1ff93a221e
oslo.serialization 1.2.0 has moved its namespace from old oslo.serialization to oslo_serialization, the old import style can still work, but will not be supported in next release cycle. Let's sync it. Change-Id: I736ac975c50b2550548fde054c7840960435a698
141 lines
4.9 KiB
Python
141 lines
4.9 KiB
Python
# -*- coding: utf-8 -*-
|
||
# Copyright 2013 eNovance <licensing@enovance.com>
|
||
#
|
||
# 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.
|
||
|
||
import oslo.messaging
|
||
from oslo_config import cfg
|
||
from oslo_context import context
|
||
from oslo_serialization import jsonutils
|
||
|
||
DEFAULT_URL = "__default__"
|
||
TRANSPORTS = {}
|
||
|
||
_ALIASES = {
|
||
'ceilometer.openstack.common.rpc.impl_kombu': 'rabbit',
|
||
'ceilometer.openstack.common.rpc.impl_qpid': 'qpid',
|
||
'ceilometer.openstack.common.rpc.impl_zmq': 'zmq',
|
||
}
|
||
|
||
|
||
class RequestContextSerializer(oslo.messaging.Serializer):
|
||
def __init__(self, base):
|
||
self._base = base
|
||
|
||
def serialize_entity(self, ctxt, entity):
|
||
if not self._base:
|
||
return entity
|
||
return self._base.serialize_entity(ctxt, entity)
|
||
|
||
def deserialize_entity(self, ctxt, entity):
|
||
if not self._base:
|
||
return entity
|
||
return self._base.deserialize_entity(ctxt, entity)
|
||
|
||
@staticmethod
|
||
def serialize_context(ctxt):
|
||
return ctxt.to_dict()
|
||
|
||
@staticmethod
|
||
def deserialize_context(ctxt):
|
||
return context.RequestContext(ctxt)
|
||
|
||
|
||
class JsonPayloadSerializer(oslo.messaging.NoOpSerializer):
|
||
@classmethod
|
||
def serialize_entity(cls, context, entity):
|
||
return jsonutils.to_primitive(entity, convert_instances=True)
|
||
|
||
|
||
def setup():
|
||
oslo.messaging.set_transport_defaults('ceilometer')
|
||
|
||
|
||
def get_transport(url=None, optional=False, cache=True):
|
||
"""Initialise the oslo.messaging layer."""
|
||
global TRANSPORTS, DEFAULT_URL
|
||
cache_key = url or DEFAULT_URL
|
||
transport = TRANSPORTS.get(cache_key)
|
||
if not transport or not cache:
|
||
try:
|
||
transport = oslo.messaging.get_transport(cfg.CONF, url,
|
||
aliases=_ALIASES)
|
||
except oslo.messaging.InvalidTransportURL as e:
|
||
if not optional or e.url:
|
||
# NOTE(sileht): oslo.messaging is configured but unloadable
|
||
# so reraise the exception
|
||
raise
|
||
return None
|
||
else:
|
||
if cache:
|
||
TRANSPORTS[cache_key] = transport
|
||
return transport
|
||
|
||
|
||
def cleanup():
|
||
"""Cleanup the oslo.messaging layer."""
|
||
global TRANSPORTS, NOTIFIERS
|
||
NOTIFIERS = {}
|
||
for url in TRANSPORTS:
|
||
TRANSPORTS[url].cleanup()
|
||
del TRANSPORTS[url]
|
||
|
||
|
||
def get_rpc_server(transport, topic, endpoint):
|
||
"""Return a configured oslo.messaging rpc server."""
|
||
cfg.CONF.import_opt('host', 'ceilometer.service')
|
||
target = oslo.messaging.Target(server=cfg.CONF.host, topic=topic)
|
||
serializer = RequestContextSerializer(JsonPayloadSerializer())
|
||
return oslo.messaging.get_rpc_server(transport, target,
|
||
[endpoint], executor='eventlet',
|
||
serializer=serializer)
|
||
|
||
|
||
def get_rpc_client(transport, retry=None, **kwargs):
|
||
"""Return a configured oslo.messaging RPCClient."""
|
||
target = oslo.messaging.Target(**kwargs)
|
||
serializer = RequestContextSerializer(JsonPayloadSerializer())
|
||
return oslo.messaging.RPCClient(transport, target,
|
||
serializer=serializer,
|
||
retry=retry)
|
||
|
||
|
||
def get_notification_listener(transport, targets, endpoints,
|
||
allow_requeue=False):
|
||
"""Return a configured oslo.messaging notification listener."""
|
||
return oslo.messaging.get_notification_listener(
|
||
transport, targets, endpoints, executor='eventlet',
|
||
allow_requeue=allow_requeue)
|
||
|
||
|
||
def get_notifier(transport, publisher_id):
|
||
"""Return a configured oslo.messaging notifier."""
|
||
serializer = RequestContextSerializer(JsonPayloadSerializer())
|
||
notifier = oslo.messaging.Notifier(transport, serializer=serializer)
|
||
return notifier.prepare(publisher_id=publisher_id)
|
||
|
||
|
||
def convert_to_old_notification_format(priority, ctxt, publisher_id,
|
||
event_type, payload, metadata):
|
||
# FIXME(sileht): temporary convert notification to old format
|
||
# to focus on oslo.messaging migration before refactoring the code to
|
||
# use the new oslo.messaging facilities
|
||
notification = {'priority': priority,
|
||
'payload': payload,
|
||
'event_type': event_type,
|
||
'publisher_id': publisher_id}
|
||
notification.update(metadata)
|
||
for k in ctxt:
|
||
notification['_context_' + k] = ctxt[k]
|
||
return notification
|