* reason
there hardcodes DEBUG_LEVEL in logging.rb:
DEBUG_LEVEL = defined?(Logger) ? Logger::DEBUG : 0
this could cause some incompatibility between different logger tools
for Logger, DEBUG/0 < INFO/1 < WARN/2 < ERROR/3 < FATAL/4,
for Log4r, ALL/0 < DETAIL/1 < DEBUG/2 < INFO/3 < WARN/4 < ERROR/5 < FATAL/6.
anyway, it is not in good pattern.
* suggestion
logger.debug { ... }
if current level is greater than DEBUG, the block will not be
evaluated. it is also efficient.
following is also supported by most loggers.
logger.info { ... }
logger.warn { ... }
logger.error { ... }
...
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