81b45f2c1d
The statless design was developed in the experiment branch, the experiment shows advantage in removing the status synchronization, uuid mapping compared to the stateful design, and also fully reduce the coupling with OpenStack services like Nova, Cinder. The overhead query latency for resources also acceptable. It's time to move the statless design to the master branch BP: https://blueprints.launchpad.net/tricircle/+spec/implement-stateless Change-Id: I51bbb60dc07da5b2e79f25e02209aa2eb72711ac Signed-off-by: Chaoyi Huang <joehuang@huawei.com>
136 lines
3.8 KiB
Python
Executable File
136 lines
3.8 KiB
Python
Executable File
# Copyright 2015 Huawei Technologies Co., Ltd.
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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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#
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# copy and modify from Nova
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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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]
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from oslo_config import cfg
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import oslo_messaging as messaging
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from oslo_serialization import jsonutils
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import tricircle.common.context
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import tricircle.common.exceptions
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CONF = cfg.CONF
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TRANSPORT = None
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NOTIFIER = None
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ALLOWED_EXMODS = [
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tricircle.common.exceptions.__name__,
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]
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EXTRA_EXMODS = []
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def init(conf):
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global 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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serializer = RequestContextSerializer(JsonPayloadSerializer())
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NOTIFIER = messaging.Notifier(TRANSPORT, serializer=serializer)
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def cleanup():
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global TRANSPORT, NOTIFIER
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assert TRANSPORT is not None
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assert NOTIFIER is not None
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TRANSPORT.cleanup()
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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 JsonPayloadSerializer(messaging.NoOpSerializer):
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@staticmethod
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def serialize_entity(context, entity):
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return jsonutils.to_primitive(entity, convert_instances=True)
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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 tricircle.common.context.Context.from_dict(context)
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def get_transport_url(url_str=None):
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return messaging.TransportURL.parse(CONF, url_str)
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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(service, host=None, publisher_id=None):
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assert NOTIFIER is not None
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if not publisher_id:
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publisher_id = "%s.%s" % (service, host or CONF.host)
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return NOTIFIER.prepare(publisher_id=publisher_id)
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