Customizing logic for use by logger

its_all_just_about_the_view.rb

# Simple logger
logger = Logger.new(STDOUT)

# Some object
Foo = Struct.new(:hello, :goodbye)

foo = Foo.new
foo.hello = 'Hola'
foo.goodbye = 'Adiós'

# Unmodified 
logger.debug(foo)
logger.info(foo)

# Custom log view method
module LogView
  def inspect
    "HELLO=#{hello}, GOODBYE=#{goodbye}"
  end
end

# Extend the instance
foo.extend(LogView)

logger.debug(foo)
logger.info(foo)

# Reset
foo = nil

# Decorate the instance
class FooLogView < SimpleDelegator
  include LogView
end

foo = Foo.new
foo.hello = 'Bonjour'
foo.goodbye = 'Au Revoir'

flv = FooLogView.new(foo)

logger.debug(flv)
logger.info(flv)