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https://issues.apache.org/jira/browse/LOG4J2-2904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17173650#comment-17173650
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Tommy.Tesla commented on LOG4J2-2904:
-------------------------------------
Ok, glad to do that.
> Provide a way to add customized StrLookUps in Interpolator initialization.
> ---------------------------------------------------------------------------
>
> Key: LOG4J2-2904
> URL: https://issues.apache.org/jira/browse/LOG4J2-2904
> Project: Log4j 2
> Issue Type: Improvement
> Components: Core
> Affects Versions: 2.13.3
> Reporter: Tommy.Tesla
> Priority: Major
>
> Currently, there are following strlookups :
>
> public Interpolator(final Map<String, String> properties) {
> ...
> // TODO: this ought to use the PluginManager
> strLookupMap.put("log4j", new Log4jLookup());
> strLookupMap.put("sys", new SystemPropertiesLookup());
> strLookupMap.put("env", new EnvironmentLookup());
> strLookupMap.put("main", MainMapLookup.MAIN_SINGLETON);
> strLookupMap.put("marker", new MarkerLookup());
> strLookupMap.put("java", new JavaLookup());
> strLookupMap.put("lower", new LowerLookup());
> strLookupMap.put("upper", new UpperLookup());
> ...
>
> BUT, at sometime, we hope to add a customized LookUp implement to resolve the
> variable in log4j2.xml.
> Advice: a SPI for StrLookUp could support this feature.
>
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