custom-logger | simple , customizable logger for node

We are trying something new and posting the question here to see if it is possible.

TL;DR Overriding a parent custom ConfigurationFactory in a web app.

Scenario: We have bunch of web applications. Some of those web applications write the logs to same log file and other web applications to application related individual log files. So I have written a CustomLoggerConfigFactory (let's call this as parent configuration for the sake of discussion) and bundled that up in a custom-logger-util.jar and using this jar as a dependency in the web applications and the logger is getting initialized during web app startup. This configuration has a RollingFileAppender after initialized writes the logs to a file named: common-logs.log which is working fine. Here below is the code for CustomLoggerConfigFactory.

Problem: Now my question is, say in a web application B, also where the common-logger-util.jar is used as a dependency - how can I extend the CustomLoggerConfigFactory to override the RollingFileAppender to write the logs to appB.log file instead of common-logs.log programmatically and without using config files and keeping the rest of the configuration the same i.e. to use the Console appender, Loggers(including RootLogger) as defined by parent config factory? Can anyone please explain how to achieve this?

Thanks in advance.