AWS lambda: Is there a way to set default value if the environment variable doesn't exist in the log4j.xml?

Question

I have aws lambda function implementation using java. I am using the standard log4j configuration to log into cloudwatch . I am able to access the aws lambda environment runtime variable into my log4j to set my log level. The only question I have - Is there a way we can default the log level to something in the absence of the environment variable value in the log4j.xml?

Below is the log4j.xml configuration I have.

< Loggers></br>
    < Root level="debug"><\br>
        < AppenderRef ref="Lambda" /><\br>
    < /Root><\br>
< /Loggers>

RV. · Accepted Answer · 2019-04-24 18:55:09Z

1

You can migrate to Log4j2 (currently supported by AWS Lambda, you can find details on AWS GitHub), It has "Lookups" feature which allows to use environment variables in Log4j2 configuration file: http://logging.apache.org/log4j/2.x/manual/lookups.html#EnvironmentLookup

So you could use something like this in your configuration file: "${env:VAR_NAME:-info}", where -info would be a default logging level.

answered Apr 24, 2019 at 18:55

RV.

3,0484 gold badges32 silver badges49 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

AWS lambda: Is there a way to set default value if the environment variable doesn't exist in the log4j.xml?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related