Substituting parameters in a log message and adding Throwable to Log4j 2

Question

I am trying to log an exception and would like to include a different variable value in the log message. Is there a Logger API that does this?

logger.error("Logging in user {} with birthday {}", user.getName(), user.getBirthdayCalendar(), exception);

Answer 1

Have you tried watching ParameterizedMessage ?

From the documents

Parameters:

messagePattern - the message format string. This will be a String containing "{}" placeholders where the parameters must be substituted.

objectArgs - arguments to substitute.

throwable - A Throwable