有限状态机模式 - 唯一的真模式？ [英] Finite State Machine Pattern - The One True Pattern?

问题描述

都可能code写过提高通过采用状态机模式？

Could all Code ever written be improved by applying the State Machine Pattern?

我工作的一个项目，是可怕的可怕，越野车，碎面条code的质量。
我从这个博客复制 Martin Fowler的例子​​状态机code和转化的整个堆废话成一系列语句。
从字面上看只是一个状态，事件，转换和命令的列表。

I was working on a project that was a mass of horrendous awful, buggy, broken spaghetti code. I copied Martin Fowler's example State Machine code from this blog and transformed the whole heap of crap into a series of statements. Literally just a list of States, Events, Transitions and Commands.

我无法相信的转变。在code是现在干净，工作。当然，我知道之前状态机，并已实施，甚至他们
但在Martin Fowler的例子​​模型/配置的分离是惊人的。

I can't believe the transformation. The code is now clean, and works. Of course i was aware of State Machines before and have even implemented them but in the Martin Fowler example the separation of model/configuration is amazing.

这让我觉得，几乎所有我做过的这一做法某种程度上可以受惠。我想在我用每一种语言此功能。
也许这甚至应该是一个语言水平的功能。

This makes me think that almost everything i've ever done could have benefitted in some way from this approach. I want this functionality in every language i use. Maybe this should even be a language level feature.

有人认为这是错的？
或任何人有不同的模式有类似的经历？

Anyone think this is wrong? Or anyone have a similar experience with a different pattern?

推荐答案

有限状态机（FSM的），更具体地域专用语言（DSL的）更容易地匹配的问题的一个具体的解决方案的域，通过描述在溶液中一个专门的语言。

Finite state machines (FSM's) and more specifically domain specific languages (DSL's) make it easier to match a problem to one specific solution domain, by describing the solution in a specialised language.

状态机模式的局限在于，它本身就是一种编程语言，而是一个你必须写你自己的执行，测试和调试工具;一，任何维护者学习。您已经移动你的code的复杂性成为一个复杂的状态机的配置。有时，这是非常有用的，但肯定不是普遍的。

The limitations of the State Machine pattern is that it itself constitutes a programming language, but one for which you have to write your own execution, testing and debugging tools; and one which any maintainer has to learn. You have moved the complexity of your code into a complex FSM configuration. Occasionally, this is useful, but certainly not universally.

和因为任何冯·诺依曼计算机本身就是一个FSM，那么肯定任何程序的可以以这种方式重铸。

And since any von Neumann computer is itself a FSM, then certainly any program can be recast in this fashion.

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