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log4l provides a simple API to use logging features in Lua. Its design was based on log4j. https://github.com/mwchase/log4l
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log4l ========== https://mwchase.github.io/log4l/ log4l provides a simple API to use logging features in Lua. Its design was based on log4j. log4l currently supports, through the use of appenders, console, file, rolling file, email, socket and sql outputs. Current version is 1.3.0. It was developed for Lua 5.1 & 5.2. log4l is free software and uses the same license as Lua. It is part of the Kepler Project. Please see docs at http://neopallium.github.com/lualogging/ for more details Installation ============ Release 0.1 ------------- With LuaRocks: $ sudo luarocks install log4l Latest Git revision ------------------- With LuaRocks: $ sudo luarocks install https://github.com/mwchase/log4l/raw/log4l/log4l-scm-0.rockspec With make: $ sudo make Guide lines for improved logging performance ============================================ The changes that I have made allow more complex log message formatting to be done only when that log level is enabled. This will decrease the impact of logging statement when their level is disabled. * Use string.format() style formatting: logger:info("Some message prefix: val1='%s', val2=%d", "some string value", 1234) * For more complex log message formatting: local function log_callback(val1, val2) -- Do some complex pre-processing of parameters, maybe dump a table to a string. return string.format("Some message prefix: val1='%s', val2=%d", val1, val2) end -- function 'log_callback' will only be called if the current log level is "DEBUG" logger:debug(log_callback, "some string value", 1234)