celery: use just one instance of UNSET() object

rhodecode/lib/celerylib/loader.py

@@ -1,353 +1,356 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2020 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # 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 Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 """
 Celery loader, run with::
 
     celery worker \
         --task-events \
         --beat \
         --autoscale=20,2 \
         --max-tasks-per-child 1 \
         --app rhodecode.lib.celerylib.loader \
         --scheduler rhodecode.lib.celerylib.scheduler.RcScheduler \
         --loglevel DEBUG --ini=.dev/dev.ini
 """
 import os
 import logging
 import importlib
 
 from celery import Celery
 from celery import signals
 from celery import Task
 from celery import exceptions  # pragma: no cover
 from kombu.serialization import register
 
 import rhodecode
 
 from rhodecode.lib.statsd_client import StatsdClient
 from rhodecode.lib.celerylib.utils import parse_ini_vars, ping_db
 from rhodecode.lib.ext_json import json
 from rhodecode.lib.pyramid_utils import bootstrap, setup_logging
 from rhodecode.lib.utils2 import str2bool
 from rhodecode.model import meta
 
 
 register('json_ext', json.dumps, json.loads,
          content_type='application/x-json-ext',
          content_encoding='utf-8')
 
 log = logging.getLogger('celery.rhodecode.loader')
 
 
 imports = ['rhodecode.lib.celerylib.tasks']
 
 try:
     # try if we have EE tasks available
     importlib.import_module('rc_ee')
     imports.append('rc_ee.lib.celerylib.tasks')
 except ImportError:
     pass
 
 
 base_celery_config = {
     'result_backend': 'rpc://',
     'result_expires': 60 * 60 * 24,
     'result_persistent': True,
     'imports': imports,
     'worker_max_tasks_per_child': 20,
     'accept_content': ['json_ext', 'json'],
     'task_serializer': 'json_ext',
     'result_serializer': 'json_ext',
     'worker_hijack_root_logger': False,
     'database_table_names': {
         'task': 'beat_taskmeta',
         'group': 'beat_groupmeta',
     }
 }
 
 
 def add_preload_arguments(parser):
     parser.add_argument(
         '--ini', default=None,
         help='Path to ini configuration file.'
     )
     parser.add_argument(
         '--ini-var', default=None,
         help='Comma separated list of key=value to pass to ini.'
     )
 
 
 def get_logger(obj):
     custom_log = logging.getLogger(
         'rhodecode.task.{}'.format(obj.__class__.__name__))
 
     if rhodecode.CELERY_ENABLED:
         try:
             custom_log = obj.get_logger()
         except Exception:
             pass
 
     return custom_log
 
 
 # init main celery app
 celery_app = Celery()
 celery_app.user_options['preload'].add(add_preload_arguments)
 
 
 @signals.setup_logging.connect
 def setup_logging_callback(**kwargs):
     ini_file = celery_app.conf['RC_INI_FILE']
     setup_logging(ini_file)
 
 
 @signals.user_preload_options.connect
 def on_preload_parsed(options, **kwargs):
 
     ini_file = options['ini']
     ini_vars = options['ini_var']
 
     if ini_file is None:
         print('You must provide the --ini argument to start celery')
         exit(-1)
 
     options = None
     if ini_vars is not None:
         options = parse_ini_vars(ini_vars)
 
     celery_app.conf['RC_INI_FILE'] = ini_file
     celery_app.conf['RC_INI_OPTIONS'] = options
     setup_logging(ini_file)
 
 
 def _init_celery(app_type=''):
     from rhodecode.config.middleware import get_celery_config
 
     log.debug('Bootstrapping RhodeCode application for %s...', app_type)
 
     ini_file = celery_app.conf['RC_INI_FILE']
     options = celery_app.conf['RC_INI_OPTIONS']
 
     env = None
     try:
         env = bootstrap(ini_file, options=options)
     except Exception:
         log.exception('Failed to bootstrap RhodeCode APP')
 
     if not env:
         raise EnvironmentError(
             'Failed to load pyramid ENV. '
             'Probably there is another error present that prevents from running pyramid app')
 
     log.debug('Got Pyramid ENV: %s', env)
 
     celery_settings = get_celery_config(env['registry'].settings)
 
     setup_celery_app(
         app=env['app'], root=env['root'], request=env['request'],
         registry=env['registry'], closer=env['closer'],
         celery_settings=celery_settings)
 
 
 @signals.celeryd_init.connect
 def on_celeryd_init(sender=None, conf=None, **kwargs):
     _init_celery('celery worker')
 
     # fix the global flag even if it's disabled via .ini file because this
     # is a worker code that doesn't need this to be disabled.
     rhodecode.CELERY_ENABLED = True
 
 
 @signals.beat_init.connect
 def on_beat_init(sender=None, conf=None, **kwargs):
     _init_celery('celery beat')
 
 
 @signals.task_prerun.connect
 def task_prerun_signal(task_id, task, args, **kwargs):
     ping_db()
     statsd = StatsdClient.statsd
     if statsd:
         task_repr = getattr(task, 'name', task)
         statsd.incr('rhodecode_celery_task_total', tags=[
             'task:{}'.format(task_repr),
             'mode:async'
         ])
 
 
 @signals.task_success.connect
 def task_success_signal(result, **kwargs):
     meta.Session.commit()
     closer = celery_app.conf['PYRAMID_CLOSER']
     if closer:
         closer()
 
 
 
 @signals.task_retry.connect
 def task_retry_signal(
         request, reason, einfo, **kwargs):
     meta.Session.remove()
     closer = celery_app.conf['PYRAMID_CLOSER']
     if closer:
         closer()
 
 
 @signals.task_failure.connect
 def task_failure_signal(
         task_id, exception, args, kwargs, traceback, einfo, **kargs):
 
     log.error('Task: %s failed !! exc_info: %s', task_id, einfo)
     from rhodecode.lib.exc_tracking import store_exception
     from rhodecode.lib.statsd_client import StatsdClient
 
     meta.Session.remove()
 
     # simulate sys.exc_info()
     exc_info = (einfo.type, einfo.exception, einfo.tb)
     store_exception(id(exc_info), exc_info, prefix='rhodecode-celery')
     statsd = StatsdClient.statsd
     if statsd:
         exc_type = "{}.{}".format(einfo.__class__.__module__, einfo.__class__.__name__)
         statsd.incr('rhodecode_exception_total',
                     tags=["exc_source:celery", "type:{}".format(exc_type)])
 
     closer = celery_app.conf['PYRAMID_CLOSER']
     if closer:
         closer()
 
 
 @signals.task_revoked.connect
 def task_revoked_signal(
         request, terminated, signum, expired, **kwargs):
     closer = celery_app.conf['PYRAMID_CLOSER']
     if closer:
         closer()
 
 
 class UNSET(object):
     pass
 
 
-def set_celery_conf(app=UNSET(), root=UNSET(), request=UNSET(), registry=UNSET(), closer=UNSET()):
+_unset = UNSET()
+
+
+def set_celery_conf(app=_unset, root=_unset, request=_unset, registry=_unset, closer=_unset):
 
     if request is not UNSET:
         celery_app.conf.update({'PYRAMID_REQUEST': request})
 
     if registry is not UNSET:
         celery_app.conf.update({'PYRAMID_REGISTRY': registry})
 
 
 def setup_celery_app(app, root, request, registry, closer, celery_settings):
     log.debug('Got custom celery conf: %s', celery_settings)
     celery_config = base_celery_config
     celery_config.update({
         # store celerybeat scheduler db where the .ini file is
         'beat_schedule_filename': registry.settings['celerybeat-schedule.path'],
     })
 
     celery_config.update(celery_settings)
     celery_app.config_from_object(celery_config)
 
     celery_app.conf.update({'PYRAMID_APP': app})
     celery_app.conf.update({'PYRAMID_ROOT': root})
     celery_app.conf.update({'PYRAMID_REQUEST': request})
     celery_app.conf.update({'PYRAMID_REGISTRY': registry})
     celery_app.conf.update({'PYRAMID_CLOSER': closer})
 
 
 def configure_celery(config, celery_settings):
     """
     Helper that is called from our application creation logic. It gives
     connection info into running webapp and allows execution of tasks from
     RhodeCode itself
     """
     # store some globals into rhodecode
     rhodecode.CELERY_ENABLED = str2bool(
         config.registry.settings.get('use_celery'))
     if rhodecode.CELERY_ENABLED:
         log.info('Configuring celery based on `%s` settings', celery_settings)
         setup_celery_app(
             app=None, root=None, request=None, registry=config.registry,
             closer=None, celery_settings=celery_settings)
 
 
 def maybe_prepare_env(req):
     environ = {}
     try:
         environ.update({
             'PATH_INFO': req.environ['PATH_INFO'],
             'SCRIPT_NAME': req.environ['SCRIPT_NAME'],
             'HTTP_HOST': req.environ.get('HTTP_HOST', req.environ['SERVER_NAME']),
             'SERVER_NAME': req.environ['SERVER_NAME'],
             'SERVER_PORT': req.environ['SERVER_PORT'],
             'wsgi.url_scheme': req.environ['wsgi.url_scheme'],
         })
     except Exception:
         pass
 
     return environ
 
 
 class RequestContextTask(Task):
     """
     This is a celery task which will create a rhodecode app instance context
     for the task, patch pyramid with the original request
     that created the task and also add the user to the context.
     """
 
     def apply_async(self, args=None, kwargs=None, task_id=None, producer=None,
                     link=None, link_error=None, shadow=None, **options):
         """ queue the job to run (we are in web request context here) """
         from rhodecode.lib.base import get_ip_addr
 
         req = self.app.conf['PYRAMID_REQUEST']
         if not req:
             raise ValueError('celery_app.conf is having empty PYRAMID_REQUEST key')
 
         log.debug('Running Task with class: %s. Request Class: %s',
                   self.__class__, req.__class__)
 
         user_id = 0
 
         # web case
         if hasattr(req, 'user'):
             user_id = req.user.user_id
 
         # api case
         elif hasattr(req, 'rpc_user'):
             user_id = req.rpc_user.user_id
 
         # we hook into kwargs since it is the only way to pass our data to
         # the celery worker
         environ = maybe_prepare_env(req)
         options['headers'] = options.get('headers', {})
         options['headers'].update({
             'rhodecode_proxy_data': {
                 'environ': environ,
                 'auth_user': {
                     'ip_addr': get_ip_addr(req.environ),
                     'user_id': user_id
                 },
             }
         })
 
         return super(RequestContextTask, self).apply_async(
             args, kwargs, task_id, producer, link, link_error, shadow, **options)