event_emitter

Install

% gem install event_emitter

load rubygem

require "rubygems"
require "event_emitter"

include

class User
  include EventEmitter
  attr_accessor :name
end

regist event listener

user = User.new
user.name = "shokai"
user.on :go do |data|
  puts "#{name} go to #{data[:place]}"
end

call event

user.emit :go, {:place => "mountain"}
# => "shokai go to mountain"

regist event using "once"

user.once :eat do |what, where|
  puts "#{name} -> eat #{what} at #{where}"
end

call

user.emit :eat, "BEEF", "zanmai"  # =>  "shokai -> eat BEEF at zanmai"
user.emit :eat, "Ramen", "marutomo"  # => do not call. call only first time.

apply as instance-specific method

class Foo
end

foo = Foo.new
EventEmitter.apply foo

remove event listener

user.remove_listener :go
user.remove_listener event_id

catch all events

user.on :* do |event_name, args|
  puts event_name + " called"
  p args
end

% gem install bundler
% bundle install
% rake test

% rake benchmark