**Logging** is a flexible logging library for use in Ruby programs based on the design of Java's log4j library. It features a hierarchical logging system, custom level names, multiple output destinations per log event, custom formatting, and more.
A structured logging system is capable of handling a message, custom data or an exception easily. It has JSON formatters compatible with Bunyan or pino for Node.js and human readable formatter with Awesome Print for console.
Lumber tries to make it easy to use the more robust log4r logging system within your rails application. To do this it sets up log4r configuration from a yml file, and provides utility methods for adding a :logger accessor to classes dynamicaly as they get created.