[erlang-questions] Elevator demo

Francesco Cesarini <>
Wed Jan 2 18:14:15 CET 2013


The Elevator example was implemented by Hakan Huss in the late 90s at 
Erlang Systems. It was part of the 5-day Erlang Literacy course aimed at 
test and support staff of the GPRS project. It has been used to 
demonstrate how Quick Check can test elevator systems, and featured in a 
few academic papers.

/F

On 31/12/2012 23:39, Loïc Hoguin wrote:
> Hello 2013,
>
> Just a quick link targeted mostly to people who teach Erlang or those 
> who want to demonstrate its features.
>
> Last September Scott gave me the code he had for an old Ericsson 
> elevator training application that shows an application with a bug, 
> and an upgrade available to perform a release upgrade to fix the bug 
> live. As these are elevators, the bug (doors opening at every floor) 
> can be quickly seen fixed since the elevators will continue moving 
> until their destination without the bug triggering anymore once you 
> did the upgrade.
>
> You can find the source here:
>
>   https://github.com/extend/elevators
>
> It should work for R15. Probably does for R14 too, but I didn't test it.
>
> As this is an old demo it uses gs, but I will port the code to wx for 
> R16 once it is released if nobody did it before.
>
> Patches are welcome. Also if you know more about the history behind 
> this application, I'm interested and will put these infos in the 
> README file.
>

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