#!/usr/bin/ruby.ruby2.2 

require 'optparse'
require 'rubygems'
require 'nats/client'

def usage
  puts "Usage: nats-pub <subject> <msg> [-s server]"; exit
end

args = ARGV.dup
opts_parser = OptionParser.new do |opts|
  opts.on('-s SERVER') { |server| $nats_server = server }
end
args = opts_parser.parse!(args)

subject, msg = args
usage unless subject
msg ||= 'Hello World'

NATS.on_error { |err| puts "Server Error: #{err}"; exit! }

NATS.start(:uri => $nats_server) do
  NATS.publish(subject, msg) { NATS.stop }
end

puts "Published [#{subject}] : '#{msg}'"
