106 lines
3.4 KiB
Python
106 lines
3.4 KiB
Python
# 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 eventlet
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from oslo_config import cfg
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import oslo_messaging
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from oslo_serialization import jsonutils
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from dcorch.common import context
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TRANSPORT = None
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NOTIFIER = None
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class RequestContextSerializer(oslo_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, ctxt, entity):
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if not self._base:
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return entity
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return self._base.serialize_entity(ctxt, entity)
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def deserialize_entity(self, ctxt, entity):
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if not self._base:
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return entity
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return self._base.deserialize_entity(ctxt, entity)
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@staticmethod
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def serialize_context(ctxt):
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return ctxt.to_dict()
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@staticmethod
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def deserialize_context(ctxt):
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return context.RequestContext.from_dict(ctxt)
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class JsonPayloadSerializer(oslo_messaging.NoOpSerializer):
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@classmethod
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def serialize_entity(cls, context, entity):
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return jsonutils.to_primitive(entity, convert_instances=True)
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def setup(url=None, optional=False):
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"""Initialise the oslo_messaging layer."""
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global TRANSPORT, NOTIFIER
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if url and url.startswith("fake://"):
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# NOTE: oslo_messaging fake driver uses time.sleep
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# for task switch, so we need to monkey_patch it
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eventlet.monkey_patch(time=True)
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if not TRANSPORT:
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oslo_messaging.set_transport_defaults('dcorch-engine')
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exmods = ['dcorch-engine.common.exception']
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try:
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TRANSPORT = oslo_messaging.get_transport(
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cfg.CONF, url, allowed_remote_exmods=exmods)
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except oslo_messaging.InvalidTransportURL as e:
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TRANSPORT = None
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if not optional or e.url:
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raise
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if not NOTIFIER and TRANSPORT:
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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NOTIFIER = oslo_messaging.Notifier(TRANSPORT, serializer=serializer)
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def cleanup():
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"""Cleanup the oslo_messaging layer."""
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global TRANSPORT, NOTIFIER
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if TRANSPORT:
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TRANSPORT.cleanup()
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TRANSPORT = NOTIFIER = None
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def get_rpc_server(target, endpoint):
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"""Return a configured oslo_messaging rpc server."""
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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return oslo_messaging.get_rpc_server(TRANSPORT, target, [endpoint],
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executor='eventlet',
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serializer=serializer)
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def get_rpc_client(**kwargs):
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"""Return a configured oslo_messaging RPCClient."""
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target = oslo_messaging.Target(**kwargs)
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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return oslo_messaging.RPCClient(TRANSPORT, target,
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serializer=serializer)
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def get_notifier(publisher_id):
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"""Return a configured oslo_messaging notifier."""
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return NOTIFIER.prepare(publisher_id=publisher_id)
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