红帽全球峰会3.2. 运行 Hello World
Hello World 示例创建与代理的连接，发送一条包含问候语的消息到 examples 队列，然后重新接收它。成功后，它会将收到的消息打印到控制台。
更改到示例目录并运行 helloworld.rb 示例。
cd /usr/share/proton/examples/ruby/ ruby helloworld.rb amqp://127.0.0.1 examples Hello World!
$ cd /usr/share/proton/examples/ruby/
$ ruby helloworld.rb amqp://127.0.0.1 examples
Hello World!
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