还支持异步地分散读操作与写操作，该操作需要大量字节缓存。
Scattering reads and writes, which take an array of byte buffers, are also supported asynchronously.
应用程序消息通过一个简单的回调机制异步传递，并且只以字节数组有效负载的格式提供。
Application messages are delivered asynchronously through a simple callback mechanism and are provided only in byte array payload format.
异步等待读和字节块包处理问题。
Asynchronous pending reads and byte chunk package processing problem.
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