AMPS异步服务器设计框架

AMPS一个中间件，它提供了一个框架，用于构建任何一个事件驱动的，异步处理的应用。与传统的基于线程的实现，AMPS允许单线程的方法，执行高并发应用程序。

AMPS is a middleware that provides a framework to write any software application as an event driven, asynchronous process . Unlike conventional thread based implementations, AMPS allows highly concurrent applications to run as a single thread of execution. 

AMPS实现要求，应用被设计成有限状态机的模型，状态的改变是基于事件的，每个状态的改变都要求有事件处理程序。一旦这样的设想，实现能提供多重好处。

AMPS implementations require that the application be modelled as a FSM (Finite State Machine) that changes state based on ‘events’. ‘Event handlers’ are written for each state change. Once envisioned in this way, implementations provide multiple benefits. 

本编程模型的好处有：

• 所有的执行都是不需要锁的。没有锁，没有互斥，不需要请求信号。
• 所有事件处理程序都是确定的。
• 自然支持对称多处理，非对称多处理和多核心系统。
• 程序是云就绪的.
• 没有线程间上下文切换或者等待锁的系统开销。
• 代码是在线程所产生的耦合效应应用的深入细微的错误自由。
• 代码避免了基于线程的应用由于深度耦合而产生的bug.

Some of the benefits of this programming model are:

• All execution is lock free. No locks, no mutexes, no semaphores required ever.
• All event handlers are deterministic
• Natural support for Symmetric multi-processing, Asymmetric multi processing and multi-core systems.
• Applications are cloud ready
• No system overhead in context switching between threads or waiting for locks.
• Code is free of subtle bugs arising out of deep coupling effects in thread based applications.