deb-ceilometer/ceilometer/messaging.py
Dina Belova fc7e781344 Use oslo_config instead of deprecated oslo.config
Change-Id: I85d5c8d3d9f00f86fd14500be0da1289f5672614
2015-01-15 12:51:18 +04:00

143 lines
4.9 KiB
Python
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# -*- coding: utf-8 -*-
# Copyright 2013 eNovance <licensing@enovance.com>
#
# Author: Mehdi Abaakouk <mehdi.abaakouk@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.serialization import jsonutils
from oslo_config import cfg
from oslo_context import context
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