Method: Logging::Layouts::Pattern::FormatMethodBuilder#handle_logger

Defined in:

lib/logging/layouts/pattern.rb

#handle_logger(format, directive, slice) ⇒ Object

Add the logger name to the format_string and the sprintf_args. The slice argument is a little interesting - this is the number of logger name segments to keep. If we have a logger named “Foo::Bar::Baz” and our slice is 2, then “Bar::Baz” will appear in the generated log message. So the slice selects the last two parts of the logger name.

format - format String directive - the directive character (‘c’) slice - the number of name segments to keep

Returns nil

# File 'lib/logging/layouts/pattern.rb', line 452

def handle_logger( format, directive, slice )
  fmt = format + 's'
  fmt = color_scheme.color(fmt, COLOR_ALIAS_TABLE[directive]) if colorize?

  format_string << fmt
  sprintf_args << DIRECTIVE_TABLE[directive].dup

  if slice
    numeric = Integer(slice) rescue nil
    if numeric
      raise ArgumentError, "logger name slice must be an integer greater than zero: #{numeric}" unless numeric > 0
      sprintf_args.last <<
          ".split(::Logging::Repository::PATH_DELIMITER)" \
          ".last(#{slice}).join(::Logging::Repository::PATH_DELIMITER)"
    else
      format_string << "{#{slice}}"
    end
  end

  nil
end