most requested features is to add the ability to Log4j to "clean
> up" older log files. This usually means deleting these files, although it
> could also mean moving them to a different location, or some combination of
> these.
> Users have different requirements for selecting the files to clean up. A
> common request is the ability to keep the last X number of log files. This
> works well if rollover is only date based but may give undesired results with
> size based rollover.
> Another factor to consider is that the directory containing the log files may
> contain the log files for multiple appenders, or even files unrelated to
> logging.
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