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require "logger"
require "mixlib/log/logging"
# A subclass of Ruby's stdlib Logger with all the mutex and logrotation stuff
# ripped out, and metadata added in.
module Mixlib
module Log
class Logger < ::Logger
include Logging
def trace?; @level <= TRACE; end
#
# === Synopsis
#
# Logger.new(name, shift_age = 7, shift_size = 1048576)
# Logger.new(name, shift_age = 'weekly')
#
# === Args
#
# +logdev+::
# The log device. This is a filename (String) or IO object (typically
# +$stdout+, +$stderr+, or an open file).
# +shift_age+::
# Number of old log files to keep, *or* frequency of rotation (+daily+,
# +weekly+ or +monthly+).
# +shift_size+::
# Maximum logfile size (only applies when +shift_age+ is a number).
#
# === Description
#
# Create an instance.
#
def initialize(logdev)
@progname = nil
@level = DEBUG
@default_formatter = Formatter.new
@formatter = nil
@logdev = nil
if logdev
@logdev = LocklessLogDevice.new(logdev)
end
end
def add_data(severity, message, progname, data: {})
return true if @logdev.nil? || severity < @level
data ||= {}
if message.is_a?(::Exception)
data[:err] = message
else
data[:msg] = message
end
@logdev.write(
format_message(to_label(severity), Time.now, progname, data)
)
true
end
alias_method :add, :add_data
class LocklessLogDevice < LogDevice
def initialize(log = nil)
@dev = @filename = @shift_age = @shift_size = nil
if log.respond_to?(:write) && log.respond_to?(:close)
@dev = log
else
@dev = open_logfile(log)
@filename = log
end
@dev.sync = true
end
def write(message)
@dev.write(message)
rescue Exception => ignored
warn("log writing failed. #{ignored}")
end
def close
@dev.close rescue nil
end
private
def open_logfile(filename)
if FileTest.exist?(filename)
open(filename, (File::WRONLY | File::APPEND))
else
create_logfile(filename)
end
end
def create_logfile(filename)
logdev = open(filename, (File::WRONLY | File::APPEND | File::CREAT))
add_log_header(logdev)
logdev
end
def add_log_header(file)
file.write(
"# Logfile created on %s by %s\n" % [Time.now.to_s, Logger::ProgName]
)
end
end
end
end
end
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