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Versions: 6
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Contents
module Vedeu
# Ensures we can always write to the log file by creating a lock-less
# log device.
#
class LocklessLogDevice < Logger::LogDevice
# Returns a new instance of Vedeu::LocklessLogDevice.
#
# @param log [void]
# @return [Vedeu::LocklessLogDevice]
def initialize(log = nil)
@dev = nil
@filename = nil
if log.respond_to?(:write) && log.respond_to?(:close)
@dev = log
else
@dev = open_logfile(log)
@dev.sync = true
@filename = log
end
end
# @param message [String]
# @return [void]
def write(message)
@dev.write(message)
rescue StandardError => exception
warn("log writing failed. #{exception}")
end
# @return [void]
def close
@dev.close
rescue
nil
end
private
# @param log [String]
# @return [void]
def open_logfile(log)
if FileTest.exist?(log)
open(log, (File::WRONLY | File::APPEND))
else
logdev = open(log, (File::WRONLY | File::APPEND | File::CREAT))
logdev.sync = true
logdev
end
end
end # LocklessLogDevice
end # Vedeu
Version data entries
6 entries across 6 versions & 1 rubygems