/usr/lib/python3/dist-packages/celery/fixups/django.py is in python3-celery 3.1.13-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 | from __future__ import absolute_import
import io
import os
import sys
import warnings
from kombu.utils import cached_property, symbol_by_name
from datetime import datetime
from importlib import import_module
from celery import signals
from celery.exceptions import FixupWarning
__all__ = ['DjangoFixup', 'fixup']
ERR_NOT_INSTALLED = """\
Environment variable DJANGO_SETTINGS_MODULE is defined
but Django is not installed. Will not apply Django fixups!
"""
def _maybe_close_fd(fh):
try:
os.close(fh.fileno())
except (AttributeError, OSError, TypeError):
# TypeError added for celery#962
pass
def fixup(app, env='DJANGO_SETTINGS_MODULE'):
SETTINGS_MODULE = os.environ.get(env)
if SETTINGS_MODULE and 'django' not in app.loader_cls.lower():
try:
import django # noqa
except ImportError:
warnings.warn(FixupWarning(ERR_NOT_INSTALLED))
else:
return DjangoFixup(app).install()
class DjangoFixup(object):
def __init__(self, app):
self.app = app
self.app.set_default()
def install(self):
# Need to add project directory to path
sys.path.append(os.getcwd())
self.app.loader.now = self.now
self.app.loader.mail_admins = self.mail_admins
signals.worker_init.connect(self.on_worker_init)
return self
def on_worker_init(self, **kwargs):
# keep reference
self._worker_fixup = DjangoWorkerFixup(self.app).install()
def now(self, utc=False):
return datetime.utcnow() if utc else self._now()
def mail_admins(self, subject, body, fail_silently=False, **kwargs):
return self._mail_admins(subject, body, fail_silently=fail_silently)
@cached_property
def _mail_admins(self):
return symbol_by_name('django.core.mail:mail_admins')
@cached_property
def _now(self):
try:
return symbol_by_name('django.utils.timezone:now')
except (AttributeError, ImportError): # pre django-1.4
return datetime.now
class DjangoWorkerFixup(object):
_db_recycles = 0
def __init__(self, app):
self.app = app
self.db_reuse_max = self.app.conf.get('CELERY_DB_REUSE_MAX', None)
self._db = import_module('django.db')
self._cache = import_module('django.core.cache')
self._settings = symbol_by_name('django.conf:settings')
# Database-related exceptions.
DatabaseError = symbol_by_name('django.db:DatabaseError')
try:
import MySQLdb as mysql
_my_database_errors = (mysql.DatabaseError,
mysql.InterfaceError,
mysql.OperationalError)
except ImportError:
_my_database_errors = () # noqa
try:
import psycopg2 as pg
_pg_database_errors = (pg.DatabaseError,
pg.InterfaceError,
pg.OperationalError)
except ImportError:
_pg_database_errors = () # noqa
try:
import sqlite3
_lite_database_errors = (sqlite3.DatabaseError,
sqlite3.InterfaceError,
sqlite3.OperationalError)
except ImportError:
_lite_database_errors = () # noqa
try:
import cx_Oracle as oracle
_oracle_database_errors = (oracle.DatabaseError,
oracle.InterfaceError,
oracle.OperationalError)
except ImportError:
_oracle_database_errors = () # noqa
try:
self._close_old_connections = symbol_by_name(
'django.db:close_old_connections',
)
except (ImportError, AttributeError):
self._close_old_connections = None
self.database_errors = (
(DatabaseError, ) +
_my_database_errors +
_pg_database_errors +
_lite_database_errors +
_oracle_database_errors
)
def validate_models(self):
import django
try:
django.setup()
except AttributeError:
pass
s = io.StringIO()
try:
from django.core.management.validation import get_validation_errors
except ImportError:
from django.core.management.base import BaseCommand
cmd = BaseCommand()
cmd.stdout, cmd.stderr = sys.stdout, sys.stderr
cmd.check()
else:
num_errors = get_validation_errors(s, None)
if num_errors:
raise RuntimeError(
'One or more Django models did not validate:\n{0}'.format(
s.getvalue()))
def install(self):
signals.beat_embedded_init.connect(self.close_database)
signals.worker_ready.connect(self.on_worker_ready)
signals.task_prerun.connect(self.on_task_prerun)
signals.task_postrun.connect(self.on_task_postrun)
signals.worker_process_init.connect(self.on_worker_process_init)
self.validate_models()
self.close_database()
self.close_cache()
return self
def on_worker_process_init(self, **kwargs):
# the parent process may have established these,
# so need to close them.
# calling db.close() on some DB connections will cause
# the inherited DB conn to also get broken in the parent
# process so we need to remove it without triggering any
# network IO that close() might cause.
try:
for c in self._db.connections.all():
if c and c.connection:
_maybe_close_fd(c.connection)
except AttributeError:
if self._db.connection and self._db.connection.connection:
_maybe_close_fd(self._db.connection.connection)
# use the _ version to avoid DB_REUSE preventing the conn.close() call
self._close_database()
self.close_cache()
def on_task_prerun(self, sender, **kwargs):
"""Called before every task."""
if not getattr(sender.request, 'is_eager', False):
self.close_database()
def on_task_postrun(self, sender, **kwargs):
# See http://groups.google.com/group/django-users/
# browse_thread/thread/78200863d0c07c6d/
if not getattr(sender.request, 'is_eager', False):
self.close_database()
self.close_cache()
def close_database(self, **kwargs):
if self._close_old_connections:
return self._close_old_connections() # Django 1.6
if not self.db_reuse_max:
return self._close_database()
if self._db_recycles >= self.db_reuse_max * 2:
self._db_recycles = 0
self._close_database()
self._db_recycles += 1
def _close_database(self):
try:
funs = [conn.close for conn in self._db.connections]
except AttributeError:
if hasattr(self._db, 'close_old_connections'): # django 1.6
funs = [self._db.close_old_connections]
else:
# pre multidb, pending deprication in django 1.6
funs = [self._db.close_connection]
for close in funs:
try:
close()
except self.database_errors as exc:
str_exc = str(exc)
if 'closed' not in str_exc and 'not connected' not in str_exc:
raise
def close_cache(self):
try:
self._cache.cache.close()
except (TypeError, AttributeError):
pass
def on_worker_ready(self, **kwargs):
if self._settings.DEBUG:
warnings.warn('Using settings.DEBUG leads to a memory leak, never '
'use this setting in production environments!')
|