Multithreaded service in Ruby

#!/usr/bin/env ruby

#
# Multithreaded Hello World server
#

require 'rubygems'
require 'ffi-rzmq'

def worker_routine(context)
# Socket to talk to dispatcher
receiver = context.socket(ZMQ::REP)
receiver.connect("inproc://workers")

loop do
receiver.recv_string(string = '')
puts "Received request: [#{string}]"
# Do some 'work'
sleep(1)
# Send reply back to client
receiver.send_string("world")
end
end

context = ZMQ::Context.new

puts "Starting Hello World server…"

# socket to listen for clients
clients = context.socket(ZMQ::ROUTER)
clients.bind("tcp://*:5555")

# socket to talk to workers
workers = context.socket(ZMQ::DEALER)
workers.bind("inproc://workers")

# Launch pool of worker threads
5.times do
Thread.new{worker_routine(context)}
end

# Connect work threads to client threads via a queue
ZMQ::Device.new(ZMQ::QUEUE,clients,workers)