Celluloid::ZMQ provides Celluloid actors that can interact with 0MQ sockets. Underneath, it's built on the ffi-rzmq library. Celluloid::ZMQ was primarily created for the purpose of writing DCell, distributed Celluloid over 0MQ, so before you go building your own distributed Celluloid systems with Celluloid::ZMQ, be sure to give DCell a look and decide if it fits your purposes.

It provides different Celluloid::ZMQ::Socket classes which can be initialized then sent bind or connect. Once bound or connected, the socket can read or send depending on whether it's readable or writable.

Celluloid::IO requires Ruby 1.9 support on all Ruby VMs. You will also need the ZeroMQ library installed as it's accessed via FFI.

Supported VMs are Ruby 1.9.3, JRuby 1.6, and Rubinius 2.0.

To use JRuby in 1.9 mode, you'll need to pass the "--1.9" command line option to the JRuby executable, or set the "JRUBY_OPTS=--1.9" environment variable.

The following 0MQ socket types are supported (see sockets.rb for more info)

• ReqSocket / RepSocket
• PushSocket / PullSocket
• PubSocket / SubSocket

require 'celluloid/zmq'

Celluloid::ZMQ.init

class Server
  include Celluloid::ZMQ

  def initialize(address)
    @socket = PullSocket.new

    begin
      @socket.bind(address)
    rescue IOError
      @socket.close
      raise
    end
  end

  def run
    loop { handle_message! @socket.read }
  end

  def handle_message(message)
    puts "got message: #{message}"
  end
end

class Client
  include Celluloid::ZMQ

  def initialize(address)
    @socket = PushSocket.new

    begin
      @socket.connect(address)
    rescue IOError
      @socket.close
      raise
    end
  end

  def write(message)
    @socket.send(message)

    nil
  end
end

addr = 'tcp://127.0.0.1:3435'

server = Server.new(addr)
client = Client.new(addr)

server.run!
client.write('hi')

Copyright (c) 2012 Tony Arcieri. See LICENSE.txt for further details.