Speaking as one of those journeyman plumbers who have written fairly
complex pipelines without ever having the need to address commit levels
(wonderful default designs permit that!)...
> some task a stage might want to do before reading records that it needs

Perhaps checking that a downstream connection exists, perhaps even that a
TCPIP connection is complete and ready to accept messages, before reading
any records.  Why bother to read them if no one's listening?  Or, perform
syntax checking of the stage syntax.

Mike Walter
Hewitt Associates
Any opinions expressed herein are mine alone and do not necessarily
represent the opinions or policies of Hewitt Associates.




"Bob Cronin" <[EMAIL PROTECTED]>

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09/10/2007 08:27 AM
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Re: Should this pipe run






Nice, thanks for that. Could you give a simple example? That is, some task
a
stage might want to do before reading records that it needs to use a
pipeline to do? I promise to read the paper someday soon ;-)

On 9/10/07, Rob van der Heij <[EMAIL PROTECTED]> wrote:

> Normally a REXX stage only needs to bother with commit levels
> explicitly if it wants to use a pipeline to do the initialization (so
> before touching the records in the real pipeline).
>
> Rob
>




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