4bebf882d9
In this changeset, I implemented the notification_level parameter that allows you to set the level minimum level of notification to be emitted by Watcher. Partially Implements: blueprint watcher-notifications-ovo Change-Id: I78b30ceb3ee7606078a87beb3a4ce5d9568af1e0
156 lines
4.5 KiB
Python
156 lines
4.5 KiB
Python
# Copyright 2014 Red Hat, Inc.
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# All Rights Reserved.
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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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from oslo_config import cfg
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from oslo_log import log
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import oslo_messaging as messaging
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from watcher._i18n import _LE
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from watcher.common import context as watcher_context
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from watcher.common import exception
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__all__ = [
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'init',
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'cleanup',
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'set_defaults',
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'add_extra_exmods',
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'clear_extra_exmods',
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'get_allowed_exmods',
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'RequestContextSerializer',
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'get_client',
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'get_server',
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'get_notifier',
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'TRANSPORT_ALIASES',
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]
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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TRANSPORT = None
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NOTIFICATION_TRANSPORT = None
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NOTIFIER = None
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ALLOWED_EXMODS = [
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exception.__name__,
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]
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EXTRA_EXMODS = []
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# NOTE(lucasagomes): The watcher.openstack.common.rpc entries are for
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# backwards compat with IceHouse rpc_backend configuration values.
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TRANSPORT_ALIASES = {
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'watcher.openstack.common.rpc.impl_kombu': 'rabbit',
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'watcher.openstack.common.rpc.impl_qpid': 'qpid',
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'watcher.openstack.common.rpc.impl_zmq': 'zmq',
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'watcher.rpc.impl_kombu': 'rabbit',
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'watcher.rpc.impl_qpid': 'qpid',
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'watcher.rpc.impl_zmq': 'zmq',
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}
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JsonPayloadSerializer = messaging.JsonPayloadSerializer
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def init(conf):
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global TRANSPORT, NOTIFICATION_TRANSPORT, NOTIFIER
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exmods = get_allowed_exmods()
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TRANSPORT = messaging.get_transport(conf,
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allowed_remote_exmods=exmods,
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aliases=TRANSPORT_ALIASES)
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NOTIFICATION_TRANSPORT = messaging.get_notification_transport(
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conf,
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allowed_remote_exmods=exmods,
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aliases=TRANSPORT_ALIASES)
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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if not conf.notification_level:
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NOTIFIER = messaging.Notifier(
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NOTIFICATION_TRANSPORT, serializer=serializer, driver='noop')
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else:
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NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
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serializer=serializer)
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def initialized():
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return None not in [TRANSPORT, NOTIFIER]
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def cleanup():
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global TRANSPORT, NOTIFICATION_TRANSPORT, NOTIFIER
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if NOTIFIER is None:
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LOG.exception(_LE("RPC cleanup: NOTIFIER is None"))
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TRANSPORT.cleanup()
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NOTIFICATION_TRANSPORT.cleanup()
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TRANSPORT = NOTIFICATION_TRANSPORT = NOTIFIER = None
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def set_defaults(control_exchange):
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messaging.set_transport_defaults(control_exchange)
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def add_extra_exmods(*args):
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EXTRA_EXMODS.extend(args)
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def clear_extra_exmods():
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del EXTRA_EXMODS[:]
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def get_allowed_exmods():
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return ALLOWED_EXMODS + EXTRA_EXMODS
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class RequestContextSerializer(messaging.Serializer):
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def __init__(self, base):
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self._base = base
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def serialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.serialize_entity(context, entity)
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def deserialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.deserialize_entity(context, entity)
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def serialize_context(self, context):
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return context.to_dict()
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def deserialize_context(self, context):
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return watcher_context.RequestContext.from_dict(context)
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def get_client(target, version_cap=None, serializer=None):
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assert TRANSPORT is not None
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serializer = RequestContextSerializer(serializer)
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return messaging.RPCClient(TRANSPORT,
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target,
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version_cap=version_cap,
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serializer=serializer)
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def get_server(target, endpoints, serializer=None):
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assert TRANSPORT is not None
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serializer = RequestContextSerializer(serializer)
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return messaging.get_rpc_server(TRANSPORT,
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target,
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endpoints,
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executor='eventlet',
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serializer=serializer)
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def get_notifier(publisher_id):
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assert NOTIFIER is not None
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return NOTIFIER.prepare(publisher_id=publisher_id)
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