Debug logs at log level DEBUG where currentLogLevel is set to TRACE, DEBUG.

Error logs at log level ERROR where currentLogLevel is set to TRACE, DEBUG, INFO, WARN, ERROR.

Fatal logs at log level FATAL where currentLogLevel is set to TRACE, DEBUG, INFO, WARN, ERROR, FATAL.

Info logs at log level INFO where currentLogLevel is set to TRACE, DEBUG, INFO.

Instantiate will read environment variable LOG_LEVEL, if not there or invalid, defaults to INFO.

Trace logs at log level TRACE where currentLogLevel is set to TRACE.

Warn logs at log level WARN where currentLogLevel is set to TRACE, DEBUG, INFO, WARN.