require 'drb/drb'
require 'rinda/rinda'
def do_it(v)
puts "do_it(#{v})"
v + v
end
uri = ARGV.shift || raise("usage: #{$0} <server_uri>")
DRb.start_service
ts = Rinda::TupleSpaceProxy.new(DRbObject.new(nil, uri))
while true
r = ts.take(['sum', nil, nil])
v = do_it(r[2])
ts.write(['ans', r[1], r[2], v])
end