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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2012 Étienne Loks <etienne.loks_AT_peacefrogsDOTnet>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# See the file COPYING for details.
from django.conf import settings
if 'kombu.transport.django' in settings.INSTALLED_APPS \
and 'djcelery' in settings.INSTALLED_APPS:
from celery.decorators import task
from django.core.cache import cache
from django.core.exceptions import ObjectDoesNotExist
from django.utils.translation import ugettext_lazy as _
from chimere.models import Importer
from external_utils import OsmApi
def single_instance_task(timeout):
def task_exc(func):
def wrapper(*args, **kwargs):
return func(*args, **kwargs)
return wrapper
return task_exc
if 'task' in globals():
def single_instance_task(timeout):
def task_exc(func):
def wrapper(*args, **kwargs):
lock_id = "celery-single-instance-" + func.__name__
acquire_lock = lambda: cache.add(lock_id, "true", timeout)
release_lock = lambda: cache.delete(lock_id)
if acquire_lock():
try:
func(*args, **kwargs)
finally:
release_lock()
return wrapper
return task_exc
else:
def task():
def task_exc(func):
def wrapper(*args, **kwargs):
func(*args, **kwargs)
return wrapper
return task_exc
IMPORT_MESSAGES = {
'import_pending':[_(u"Import pending")],
'import_process':[_(u"Import processing")],
'import_done':[_(u"Import successfuly done"),
_(u" %(new)d new item(s), %(updated)d updated item(s)")],
'import_failed':[_(u"Import failed"), "%s"],
'import_cancel':[_(u"Import canceled")],
'export_pending':[_(u"Export pending")],
'export_process':[_(u"Export processing")],
'export_done':[_(u"Export successfuly done"),
_(u" %(updated)d updated item(s)")],
'export_failed':[_(u"Export failed"), "%s"],
'export_cancel':[_(u"Export canceled")]
}
@task()
def importing(importer_pk):
try:
importer = Importer.objects.get(pk=importer_pk)
except ObjectDoesNotExist:
# importer doesn't exists anymore: too late!
return
if importer.state != IMPORT_MESSAGES['import_pending'][0]:
# import canceled or done
return
importer.state = unicode(IMPORT_MESSAGES['import_process'][0])
importer.save()
new_item, updated_item, error = importer.manager.get()
importer.state = error + '\n' if error else ''
importer.state += unicode(IMPORT_MESSAGES['import_done'][0])
importer.state += u" - " \
+ unicode(IMPORT_MESSAGES['import_done'][1]) % {'new':new_item,
'updated':updated_item}
importer.state = importer.state
importer.save()
return True
@task()
@single_instance_task(60*10)
def exporting(importer_pk, extra_args=[]):
try:
importer = Importer.objects.get(pk=importer_pk)
except ObjectDoesNotExist:
# importer doesn't exists anymore: too late!
return
if importer.state != IMPORT_MESSAGES['export_pending'][0]:
# import canceled or done
return
importer.state = unicode(IMPORT_MESSAGES['export_process'][0])
importer.save()
error = None
try:
updated_item, error = importer.manager.put(extra_args)
except OsmApi.ApiError, error:
pass
if error:
importer.state = unicode(IMPORT_MESSAGES['export_failed'][0]) \
+ u" - " + unicode(IMPORT_MESSAGES['export_failed'][1]) % error
importer.save()
return
importer.state = unicode(IMPORT_MESSAGES['export_done'][0]) + u" - " \
+ unicode(IMPORT_MESSAGES['export_done'][1]) % {'updated':updated_item}
importer.save()
return True
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