def pvw_start_session(request):
"""
pvw_start_session provide the inizialization of paraviewweb_xmlrpc.py process
"""
try:
if request.method == 'GET' and request.user.is_authenticated():
pvw_instance = None
try:
pvw_instance = ParaviewInstance.objects.get(user=request.user, deletion_time__exact=None)
if request.session[str(pvw_instance.pid)].poll() is None:
request.session[str(pvw_instance.pid)].kill()
request.session[str(pvw_instance.pid)].wait()
pvw_instance.deletion_time = datetime.now()
pvw_instance.save()
raise Exception
except Exception,e:
if pvw_instance is not None:
pvw_instance.deletion_time = datetime.now()
pvw_instance.save()
port = settings.PARAVIEWWEB_PORT + ParaviewInstance.objects.filter(deletion_time__isnull=True).count()
pvw_proces = subprocess.Popen(
[settings.PARAVIEW_PYTHON_BIN,
settings.PARAVIEWWEB_SERVER,
"-p "+str(port)],
#stdout=subprocess.PIPE, stderr=subprocess.PIPE
)
pvw_instance = ParaviewInstance(pid=pvw_proces.pid, port=port, user=request.user)
pvw_instance.save()
request.session[str(pvw_proces.pid)] = pvw_proces
pvw_render_connector = ServerProxy('http://127.0.0.1:%s/api' % pvw_instance.port)
#Wait that the process run.
while True:
try:
result = pvw_render_connector.ready()
break
except Exception, e:
pass
pass
return HttpResponse(content='TRUE')
