Loggable

Loggable is a gem that's designed to add a logging interface to classes that don't automatically support it.

This is a fork of vigetlabs/loggable with two minor changes:

1) It uses the Rails default logger if it's available

2) defaults to using STDOUT if you don't tell it otherwise

In short, it lets you set up a logger with _even less_ code than the vigetlabs logger.

Installation

Stable:

sudo gem install mediashelf-loggable

Usage

The Super Lazy Way

Using the Gem is super easy, just include the Logger module into any of your classes

require 'rubygems'
require 'loggable'

class MyClass
  include Loggable
end

Now, any class or instance methods have access to a logger:

class MyClass
  def self.do_something
    logger.debug 'doing something in the class'
  end

  def do_something
    logger.debug 'doing something in an instance'
  end
end

If this code is running within a Rails app that has RAILS_DEFAULT_LOGGER set up, it will use that. Otherwise, it will create a standard Ruby logger that prints to STDOUT.

When You Need More Control…

If you want to have more control (ie. you want to save logs to a file), you can manually assign a logger to your class:

require 'rubygems'
require 'logger'
require 'loggable'

class MyClass; end

MyClass.logger = Logger.new('debug.log')

Now, any class or instance methods have access to the logger:

class MyClass
  def self.do_something
    logger.debug 'doing something in the class'
  end

  def do_something
    logger.debug 'doing something in an instance'
  end
end

The above code will write into the log file when called:

MyClass.do_something
MyClass.new.do_something

debug.log:

D, [2008-04-24T20:37:32.273930 #25821] DEBUG -- : doing something in the class
D, [2008-04-24T20:37:32.274062 #25821] DEBUG -- : doing something in an instance

Removing Logger Functionality

Calling the logger= class method to assign a logger to the class will trigger the methods necessary to start logging messages. If you want to turn off logging temporarily (without removing the logging statements from your class), comment out the line where you assign the new logger. By default, the logger is stubbed out, so any calls to methods on it will just return nil.

Credits

Copyright © 2008 Patrick Reagan of Viget Labs (patrick.reagan@viget.com)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.