The EventMachine EventBus (herein, EMEB) provides a standard framework for the creation of evented message oriented applications utilizing the EventMachine framework. If you are familiar with the AMQP messaging system model, then EMEB will be very familiar to you. Note that while it borrows heavily from the AMQP object model it does not always adhere to the AMQP standard, so please do read the documentation even if you are very familiar with AMQP.

• Installation from RubyGems

  gem install emeb

• Installation using bundler (Gemfile)

  gem 'emeb'

A simple example follows (contained in a file called ~/example.rb):

EM.start do

  # EMEB::on is a shortcut method which binds a new anonymous queue the 
  # application default vhost on the application default topic exchange.
  EMEB.on :topic => 'amazing.stuff.*' do |event|
    puts "A most enjoyable experience: ' + event.data
  end

  with_data = 'event occurance'
  EMEB.publish :topic => 'amazing.stuff.here', :data => with_data

  with_data += ': sequalea'
  EMEB.publish :topic => 'even.more.amazing.stuff.here', :data => with_data

  EM.stop
end

Will yield the following output:

$> ruby example.rb
A most enjoyable experience: event occurance
$>