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References: 
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Date: Fri, 9 Jul 2010 07:08:57 -0400
Message-ID: <AANLkTilDp75s2sJSzr5uK7Yccor9H7gGFc4A5lQ8hB-A@mail.gmail.com>
Subject: Re: Process an aggregate with CAS multiplier and merger
From: Eddie Epstein <eaepstein@gmail.com>
To: user@uima.apache.org
Content-Type: text/plain; charset=ISO-8859-1

The CPE has no support for components returning new CASes. No need for
a CPE, just put the collection reader inside the aggregate too.

Eddie

On Fri, Jul 9, 2010 at 5:10 AM, Torsten Zesch
<zesch@tk.informatik.tu-darmstadt.de> wrote:
> Hi,
>
> I have a situation in which I want to split a document into several CASes, do some processing, and then merge the results back into a single result CAS.
>
> I implemented a CAS multiplier and a CAS merger that I put into an aggregate with a FixedFlow, setting ActionAfterCasMultiplier to "drop" and setting outputsNewCASes to "true" for the aggregate.
> This should drop the source CAS and let the merged CAS be output by the aggregate.
>
> Now, if I run that aggregate in an CPE and put the consumer behind the aggregate,
> => Reader + Aggregate[Multiply-Process-Merge] + Consumer
> the consumer only sees the source CAS.
>
> However, if I put the consumer inside the Aggregate,
> => Reader + Aggregate[Multiply-Process-Merge-Consumer]
> the output is correct.
> This means the mergedCAS is correctly created, but it is not available after the aggregate.
>
> Do I need to always put everything inside one big aggregate, or is there some way to also run pipelines like
> => Reader + Process + Aggregate[Multiply-Process-Merge] + Process + Consumer
>
> Thanks,
> Torsten
>