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Contents
# encoding: utf-8
module TTY
# A class providing logging system
class Logger
include Equatable
ALL = 0
INFO = 1
DEBUG = 2
WARN = 3
ERROR = 4
FATAL = 5
OFF = 6
MAX_LEVELS = 7
attr_reader :namespace
attr_reader :level
attr_reader :output
attr_reader :timestamp_format
# Initialize a Logger
#
# @param [String] name
#
# @param [Hash] options
#
# @option options [String] :output
#
# @api public
def initialize(options = {})
@namespace = options.fetch(:namespace) do
fail ArgumentError, 'Logger must have namespace', caller
end
@output = options.fetch(:output) { $stderr }
@level = options.fetch(:level) { ALL }
@timestamp_format = options.fetch(:timestamp_format) { '%Y-%m-%d %T' }
end
def level=(level)
validate_level(level)
@level = level
end
# Create a timestamp
#
# @return [Time]
#
# @api public
def timestamp
Time.now.strftime(timestamp_format)
end
def validate_level(level)
return if valid_level?(level)
fail ArgumentError, "Log level must be 0..#{MAX_LEVELS}", caller
end
# Verify valid level
#
# @param [Number] level
# the level of this logger
#
# @return [Boolean]
#
# @api public
def self.valid_level?(level)
!level.nil? && level.is_a?(Numeric) && level >= ALL && level <= OFF
end
# Print formatted log to output
#
# @param [String] message
# the message to print to output
#
# @api public
def log(message)
output.print timestamp + ' - ' + message
end
end # Logger
end # TTY
Version data entries
10 entries across 10 versions & 1 rubygems