log4j log4j based loggers Log4cxx
Example
https://logging.apache.org/log4cxx/
- currently undergoing Incubation - there is no official release
- update/bug fixes once in the past 12 years, last release was 2008
- user can select different LogLevels – TRACE, DEBUG, INFO, WARN, ERROR, and FATAL
- hierarchical Loggers
- it is possible to log asynchronously
- supports multiple appenders
- user can select to enabled or disabled the logger
- log can be sent to different and multiple output targets
- user selected output formats
- well documented
- is licensed under the Apache License, an open source license certified by the Open Source Initiative
