Wraps any standard Logger class to provide tagging capabilities. Examples:

Logger = ActiveSupport::TaggedLogging.new(Logger.new(STDOUT))
Logger.tagged("BCX") { Logger.info "Stuff" }                            # Logs "[BCX] Stuff"
Logger.tagged("BCX", "Jason") { Logger.info "Stuff" }                   # Logs "[BCX] [Jason] Stuff"
Logger.tagged("BCX") { Logger.tagged("Jason") { Logger.info "Stuff" } } # Logs "[BCX] [Jason] Stuff"

This is used by the default Rails.logger as configured by Railties to make it easy to stamp log lines with subdomains, request ids, and anything else to aid debugging of multi-user production applications.

Methods
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Class Public methods
new(logger)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 16
def initialize(logger)
  @logger = logger
end
Instance Public methods
add(severity, message = nil, progname = nil, &block)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 46
def add(severity, message = nil, progname = nil, &block)
  if message.nil?
    if block_given?
      message = block.call
    else
      message = progname
      progname = nil #No instance variable for this like Logger
    end
  end
  @logger.add(severity, "#{tags_text}#{message}", progname)
end
clear_tags!()

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 37
def clear_tags!
  current_tags.clear
end
flush()

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 66
def flush
  clear_tags!
  @logger.flush if @logger.respond_to?(:flush)
end
method_missing(method, *args)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 71
def method_missing(method, *args)
  @logger.send(method, *args)
end
pop_tags(size = 1)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 33
def pop_tags(size = 1)
  current_tags.pop size
end
push_tags(*tags)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 27
def push_tags(*tags)
  tags.flatten.reject(&:blank?).tap do |new_tags|
    current_tags.concat new_tags
  end
end
respond_to?(*args)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 76
def respond_to?(*args)
  super || @logger.respond_to?(*args)
end
respond_to_missing?(*args)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 80
def respond_to_missing?(*args)
  @logger.respond_to? *args
end
silence(temporary_level = Logger::ERROR, &block)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 41
def silence(temporary_level = Logger::ERROR, &block)
  @logger.silence(temporary_level, &block)
end
tagged(*tags)

Source: show | on GitHub 

# File activesupport/lib/active_support/tagged_logging.rb, line 20
def tagged(*tags)
  new_tags = push_tags(*tags)
  yield self
ensure
  pop_tags(new_tags.size)
end