Re: [stem-dev] Food Production

[James Kaufman <kaufman@xxxxxxxxxxxxxxx>]

I think the only question issue arrises
if you need the FoodConsumer to be integrable.
The transformation decorator was designed
to handle transformations that are by definition not integrable
but food consumption might be. 

Here is one other thought (but one with
big downsides).
Stefan suggested you use multipopulation
model to handle consumption.
A food consumption decorator could store
a MAP which knows at what rate different populations consume different
foods.
We probably want to handle consumption
of feed by farm animals as well as consumption of food by humans.
If the foodconsumption decorator does
not do the but simply stores the rates, then the population models could
handle the decay
in an integrable way (because population
models are integration decorators). The thing I do not like about this
idea is it then makes all
population models more complex and I
wanted to hide the complexity of food transformation in a separate transformation
decorator.

A second thought (also with downsides)
is to give the transformation decorator a flag to indicate whether or not
the transformation is
an integrable transformation. We would
then have to group any transformation decorators by integrability and so
we call transform at the 
right point in the iteration cycle.
This also has bid disadvantages (performance hit as a well as a lot of
complexity for the users - they need to
understand if the transformer can be
integrable).

The best approach may be Stefans suggestion.
What if we extend multi population model to a new class called "Food"
or "Food Population".
This could have different states, death=expiration,
and it could store  a map<Population>=Consumers with their consumption
rate. This might also be a
better representation of reality since
consumption is not really transformation. Consumption is integrable. Food
production is not.



Best Regards,
Jamie

IBM Almaden Research Center, 650 Harry Rd.
San Jose, CA 95120-6099
email: kaufman@xxxxxxxxxxxxxxx
phone: (408) 927-2477  (tie 457-2477)

From:	"Thoens Christian" <Christian.Thoens@xxxxxxxxxxx>
To:	<stem-dev@xxxxxxxxxxx>,
Date:	01/13/2012 03:04 AM
Subject:	[stem-dev] Hi all,
Sent by:	stem-dev-bounces@xxxxxxxxxxx

---

Hi all,

I would like to make some changes to the foodproduction plugin. A class
that allows consumption of food and disease transmission by consumption
should be created. My proposal for this is as follows.

abstract base class "FoodTransformer" (or maybe "FoodProcessor",
since
consumption does not transform food?)

a child of "FoodTransformer" called "FoodProducer"
(maybe abstract?):
same functionality as the old class "FoodProducer"

a child of "FoodProducer" called "DiseaseCarryingFoodProducer"
(or
maybe "Slaughterhouse"?): same functionality as the old class
"Slaughterhouse"

a child of "FoodTransformer" called "FoodConsumer":
provides
consumption of food and disease transmission by consumption

Does anyone have any suggestions for improvements?

Thanks,
Chris
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