[jira] [Created] (LOG4J2-2455) ResourceBundleLookup does not work with default values

["Bhavesh Patel (JIRA)" <ji...@apache.org>]

Bhavesh Patel created LOG4J2-2455:
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             Summary: ResourceBundleLookup does not work with default values
                 Key: LOG4J2-2455
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2455
             Project: Log4j 2
          Issue Type: Bug
          Components: Lookups
    Affects Versions: 2.11.1
            Reporter: Bhavesh Patel


ResourceBundleLookup for Log4j 2 work incorrectly with default values. If you do a lookup using the following

${bundle:application:application.name}

it would work fine and return the value for application.name, if present.

But if you want to use a default value, incase if the key is not found, the lookup functions incorrectly. If you do a lookup using the following

${bundle:application:application.name:-None}

 the lookup should return "None" if the application key is not found. But this particular lookup will always return "None" even if the key is present in the specified resource bundle.

The issue seems to be that the resolveVariable() in org.apache.logging.log4j.core.lookup.StrSubstitutor class returns null; as the resolver is not able to perform the lookup correctly. The issue tracks back to 

org.apache.logging.log4j.core.lookup.Interpolator class. The constructor

Interpolator(*final* Map<String, String> properties) does not add ResourceBundleLookup to the "strLookupMap".

The fix is to add the ResourceBundleLookup to this map and then the bundle lookup functions correctly with the default value. The test for this feature, ResourceBundleLookupTest.java, needs to be updated to test for this scenario.



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