Class: ActiveSupport::BufferedLogger

Inherits:
Object
  • Object
show all
Includes:
Severity
Defined in:
lib/active_support/buffered_logger.rb

Overview

Inspired by the buffered logger idea by Ezra

Defined Under Namespace

Modules: Severity

Constant Summary collapse

MAX_BUFFER_SIZE = 
1000

Constants included from Severity

Severity::DEBUG, Severity::ERROR, Severity::FATAL, Severity::INFO, Severity::UNKNOWN, Severity::WARN

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(log, level = DEBUG) ⇒ BufferedLogger

Returns a new instance of BufferedLogger.



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# File 'lib/active_support/buffered_logger.rb', line 38

def initialize(log, level = DEBUG)
  @level         = level
  @buffer        = []
  @auto_flushing = 1
  @no_block = false

  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

Instance Attribute Details

#auto_flushing ⇒ Object

Returns the value of attribute auto_flushing.



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# File 'lib/active_support/buffered_logger.rb', line 35

def auto_flushing
  @auto_flushing
end

#buffer ⇒ Object (readonly)

Returns the value of attribute buffer.



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# File 'lib/active_support/buffered_logger.rb', line 36

def buffer
  @buffer
end

#level ⇒ Object

Returns the value of attribute level.



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# File 'lib/active_support/buffered_logger.rb', line 34

def level
  @level
end

Instance Method Details

#add(severity, message = nil, progname = nil, &block) ⇒ Object 



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# File 'lib/active_support/buffered_logger.rb', line 63

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

#close ⇒ Object 



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# File 'lib/active_support/buffered_logger.rb', line 110

def close
  flush
  @log.close if @log.respond_to?(:close)
  @log = nil
end

#flush ⇒ Object 



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# File 'lib/active_support/buffered_logger.rb', line 100

def flush
  unless buffer.empty?
    if @no_block
      @log.write_nonblock(buffer.slice!(0..-1).join)
    else
      @log.write(buffer.slice!(0..-1).join)
    end
  end
end

#set_non_blocking_io ⇒ Object 



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# File 'lib/active_support/buffered_logger.rb', line 57

def set_non_blocking_io
  if !RUBY_PLATFORM.match(/java|mswin/) && !(@log == STDOUT) && @log.respond_to?(:write_nonblock)
    @no_block = true
  end
end

#silence(temporary_level = ERROR) ⇒ Object

Silences the logger for the duration of the block.



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# File 'lib/active_support/buffered_logger.rb', line 21

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