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Contents
# :stopdoc:
#
# Any Ruby object can be passed to the log methods of a logger. How these
# objects are formatted by the Logging framework is controlled by a global
# "format_as" option and a global "backtrace" option.
#
# The format_as option allows objects to be converted to a string using the
# standard "to_s" method, the "inspect" method, the "to_json" method, or the
# "to_yaml" method (this is independent of the YAML layout). The format_as
# option can be overridden by each layout as desired.
#
# Logging.format_as :string # or :inspect or :json or :yaml
#
# Exceptions are treated differently by the logging framework. The Exception
# class is printed along with the message. Optionally, the exception backtrace
# can be included in the logging output; this option is enabled by default.
#
# Logging.backtrace false
#
# The backtrace can be enabled or disabled for each layout as needed.
#
require 'logging'
Logging.format_as :inspect
Logging.backtrace false
Logging.appenders.stdout(
:layout => Logging.layouts.basic(:format_as => :yaml)
)
Logging.appenders.stderr(
:layout => Logging.layouts.basic(:backtrace => true)
)
log = Logging.logger['foo']
log.appenders = %w[stdout stderr]
# these log messages will all appear twice because of the two appenders -
# STDOUT and STDERR - but the interesting thing is the difference in the
# output
log.info %w[An Array Of Strings]
log.info({"one"=>1, "two"=>2})
begin
1 / 0
rescue => err
log.error err
end
# :startdoc:
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