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From Richard Eckart de Castilho <...@apache.org>
Subject Re: Parallel Flow Controller?
Date Wed, 14 May 2014 08:59:04 GMT
I have occasionally noticed Marshall writing something about
parallel steps - maybe you can find something in the mailing
list archives of the developers or commits lists... e.g.

http://uima.markmail.org/thread/y3go5sswfvb7qkmz
http://uima.markmail.org/thread/qbrwrahcs4uwhmj5

-- Richard

[1] http://uima.apache.org/mail-lists.html (try Markmail)

On 13.05.2014, at 03:16, Petr Baudis <pasky@ucw.cz> wrote:

>  Hi!
> 
>  In my UIMA pipeline, at a few points I have a need for
> some AEs to be executed logically in parallel - in particular,
> I'd need this in case of a few CAS multipliers. If I understand
> things correctly, there is no way with the fixed flow controller
> to execute two CAS multipliers "in parallel", i.e. both using
> a single source CAS, dropping it and producing a bunch of new
> CASes.  I need to create a CAS processing graph like:
> 
>                .-> Multip0 -> A1 -> Multip1 -> A2 ->.
>  reader -> A0 <                                      > CASmerger
>                `-> Multip2 -> A3 ------------> A2 ->'
> 
>  My current aim would be enclosing each of the branches (up to A2)
> in an aggregate AE, and creating another aggregate AE that will
> consist of these two branch AEs, governed by a custom "parallel"
> flow controller that will ensure the input CAS is fed as input
> to both branches and the union of output CAS of both branches
> is sent out of the aggregate AE:
> 
>  Main: reader -> A0 -> AggregP -> A2 -> CASmerger
>  AggregP: Aggreg0, Aggreg1 (ParallelFlowController)
>  Aggreg0: Multip0 -> A1 -> Multip1
>  Aggreg1: Multip2 -> A3
> 
>  I'd just like to confirm whether noone implemented the parallel
> flow controller yet and if perhaps I'm not missing a simple existing
> solution to this problem.
> 
>  Kind regards,
> 
> 				Petr "Pasky" Baudis
> 


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