[Haskell-cafe] ANN: Buster 0.99.1, a library for application orchestration that is not FRP

Jeff Heard jefferson.r.heard at gmail.com
Thu Apr 2 10:06:19 EDT 2009

Check links...  god.  http://vis.renci.org/jeff/buster  (can you tell
I was up till 3am last night?)

On Thu, Apr 2, 2009 at 10:05 AM, Jeff Heard <jefferson.r.heard at gmail.com> wrote:
> Yes,sorry.  vis, not vs. http://vis.renci.org/buster
> It is a bit like grapefruit's circuits, but where Grapefruit circuits
> describe the flow of events from place to place, Buster never does.
> Events exist for all behaviours, to be selected by name, group, or
> source.  The other major difference is the |~| or "beside" operator,
> which describes concurrent application of behaviours.
> A last but somewhat minor thing is that the Event type is fairly
> general, allowing for multiple data to be attached to a single event
> and this data to be of many of the standard types (Int, String,
> Double, ByteString, etc) as well as a user-defined type.  Of course,
> such an event type could be defined for other FRP frameworks as well.
> -- Jeff
> On Thu, Apr 2, 2009 at 9:53 AM, minh thu <noteed at gmail.com> wrote:
>> It's vis instead of vs:
>> http://vis.renci.org/jeff/buster/
>> 2009/4/2 Peter Verswyvelen <bugfact at gmail.com>:
>>> Sounds vaguely like Grapefruit's circuits, but I could be very wrong...
>>> The link you provided seems to be broken?
>>> On Thu, Apr 2, 2009 at 3:05 PM, Jeff Heard <jefferson.r.heard at gmail.com>
>>> wrote:
>>>> Read more about it on its webpage: http://vs.renci.org/jeff/buster
>>>> Yes, it’s to solve a particular problem.  And yes, this is a rough
>>>> draft of an explanation of how it works.  I’ve not even really
>>>> solidified the vocabulary yet, but I have this module which couches a
>>>> large, abstract, interactive (both with the user and the system),
>>>> multicomponent application in terms of a bus, inputs, behaviours, and
>>>> events.
>>>>    * Time is continuous and infinite.
>>>>    * An event is a static, discrete item associated with a particular
>>>> time.
>>>>    * The bus is the discrete view of event in time at an instant.
>>>>    * A widget is an IO action that assigns events to a particular
>>>> time based only upon sampling the outside world (other events and
>>>> behaviours are irrelevant to it).  e.g. a Gtk Button is a widget, a
>>>> readable network socket is an widget, the mouse is an widget, the
>>>> keyboard is an widget, a multitouch gesture engine is a widget.
>>>>    * A behaviour is a continuous item — it exists for the entire
>>>> program and for all times — which maps events on the bus to other
>>>> events on the bus.  It is an IO action as well — where widgets only
>>>> sample the outside world and are in a sense read only, behaviours
>>>> encapsulate reading and writing.
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