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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero 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/>.
import os
import sys
from paste.deploy.converters import asbool, asint, aslist
KNOWN_CONFIG_BOOLS = [
'CELERY_RESULT_PERSISTENT',
'CELERY_CREATE_MISSING_QUEUES',
'BROKER_USE_SSL', 'BROKER_CONNECTION_RETRY',
'CELERY_ALWAYS_EAGER', 'CELERY_EAGER_PROPAGATES_EXCEPTIONS',
'CELERY_IGNORE_RESULT', 'CELERY_TRACK_STARTED',
'CELERY_DISABLE_RATE_LIMITS', 'CELERY_ACKS_LATE',
'CELERY_STORE_ERRORS_EVEN_IF_IGNORED',
'CELERY_SEND_TASK_ERROR_EMAILS',
'CELERY_SEND_EVENTS', 'CELERY_SEND_TASK_SENT_EVENT',
'CELERYD_LOG_COLOR', 'CELERY_REDIRECT_STDOUTS',
]
KNOWN_CONFIG_INTS = [
'CELERYD_CONCURRENCY',
'CELERYD_PREFETCH_MULTIPLIER',
'CELERY_AMQP_TASK_RESULT_EXPIRES',
'CELERY_AMQP_TASK_RESULT_CONNECTION_MAX',
'REDIS_PORT', 'REDIS_DB',
'BROKER_PORT', 'BROKER_CONNECTION_TIMEOUT',
'CELERY_BROKER_CONNECTION_MAX_RETRIES',
'CELERY_TASK_RESULT_EXPIRES', 'CELERY_MAX_CACHED_RESULTS',
'CELERY_DEFAULT_RATE_LIMIT', # ??
'CELERYD_MAX_TASKS_PER_CHILD', 'CELERYD_TASK_TIME_LIMIT',
'CELERYD_TASK_SOFT_TIME_LIMIT',
'MAIL_PORT', 'CELERYBEAT_MAX_LOOP_INTERVAL',
]
KNOWN_CONFIG_FLOATS = [
'CELERYD_ETA_SCHEDULER_PRECISION',
]
KNOWN_CONFIG_LISTS = [
'CELERY_ROUTES', 'CELERY_IMPORTS',
]
## Needs special processing:
# ADMINS, ???
# there are a lot more; we should list here or process specially.
def asfloat(obj):
try:
return float(obj)
except (TypeError, ValueError), e:
raise ValueError(
"Bad float value: %r" % obj)
MANDATORY_CELERY_IMPORTS = ['mediagoblin.process_media']
DEFAULT_SETTINGS_MODULE = 'mediagoblin.celery_setup.dummy_settings_module'
def setup_celery_from_config(app_config, global_config,
settings_module=DEFAULT_SETTINGS_MODULE,
force_celery_always_eager=False,
set_environ=True):
"""
Take a mediagoblin app config and the global config from a paste
factory and try to set up a celery settings module from this.
Args:
- app_config: the application config section
- global_config: the entire paste config, all sections
- settings_module: the module to populate, as a string
-
- set_environ: if set, this will CELERY_CONFIG_MODULE to the
settings_module
"""
if asbool(app_config.get('use_celery_environment_var')) == True:
# Don't setup celery based on our config file.
return
celery_conf_section = app_config.get('celery_section', 'celery')
if global_config.has_key(celery_conf_section):
celery_conf = global_config[celery_conf_section]
else:
celery_conf = {}
celery_settings = {}
# set up mongodb stuff
celery_settings['CELERY_RESULT_BACKEND'] = 'mongodb'
if not celery_settings.has_key('BROKER_BACKEND'):
celery_settings['BROKER_BACKEND'] = 'mongodb'
celery_mongo_settings = {}
if app_config.has_key('db_host'):
celery_mongo_settings['host'] = app_config['db_host']
if celery_settings['BROKER_BACKEND'] == 'mongodb':
celery_settings['BROKER_HOST'] = app_config['db_host']
if app_config.has_key('db_port'):
celery_mongo_settings['port'] = asint(app_config['db_port'])
if celery_settings['BROKER_BACKEND'] == 'mongodb':
celery_settings['BROKER_PORT'] = asint(app_config['db_port'])
celery_mongo_settings['database'] = app_config.get('db_name', 'mediagoblin')
celery_settings['CELERY_MONGODB_BACKEND_SETTINGS'] = celery_mongo_settings
# Add anything else
for key, value in celery_conf.iteritems():
key = key.upper()
if key in KNOWN_CONFIG_BOOLS:
value = asbool(value)
elif key in KNOWN_CONFIG_INTS:
value = asint(value)
elif key in KNOWN_CONFIG_FLOATS:
value = asfloat(value)
elif key in KNOWN_CONFIG_LISTS:
value = aslist(value)
celery_settings[key] = value
# add mandatory celery imports
celery_imports = celery_settings.setdefault('CELERY_IMPORTS', [])
celery_imports.extend(MANDATORY_CELERY_IMPORTS)
if force_celery_always_eager:
celery_settings['CELERY_ALWAYS_EAGER'] = True
celery_settings['CELERY_EAGER_PROPAGATES_EXCEPTIONS'] = True
__import__(settings_module)
this_module = sys.modules[settings_module]
for key, value in celery_settings.iteritems():
setattr(this_module, key, value)
if set_environ:
os.environ['CELERY_CONFIG_MODULE'] = settings_module
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