Rails - Oct 2006 - Backgroundrb - how to pass a data file to worker from form

I am trying to initiate a background process with several parameters
including a CSV file.  Can anyone provide an example where a file is
used as input for the background worker?

Thanks,
Nathan


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On Oct 16, 2006, at 7:22 PM, Nathan Leach wrote:
>
> I am trying to initiate a background process with several parameters
> including a CSV file.  Can anyone provide an example where a file is
> used as input for the background worker?
>
> Thanks,
> Nathan

Nathan-


	I would suggest just sending the filename to the worker and have the  
worker open the file and deal with the contents.


-- Ezra Zygmuntowicz 
-- Lead Rails Architect
-- ez-NLltGlunAUd/unjJdyJNww@public.gmane.org
-- Engine Yard, Serious Rails Hosting
-- (866) 518-YARD (9273)



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Ezra,

Thanks for the tip.  The problem was that I was getting that "connection
refused" when trying to open the file for reading.  I found that passing
in the file contents as an array works.  Just wondering if there is a
better way.  I will look for ways around the connection error.

Also, as a follow up (if you don''t mind sharing), what is the preferred
method for ensuring that the background server is started/running at all
times?  The environment is Fedora Core 5.

Thanks!
Nathan

On Mon, 2006-10-16 at 19:27 -0700, Ezra Zygmuntowicz
wrote:
> 
> On Oct 16, 2006, at 7:22 PM, Nathan Leach wrote:
> 
> >
> > I am trying to initiate a background process with several parameters
> > including a CSV file.  Can anyone provide an example where a file is
> > used as input for the background worker?
> >
> > Thanks,
> > Nathan
> 
> 
> Nathan-
> 
> 
> 	I would suggest just sending the filename to the worker and have the  
> worker open the file and deal with the contents.
> 
> 
> -- Ezra Zygmuntowicz 
> -- Lead Rails Architect
> -- ez-NLltGlunAUd/unjJdyJNww@public.gmane.org
> -- Engine Yard, Serious Rails Hosting
> -- (866) 518-YARD (9273)
> 
> 
> 
> > 

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On Mon, 2006-10-16 at 22:54 -0400, Nathan Leach wrote:
> Ezra,
>
> Thanks for the tip.  The problem was that I was getting that
"connection
> refused" when trying to open the file for reading.  I found that
passing
> in the file contents as an array works.  Just wondering if there is a
> better way.  I will look for ways around the connection error.
>
> Also, as a follow up (if you don''t mind sharing), what is the
preferred
> method for ensuring that the background server is started/running at all
> times?  The environment is Fedora Core 5.
>
> Thanks!
> Nathan
>
> On Mon, 2006-10-16 at 19:27 -0700, Ezra Zygmuntowicz wrote:
> >
> > On Oct 16, 2006, at 7:22 PM, Nathan Leach wrote:
> >
> > >
> > > I am trying to initiate a background process with several
parameters
> > > including a CSV file.  Can anyone provide an example where a file
is
> > > used as input for the background worker?
> > >
> > > Thanks,
> > > Nathan
> >
> >
> > Nathan-
> >
> >
> > 	I would suggest just sending the filename to the worker and have the
> > worker open the file and deal with the contents.
> >
> >
> > -- Ezra Zygmuntowicz
> > -- Lead Rails Architect
> > -- ez-NLltGlunAUd/unjJdyJNww@public.gmane.org
> > -- Engine Yard, Serious Rails Hosting
> > -- (866) 518-YARD (9273)
> >
> >
> >
> > >
>
All,

I got this working using Ezra''s comments and the
''tempfile'' idea
suggested in "Ruby Cookbook".  Thought there might be others that want
to accomplish similar things.  I don''t want to clog the list, so
here''s
a summary...

The form handler controller passes the multi-part file data to a temp
file on the server file system, then passes the file dir/name to the
background worker process.  The worker re-reads the data and performs
the main work...in this case updating a Postgresql database with about
100k records.

If anyone wants details or code samples, please contact me off list.
Also, if there are suggestions for improvements I could make, please let
me know!

Thanks,
Nathan
>
> >

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