Re: alive e/ken style projects?

On Thu, Oct 15, 2015 at 4:55 PM, Tom Van Cutsem <[email protected]> wrote:

> 2015-10-15 9:51 GMT+02:00 Matt Rice <[email protected]>:
>
>> not sure that anybody has tried this sort of thing before, unreliable
>> promises seem a bit counter intuitive, though I haven't used promise
>> pipelining very much, the impression I get is that modeling
>> unreliability makes things weird...
>>
>
> Hi Matt,
>
> My PhD thesis largely revolved around marrying E's communicating event
> loops, far references and promise abstractions with the unreliable network
> conditions imposed by mobile ad hoc networks [1]. My experiments were done
> in a language called AmbientTalk [2]. One of the primary differences with E
> is that AmbientTalk's far references auto-buffer messages on network
> disconnect and will auto-reconnect when the network heals.
>
> This worked out well in our targeted environment because most network
> disconnects were assumed to be just temporary (e.g. due to intermittent
> wireless connectivity). Obviously this strategy doesn't deal with more
> permanent failures. We had various ways of dealing with that, such as
> expiration timeouts on the level of individual messages or leasing
> strategies on the level of far references. Promises associated with such
> messages or references would eventually get broken with an exception if the
> network partition remained.
>
> That said, AmbientTalk didn't implement promise pipelining the way E/CapTP
> did, so I can't speak to how one would marry such strategies with promise
> pipelining.
>

I'm not completely sure, but I think the AmbientTalk failure model is
orthogonal to promise pipelining. I can't think of a reason they can't be
combined. But no one has tried yet ;).



>
> Cheers,
> Tom
>
> [1]
> http://soft.vub.ac.be/~tvcutsem/talks/presentations/phd_tom_van_cutsem.pdf
> [2] https://code.google.com/p/ambienttalk/
>
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>
>


-- 
Text by me above is hereby placed in the public domain

  Cheers,
  --MarkM

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