Inspired by the buffered logger idea by Ezra

Namespace
Methods
A
B
C
F
N
S
Included Modules
Constants
MAX_BUFFER_SIZE = 1000
 
Attributes
[R] auto_flushing
[RW] level
Class Public methods
new(log, level = DEBUG)
# File activesupport/lib/active_support/buffered_logger.rb, line 41
def initialize(log, level = DEBUG)
  @level         = level
  @buffer        = {}
  @auto_flushing = 1
  @guard = Mutex.new
  if log.respond_to?(:write)
    @log = log
  elsif File.exist?(log)
    @log = open(log, (File::WRONLY | File::APPEND))
    @log.sync = true
  else
    FileUtils.mkdir_p(File.dirname(log))
    @log = open(log, (File::WRONLY | File::APPEND | File::CREAT))
    @log.sync = true
    @log.write("# Logfile created on %s" % [Time.now.to_s])
  end
end
silencer

Set to false to disable the silencer

# File activesupport/lib/active_support/buffered_logger.rb, line 21
cattr_accessor :silencer
Instance Public methods
add(severity, message = nil, progname = nil, &block)
# File activesupport/lib/active_support/buffered_logger.rb, line 60
def add(severity, message = nil, progname = nil, &block)
  return if @level > severity
  message = (message || (block && block.call) || progname).to_s
  # If a newline is necessary then create a new message ending with a newline.
  # Ensures that the original message is not mutated.
  message = "#{message}\n" unless message[-1] == \n
  buffer << message
  auto_flush
  message
end
auto_flushing=(period)

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.

# File activesupport/lib/active_support/buffered_logger.rb, line 87
def auto_flushing=(period)
  @auto_flushing =
    case period
    when true;                1
    when false, nil, 0;       MAX_BUFFER_SIZE
    when Integer;             period
    else raise ArgumentError, "Unrecognized auto_flushing period: #{period.inspect}"
    end
end
close()
# File activesupport/lib/active_support/buffered_logger.rb, line 110
def close
  flush
  @log.close if @log.respond_to?(:close)
  @log = nil
end
flush()
# File activesupport/lib/active_support/buffered_logger.rb, line 97
def flush
  @guard.synchronize do
    unless buffer.empty?
      old_buffer = buffer
      @log.write(old_buffer.join)
    end
    # Important to do this even if buffer was empty or else @buffer will
    # accumulate empty arrays for each request where nothing was logged.
    clear_buffer
  end
end
silence(temporary_level = ERROR)

Silences the logger for the duration of the block.

# File activesupport/lib/active_support/buffered_logger.rb, line 25
def silence(temporary_level = ERROR)
  if silencer
    begin
      old_logger_level, self.level = level, temporary_level
      yield self
    ensure
      self.level = old_logger_level
    end
  else
    yield self
  end
end
Instance Protected methods
auto_flush()
# File activesupport/lib/active_support/buffered_logger.rb, line 117
def auto_flush
  flush if buffer.size >= @auto_flushing
end
buffer()
# File activesupport/lib/active_support/buffered_logger.rb, line 121
def buffer
  @buffer[Thread.current] ||= []
end
clear_buffer()
# File activesupport/lib/active_support/buffered_logger.rb, line 125
def clear_buffer
  @buffer.delete(Thread.current)
end