One way you could do it:
# in your model meth:
def generate_archive
was_success = false
...
fname = "#{dir}/#{title}.zip"
...
prev_fsize = 0
10.times do # or some reasonable(?) max num times.
sleep 0.5
begin fsize = File.size(fname); rescue; fsize = 0; end
if prev_fsize > 0 and prev_fsize == fsize
was_success = true
break
end
prev_fsize = fsize
end
return was_success
end
# and in your controller meth:
...
if @topic.generate_archive
send_file path, :type => 'application/zip'
else
# show some err msg ...
end
...
Note that the above assumes that the archiving process time (and
request volume) is short-enough from a user's wait-time perspective
(and app handle-ability). However if that process takes too long (and/
or req volume is too high), then you'll probably not want to continue
to test/wait for archiving process to complete before responding, but
instead return/redirect to a screen where the user (either app-driven
or the user-selected) tests/waits for the archiving process to
complete.
Jeff
On Apr 13, 4:13 pm, Carlos Santana <rails-mailing-l...@andreas-s.net>
wrote:
> Any help please?
>
> Thanks,
> CS.
>
>
>
> Carlos Santana wrote:
> > - How do I know when it is complete? Ideally, I would like to send zip
> > file once the process is complete rather than giving arbitrary sleep
> > time.
> > - Is it possible to get an estimate of this?
>
> > -
> > Thanks,
> > CS.
>
> > Frederick Cheung wrote:
> >> On 12 Apr 2009, at 05:26, Carlos Santana wrote:
> >>> thought above method wouldn't return until background jobs are
> >>> complete.
>
> >> If you want to wait for a process to complete you should be using
> >> Process.wait. Though if you're blocking on it like that what's the
> >> point of using fork ?
>
> >> Fred
>
> --
> Posted viahttp://www.ruby-forum.com/.
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