81 lines
3.0 KiB
Python
81 lines
3.0 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_messaging import serializer as oslo_serializer
|
|
|
|
DEFAULT_URL = "__default__"
|
|
TRANSPORTS = {}
|
|
|
|
|
|
def setup():
|
|
oslo_messaging.set_transport_defaults('aodh')
|
|
|
|
|
|
def get_transport(conf, 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(conf, url)
|
|
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 get_rpc_server(conf, transport, topic, endpoint):
|
|
"""Return a configured oslo_messaging rpc server."""
|
|
target = oslo_messaging.Target(server=conf.host, topic=topic)
|
|
serializer = oslo_serializer.RequestContextSerializer(
|
|
oslo_serializer.JsonPayloadSerializer())
|
|
return oslo_messaging.get_rpc_server(transport, target,
|
|
[endpoint], executor='threading',
|
|
serializer=serializer)
|
|
|
|
|
|
def get_rpc_client(transport, retry=None, **kwargs):
|
|
"""Return a configured oslo_messaging RPCClient."""
|
|
target = oslo_messaging.Target(**kwargs)
|
|
serializer = oslo_serializer.RequestContextSerializer(
|
|
oslo_serializer.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='threading',
|
|
allow_requeue=allow_requeue)
|
|
|
|
|
|
def get_notifier(transport, publisher_id):
|
|
"""Return a configured oslo_messaging notifier."""
|
|
serializer = oslo_serializer.RequestContextSerializer(
|
|
oslo_serializer.JsonPayloadSerializer())
|
|
notifier = oslo_messaging.Notifier(transport, serializer=serializer)
|
|
return notifier.prepare(publisher_id=publisher_id)
|