80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 99Cloud zhangguoqing <zhang.guoqing@99cloud.net>
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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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from oslo_config import cfg
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import oslo_messaging
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from oslo_messaging.rpc import dispatcher
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DEFAULT_URL = "__default__"
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RPC_TARGET = None
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TRANSPORTS = {}
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def setup():
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oslo_messaging.set_transport_defaults('cloudkitty')
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def get_transport(url=None, optional=False, cache=True):
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"""Initialise the oslo_messaging layer."""
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global TRANSPORTS, DEFAULT_URL
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cache_key = url or DEFAULT_URL
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transport = TRANSPORTS.get(cache_key)
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if not transport or not cache:
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try:
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transport = oslo_messaging.get_rpc_transport(cfg.CONF, url)
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except (oslo_messaging.InvalidTransportURL,
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oslo_messaging.DriverLoadFailure):
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if not optional or url:
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# NOTE(sileht): oslo_messaging is configured but unloadable
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# so reraise the exception
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raise
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return None
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else:
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if cache:
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TRANSPORTS[cache_key] = transport
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return transport
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def get_target():
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global RPC_TARGET
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if RPC_TARGET is None:
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RPC_TARGET = oslo_messaging.Target(topic='cloudkitty', version='1.0')
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return RPC_TARGET
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def get_client(version_cap=None):
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transport = get_transport()
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target = get_target()
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return oslo_messaging.RPCClient(transport, target, version_cap=version_cap)
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def get_server(target=None, endpoints=None):
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access_policy = dispatcher.DefaultRPCAccessPolicy
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transport = get_transport()
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if not target:
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target = get_target()
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return oslo_messaging.get_rpc_server(transport, target,
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endpoints, executor='threading',
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access_policy=access_policy)
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def cleanup():
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"""Cleanup the oslo_messaging layer."""
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global TRANSPORTS, NOTIFIERS
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NOTIFIERS = {}
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for url in TRANSPORTS:
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TRANSPORTS[url].cleanup()
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del TRANSPORTS[url]
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