76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
# Copyright 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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from oslo_messaging._drivers.zmq_driver.poller import green_poller
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from oslo_messaging._drivers.zmq_driver.poller import threading_poller
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from oslo_messaging._i18n import _, _LE
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from oslo_utils import importutils
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LOG = logging.getLogger(__name__)
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# Map zmq_concurrency config option names to the actual module name.
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ZMQ_MODULES = {
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'native': 'zmq',
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'eventlet': 'eventlet.green.zmq',
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}
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def import_zmq(zmq_concurrency='eventlet'):
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_raise_error_if_invalid_config_value(zmq_concurrency)
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imported_zmq = importutils.try_import(ZMQ_MODULES[zmq_concurrency],
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default='zmq')
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if imported_zmq is None:
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errmsg = _LE("ZeroMQ not found!")
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LOG.error(_LE("ZeroMQ not found!"))
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raise ImportError(errmsg)
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return imported_zmq
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def get_poller(zmq_concurrency='eventlet'):
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_raise_error_if_invalid_config_value(zmq_concurrency)
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if zmq_concurrency == 'eventlet' and _is_eventlet_zmq_available():
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return green_poller.GreenPoller()
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return threading_poller.ThreadingPoller()
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def get_reply_poller(zmq_concurrency='eventlet'):
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_raise_error_if_invalid_config_value(zmq_concurrency)
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if zmq_concurrency == 'eventlet' and _is_eventlet_zmq_available():
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return green_poller.HoldReplyPoller()
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return threading_poller.ThreadingPoller()
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def get_executor(method, zmq_concurrency='eventlet'):
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_raise_error_if_invalid_config_value(zmq_concurrency)
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if zmq_concurrency == 'eventlet' and _is_eventlet_zmq_available():
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return green_poller.GreenExecutor(method)
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return threading_poller.ThreadingExecutor(method)
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def _is_eventlet_zmq_available():
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return importutils.try_import('eventlet.green.zmq')
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def _raise_error_if_invalid_config_value(zmq_concurrency):
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if zmq_concurrency not in ZMQ_MODULES:
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errmsg = _('Invalid zmq_concurrency value: %s')
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raise ValueError(errmsg % zmq_concurrency)
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