Grasp Controller, Does it really need a UI to exist?

Posted by dbones on Stack Overflow See other posts from Stack Overflow or by dbones
Published on 2010-03-29T19:55:04Z Indexed on 2010/03/29 20:13 UTC
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grasp

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object-oriented-design

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design-patterns

I have a Domain model which can be in multiple states, and if these states go out of a given range it the domain should automatically react.

For example I have a Car which is made of multiple things which have measurements

the Engine - Rev counter and Temperature

the Fuel Tank - capacity

Is is plaseable to have a CarStateController, which observses the engine and the tank, and if these states go out of range IE the engine temperature goes above range, turn the engine fan on??

There is no UI, (you could argue it would show a light on the dash board, but for this case it does not) is this a valid use of a GRASP controller pattern? if not what is this CarStateController Called?

Or have I completely missed the point and this should be the State Pattern?

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