[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[LDM #TIR-641147]: Purpose of _BEGIN_ dummyprod for pqact ?

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [LDM #TIR-641147]: Purpose of _BEGIN_ dummyprod for pqact ?
  • Date: Tue, 27 Nov 2012 15:03:34 -0700
Hi Daryl,

> Curiousity kills my cat again.  I was finetooth combing some of my code
> today and ran into this situation:
> 
> ldmd.conf has:
> 
> EXEC    "pqact -f NIMAGE -v pyWWA/pqact-gini.conf"
> 
> my pyWWA/pqact-gini.conf has:
> 
> ###
> # Process GINI imagery through a customized python script, send the entire
> # pqact name to the decoder for logging purposes
> #
> # NIMAGE      ^(.*TIG(E|W|H|P|A)0. KNES.*)$
> NIMAGE        ^(.*)$
> PIPE  -close  /usr/bin/python pyWWA/gini2gis.py \1
> 
> When ldm fires up, this gets logged:
> 
> Nov 27 15:15:47 laptop pqact[11620] NOTE: Starting Up
> Nov 27 15:15:47 laptop pqact[11620] INFO: Successfully read
> configuration-file "/home/ldm/pyWWA/pqact-gini.conf"
> Nov 27 15:15:47 laptop pqact[11620] NOTE: Starting from insertion-time
> 2012-11-27 21:15:45.595316 UTC
> Nov 27 15:15:47 laptop pqact[11620] INFO: 20121127211545.595 TS_ENDT
> {{NIMAGE,  ".*"}}
> Nov 27 15:15:47 laptop pqact[11620] INFO:        0 20121127211547.786
> ANY 000  _BEGIN_
> Nov 27 15:15:47 laptop pqact[11620] INFO:                pipe:
> -close#011/usr/bin/python pyWWA/gini2gis.py _BEGIN_
> Nov 27 15:15:47 laptop pqact[11620] INFO: Deleting closed PIPE entry:
> pid=11625, cmd="-close /usr/bin/python pyWWA/gini2gis.py _BEGIN_"
> [filel.c:290]
> Nov 27 15:15:48 laptop pqact[11620] ERROR: child 11625 exited with status
> 1
> 
> So I am trying to understand this '_BEGIN_' dummpyprod.  Or course, I see
> where this is coming from in the source code, but I am not sure of the
> purpose.  Thanks for educating me again...

Before it begins regular processing of data-products, pqact(1) will process a 
product whose identifier is "_BEGIN_" -- providing there's a matching entry in 
its configuration-file.

It's a holdover from when pqact(1) was being developed.

> thanks!
> daryl
> 
> --
> /**
> * Daryl Herzmann
> * Assistant Scientist -- Iowa Environmental Mesonet
> * http://mesonet.agron.iastate.edu
> */

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: TIR-641147
Department: Support LDM
Priority: Normal
Status: Closed