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# Copyright 2017 Huawei Technologies Co.,LTD.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
from oslo_context import context as cyborg_context
import oslo_messaging as messaging
from oslo_messaging.rpc import dispatcher
from cyborg.common import exception
CONF = cfg.CONF
TRANSPORT = None
NOTIFICATION_TRANSPORT = None
NOTIFIER = None
ALLOWED_EXMODS = [
exception.__name__,
]
EXTRA_EXMODS = []
def init(conf):
global TRANSPORT, NOTIFICATION_TRANSPORT, NOTIFIER
exmods = get_allowed_exmods()
#TRANSPORT = messaging.get_rpc_transport(conf,
TRANSPORT = messaging.get_transport(conf,
allowed_remote_exmods=exmods)
NOTIFICATION_TRANSPORT = messaging.get_notification_transport(
conf,
allowed_remote_exmods=exmods)
serializer = RequestContextSerializer(messaging.JsonPayloadSerializer())
NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
serializer=serializer,
topics=['notifications'])
def cleanup():
global TRANSPORT, NOTIFICATION_TRANSPORT, NOTIFIER
assert TRANSPORT is not None
assert NOTIFICATION_TRANSPORT is not None
assert NOTIFIER is not None
TRANSPORT.cleanup()
NOTIFICATION_TRANSPORT.cleanup()
TRANSPORT = NOTIFICATION_TRANSPORT = NOTIFIER = None
def set_defaults(control_exchange):
messaging.set_transport_defaults(control_exchange)
def add_extra_exmods(*args):
EXTRA_EXMODS.extend(args)
def clear_extra_exmods():
del EXTRA_EXMODS[:]
def get_allowed_exmods():
return ALLOWED_EXMODS + EXTRA_EXMODS
class RequestContextSerializer(messaging.Serializer):
def __init__(self, base):
self._base = base
def serialize_entity(self, context, entity):
if not self._base:
return entity
return self._base.serialize_entity(context, entity)
def deserialize_entity(self, context, entity):
if not self._base:
return entity
return self._base.deserialize_entity(context, entity)
def serialize_context(self, context):
return context.to_dict()
def deserialize_context(self, context):
return cyborg_context.RequestContext.from_dict(context)
def get_client(target, version_cap=None, serializer=None):
assert TRANSPORT is not None
serializer = RequestContextSerializer(serializer)
return messaging.RPCClient(TRANSPORT,
target,
version_cap=version_cap,
serializer=serializer)
def get_server(target, endpoints, serializer=None):
assert TRANSPORT is not None
# comment by bob
#access_policy = dispatcher.DefaultRPCAccessPolicy
serializer = RequestContextSerializer(serializer)
return messaging.get_rpc_server(TRANSPORT,
target,
endpoints,
executor='eventlet',
serializer=serializer)
#access_policy=access_policy)
def get_notifier(service=None, host=None, publisher_id=None):
assert NOTIFIER is not None
if not publisher_id:
publisher_id = "%s.%s" % (service, host or CONF.host)
return NOTIFIER.prepare(publisher_id=publisher_id)
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