Woonsan Ko created LOG4J2-419:
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Summary: Support default value for missing key in look ups with
fallbacking to looking in the properties map
Key: LOG4J2-419
URL: https://issues.apache.org/jira/browse/LOG4J2-419
Project: Log4j 2
Issue Type: Improvement
Reporter: Woonsan Ko
Priority: Minor
It is more useful and flexible to allow default value in the variable
expression itself.
For example, ${var1:-defvalue1}, ${ctx:request_id:-defvalue2}, etc.
This generic feature has been included in StrSubstitutor of commons-lang3 as
well with the following issue:
- https://issues.apache.org/jira/browse/LANG-893
The benefit from the feature with LANG-893 is we can use it more widely
whenever used in look ups.
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