nats 是一個輕量級的云消息系統，使用 Ruby 開發。支持：

• MRI 1.8 and 1.9 (Performance is best on 1.9.3)
• Rubinius
• JRuby
</ul>

基本用法：

require "nats/client"

NATS.start do
Simple Subscriber
NATS.subscribe('foo') { |msg| puts "Msg received : '#{msg}'" }
Simple Publisher
NATS.publish('foo.bar.baz', 'Hello World!')
Unsubscribing
sid = NATS.subscribe('bar') { |msg| puts "Msg received : '#{msg}'" }
  NATS.unsubscribe(sid)
Requests
NATS.request('help') { |response| puts "Got a response: '#{response}'" }
Replies
NATS.subscribe('help') { |msg, reply| NATS.publish(reply, "I'll help!") }
Stop using NATS.stop, exits EM loop if NATS.start started the loop
NATS.stop
end</pre> 

項目主頁：http://www.baiduhome.net/lib/view/home/1382151689546