cln.rb

require 'rubygems'
gem 'msgpack'
gem 'msgpack-rpc'
require 'msgpack'
require 'msgpack/rpc'

port = 1985
cli = MessagePack::RPC::Client.new("127.0.0.1", port)
cli.timeout = 0.1

begin
  p cli.call(:hello0)
  p cli.call(:hello1, 1)
  p cli.call(:hello2, 1, 2)
rescue MessagePack::RPC::TimeoutError
  timeout = true
end

cli.close