[kepler-users] String Feedback Loop

[Chad Berkley]

Hi Jim,

It seems like this should be possible and should work.  Could you send 
me your workflow so I can give it a try and see if I can find the problem?

thanks,
chad


Jim Amrhein wrote:
> Hi,
>    I'm trying to get a "string feedback loop" that involves multiple 
> actors, instead of normal single actor.
>    The test I'm trying to do is have a Loop Actor build a search string 
> based on Spatial region that gets executed in the Search Actor until we 
> either find results or the search region grows to be +-90,+-180. Any 
> results get sent back to the Loop Actor via an input String for 
> confirmation, before being forwarded to other actors for processing.
>    The Spatial region grows by 1 degree every iteration.
> 
>    The search Actor will aways return a String back to the Loop Actor's 
> input.
>    Which can either be "Found result" when a search is successful , or 
> "No Data" when a search fails.
> 
> But, I'm running into a various set of problems based on which Director 
> I try to  use:
> 
> When using a SDF Director I get the normal Error "Actors remain cannot 
> be scheduled!". I tried modify the SampleDelay actor to send "No Data", 
> but that didn't work and I'm not planning to use numerical values. 
> Eventually the "Found data" will be replaced with the actual Results found.
> ...          PN Director , I see the Ramp executed once (with a value of 
> "1"), then execution finishes, without any further output.
> ...          DDF Director , The code executes without any output (none 
> of the STDOUT messages I have get printed, even tho the loop completes)
>         
> Any suggestions would be appreciated.
> 
> Thanks,
>       JSA
> 
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