How to mask credit card numbers in log files with Log4J?

Question

Our web app needs to be made PCI compliant, i.e. it must not store any credit card numbers. The app is a frontend to a mainframe system which handles the CC numbers internal

Answer 1

You could write your own layout and configure it for all appenders...

Layout has a format method which makes a String from a loggingEvent that contains the logging message...