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https://issues.apache.org/jira/browse/LOG4J2-2732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16990314#comment-16990314
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ASF subversion and git services commented on LOG4J2-2732:
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Commit f350dca4376b2dc5d8cc885de3b5aed7fd9bf0aa in logging-log4j2's branch
refs/heads/master from Matt Pavlovich
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=f350dca ]
[LOG4J2-2732] Compile fix for ThreadContext.putIfNull(string, string)
> Add ThreadContext.putIfNull(String, String)
> -------------------------------------------
>
> Key: LOG4J2-2732
> URL: https://issues.apache.org/jira/browse/LOG4J2-2732
> Project: Log4j 2
> Issue Type: New Feature
> Components: API
> Reporter: Matt Pavlovich
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Provide a helper method that provides a 1-liner to put an identifier only if
> it is not currently set. This removes an if-check in all classes that share a
> design approach of assessing a uniqueId, such as request id, etc.
> {noformat}
> if(!ThreadContext.containsKey("uniqueId")) {
> ThreadContext.put("uniqueId", generateUniqueId());
> }
> {noformat}
> Proposed:
> {noformat}
> ThreadContext.putIfNull("uniqueId", generateUniqueId());
> {noformat}
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