* ALL : All levels including custom levels
* TRACE : Designates finer-grained informational events than the DEBUG
* DEBUG : Designates fine-grained informational events that are most useful to debug an application
* INFO : Designates informational messages that highlight the progress at a coarse-grained level
* ARN : Designates potentially harmful situations
* ERROR : Designates error events that might still allow the application to continue running
* OFF : The highest possible rank and is intended to turn off logging
