Hello List,
So, my portal is almost done but then I got this problem.
The idea is to submit a file, analyse it, return a page with form to user to
set some parameters and then execute the main application (a program done in
python) in background. This was basically working with Plone/Zope, but then
our application now works only with python 2.5 and then we decided to use
django (and for others reasons that sounds clear now).
So what's happening then? I have this view:
def run_aria(request):
if not request.user.is_authenticated():
return HttpResponseRedirect('/accounts/login/')
if request.POST:
runAria(request)
return HttpResponseRedirect('/status')
else:
return HttpResponseRedirect('/jobs')
runAria() is a wrapper that will call our main application (toRunAria.py)
with this method:
jpid = spawn('nice',pythonCCPN,toRunAria,'round=%i' % round,
'switch_log=%i' % 1,\
'input_aria=%i' % input_aria, 'molecule=%s' % molecule,'spectra=%s' %
spectra,\
'hbonds=%s' % hbonds, 'dihedrals=%s' % dihedrals, 'distances=%s' %
distances,\
'rdcs=%s' % rdcs, 'jemail=%s' % jemail)
where:
def spawn(program, *args, **kw):
'''INTERNAL: Spawn a proccess in background (default) or not and return
PID'''
mode = kw.get("mode", os.P_NOWAIT)
#print mode, program, (program,) + args
return os.spawnvp(mode,program, (program,) + args)
So, when calling runAria(), my server doesn't move to return
HttpResponseRedirect('/status'), instead it remains showing the submitting
form page until my application (toRunAria.py) finishes and then it will show
the status page. But what happens is that toRunAria.py may take hours!
running, so that's why I was running it in background. However, it's not
frozen, since I can click in others links or enter the address
http://localhost:8000/status/ in the browser manually and see the current
status of the job.
It's just that return HttpResponseRedirect('/status') after runAria(request)
that is not doing what it was supposed to do.
Thus, my question, does anybody else have a suggestion, alternative, hint or
a say about it? I tried return render_to_response('status.html', {'user':
request.user}), but it's not OK either.
I hope you can understand my problem.
Many thanks in advance,
Alan
--
Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate
Department of Biochemistry, University of Cambridge.
80 Tennis Court Road, Cambridge CB2 1GA, UK.
>>http://www.bio.cam.ac.uk/~awd28<<
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