[kepler-users] branch the workflow

[Christopher Brooks]

Hi Hao,
See:
http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII8.0/ptII/doc/codeDoc/ptolemy/backtrack/automatic/ptolemy/actor/lib/BooleanSwitch.html

"Note that the this actor may be used in Synchronous Dataflow (SDF) models, but only under certain circumstances. Specifically, downstream actors will be fired whether a token is sent to them or not. 
This will only work if the downstream actors specifically check to see whether input tokens are available."

Models that have branches that can change during execution are
not usually SDF because the number of tokens can change during
execution.  SDF statically schedules the firing of tokens
depending on the number of tokens produced or consumed.

Try using DDF.

Try searching the net and groups for BooleanSwitch, see
https://kepler-project.org/users/faq#the-booleanswitch-actor-is

_Christopher

On 2/10/11 12:46 PM, Hao Qian wrote:
> Hi,
>
> Under the SDF director, how to branch the workflow according to some condition, like an “if – else –“ statement? There is a “Boolean Switch” actor, but the document says it cannot be used under SDF
> director.
>
> Thanks!
>
> Hao
>
>
>
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-- 
Christopher Brooks, PMP                       University of California
CHESS Executive Director                      US Mail: 337 Cory Hall
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