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require 'mono_logger/version'
require 'logger'
#== MonoLogger
# A subclass of Ruby's stdlib Logger with all the mutex and logrotation stuff
# ripped out.
class MonoLogger < Logger
#
# === Synopsis
#
# MonoLogger.new(STDOUT)
# MonoLogger.new(filename)
#
# === Args
#
# +logdev+::
# The log device. This is a filename (String) or IO object (typically
# +STDOUT+, +STDERR+, or an open file).
# +shift_age+::
# ignored in MonoLogger
# +shift_size+::
# ignored in MonoLogger
#
# === Description
#
# Create an instance.
#
def initialize(logdev, shift_age=nil, shift_size=nil)
super(nil)
if logdev
@logdev = LocklessLogDevice.new(logdev)
end
end
class LocklessLogDevice < LogDevice
def initialize(log = nil)
@dev = @filename = @shift_age = @shift_size = nil
if log.respond_to?(:write) and log.respond_to?(:close)
@dev = log
else
@dev = open_logfile(log)
@dev.sync = true
@filename = log
end
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))
logdev.sync = true
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
|
