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From Richard Eckart de Castilho <...@apache.org>
Subject Re: Error when trying to drop CAS with FlowController
Date Sun, 06 Sep 2015 13:59:49 GMT
Hi Eddie,

ok, but why can input CASes created outside the aggregate not be dropped?


-- Richard

On 06.09.2015, at 15:58, Eddie Epstein <eaepstein@gmail.com> wrote:

> Hi Torsten,
> The documentation says ...
> public FinalStep(boolean aForceCasToBeDropped)
>   Creates a new FinalStep, and may indicate that a CAS should be dropped.
>   This can only be used for CASes that are produced internally to the
> aggregate.
>   It is an error to attempt to drop a CAS that was passed as input to the
> aggregate.
> The error must be because the drop is being applied to a CAS passed into the
> aggregate from the outside, not created by a CasMultiplier inside the
> aggregate.
> Eddie
> On Wed, Sep 2, 2015 at 4:22 PM, Zesch, Torsten <torsten.zesch@uni-due.de>
> wrote:
>> Hi all,
>> I'm trying to implement a FlowController that drops CASes matching certain
>> critera. The FlowController is defined on an inner AAE which sets
>> casproduced to true. The inner AAE resides in an outer AAE which contains
>> additional processing before and after the inner AAE.
>> Reader -> Outer AAE { ProcŠ Inner AAE { FlowController } ProcŠ Consumer}
>> The aggregate receives various input CASes and is supposed to drop some
>> but not others. When I try to drop a CAS in my FlowController now, I get
>> the error
>> Caused by: org.apache.uima.analysis_engine.AnalysisEngineProcessException:
>> The FlowController attempted to drop a CAS that was passed as input to the
>> Aggregate AnalysisEngine containing that FlowController.  The only CASes
>> that may be dropped are those that are created within the same Aggregate
>> AnalysisEngine as the FlowController.
>> How can I drop CASes using a FlowController such that they do not proceed
>> in the outer aggregate?
>> thanks,
>> Torsten

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