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require 'thread'
require 'logger'
require 'active_support/core_ext/class/attribute_accessors'
require 'active_support/deprecation'
require 'fileutils'
module ActiveSupport
# Inspired by the buffered logger idea by Ezra
class BufferedLogger
module Severity
DEBUG = 0
INFO = 1
WARN = 2
ERROR = 3
FATAL = 4
UNKNOWN = 5
end
include Severity
MAX_BUFFER_SIZE = 1000
##
# :singleton-method:
# Set to false to disable the silencer
cattr_accessor :silencer
self.silencer = true
# Silences the logger for the duration of the block.
def silence(temporary_level = ERROR)
if silencer
begin
logger = self.class.new @log_dest, temporary_level
yield logger
ensure
logger.close
end
else
yield self
end
end
deprecate :silence
attr_reader :auto_flushing
deprecate :auto_flushing
def initialize(log, level = DEBUG)
@level = level
@log_dest = log
unless log.respond_to?(:write)
unless File.exist?(File.dirname(log))
ActiveSupport::Deprecation.warn(<<-eowarn)
Automatic directory creation for '#{log}' is deprecated. Please make sure the directory for your log file exists before creating the logger.
eowarn
FileUtils.mkdir_p(File.dirname(log))
end
end
@log = open_logfile log
end
def open_log(log, mode)
open(log, mode).tap do |open_log|
open_log.set_encoding(Encoding::BINARY) if open_log.respond_to?(:set_encoding)
open_log.sync = true
end
end
deprecate :open_log
def level
@log.level
end
def level=(l)
@log.level = l
end
def add(severity, message = nil, progname = nil, &block)
@log.add(severity, message, progname, &block)
end
# Dynamically add methods such as:
# def info
# def warn
# def debug
Severity.constants.each do |severity|
class_eval <<-EOT, __FILE__, __LINE__ + 1
def #{severity.downcase}(message = nil, progname = nil, &block) # def debug(message = nil, progname = nil, &block)
add(#{severity}, message, progname, &block) # add(DEBUG, message, progname, &block)
end # end
def #{severity.downcase}? # def debug?
#{severity} >= level # DEBUG >= @level
end # end
EOT
end
# Set the auto-flush period. Set to true to flush after every log message,
# to an integer to flush every N messages, or to false, nil, or zero to
# never auto-flush. If you turn auto-flushing off, be sure to regularly
# flush the log yourself -- it will eat up memory until you do.
def auto_flushing=(period)
end
deprecate :auto_flushing=
def flush
end
deprecate :flush
def respond_to?(method, include_private = false)
return false if method.to_s == "flush"
super
end
def close
@log.close
end
private
def open_logfile(log)
Logger.new log
end
end
end
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